The element that has a number of electrons 14 is silicon.
Any material that is totally composed of the same kinds of atoms is said to be an element. For instance, the element carbon is made up entirely of carbon atoms. The number of protons in an atom is indicated by the element's atomic number. The quantity of protons and electrons inside a neutral atom must match.
An element's position on the periodic table is also indicated by its atomic number.
An element possesses 14 electrons, as stated in the question. Since this suggests that it must contain 14 protons, its atomic number must be 14.
In order to locate the element, we must first put down any potential electronic configurations for the element:
1s²2s²2p⁶3s²3p²
In the outermost shell, there are four electrons. The element therefore has 4 electrons in its valence shell. Therefore, this element's period number is 4.
Additionally, the element's group number will be equivalent to:
(Valence electrons + 10) or (4 + 10) equals the 14th group
The element is a p-block element as a result. And silicon is the element that corresponds to the 14th group and 4th period of the periodic table.
Thus, silicon, which possesses 14 electrons, is the correct answer.
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In terms of binding energy per nucleon, what element divides fission and fusion processes? O He
O U O Fe
O C
O H
Fe which is Iron is the element that distinguishes between fission and fusion processes in terms of binding energy per nucleon.
Since the negatively charged electrons are held in place by the electrostatic pull of the positively charged nucleus, the electron binding energy is the lowest energy needed to remove an electron from an atom. Fe element distinguishes between fission and fusion processes in terms of binding energy per nucleon. In particle physics, the term "binding energy" describes the energy an atom receives from electromagnetic interaction as well as the quantity of energy needed to break an atom down into free nucleons.
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A mixture of gases contains oxygen, nitrogen, and hydrogen at 0 degrees Celsius. The partial pressure of the oxygen gas is 20 kPa, the partial pressure of nitrogen gas is 40 kPa, and the partial pressure of hydrogen gas is 14 kPa. What is the total pressure exerted
The total pressure exerted by the gas mixture is 74 kPa.
What is hydrogen?Hydrogen is an odorless, colorless, and tasteless gas that is the most abundant element in the universe. It is the lightest of all elements and is a component of many compounds, such as water and hydrocarbons. Hydrogen has the highest energy content of any common fuel, making it an attractive energy source. Additionally, it is utilised in the manufacture of fertiliser, polymers, and pharmaceuticals as well as a propellant.
This is calculated by adding up the partial pressures of each individual gas in the mixture, which in this case is 20 kPa for oxygen, 40 kPa for nitrogen, and 14 kPa for hydrogen. 20 + 40 + 14 = 74
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A compound is found to contain 15.94 % boron and 84.06 % fluorine by mass. What is the empirical formula for this compound
The empirical formula of the compound is BF3.
The empirical formula of a compound is the simplest whole-number ratio of atoms that represents the compound's composition. To determine the empirical formula of a compound, we need to determine the number of moles of each element present and then simplify the ratio of moles to the smallest whole-number ratio.
First, we can use the percentages of boron and fluorine to find the number of grams of each element present in 100 grams of the compound:
15.94 g boron / 100 g compound
84.06 g fluorine / 100 g compound
Next, we can convert the number of grams of each element to moles using the molar masses of boron and fluorine:
15.94 g B / (10.81 g/mol) = 1.48 mol B
84.06 g F / (18.99 g/mol) = 4.44 mol F
To find the empirical formula, we divide the number of moles of each element by the lowest number of moles:
1.48 mol B / 1.48 mol B = 1.00
4.44 mol F / 1.48 mol B = 3.00
So the empirical formula of the compound is BF3.
It's important to note that this is the empirical formula, and the actual formula of the compound could be a multiple of this depending on the chemical structure of the compound.
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What is the mass in grams of 1.56 moles of aspartame?
459.1 g of aspartame has a 1.56 moles of aspartame.
Artificial sweetener aspartame is potent and low in calories. About 200 times sweeter than sugar, it is a white, odourless powder. It is legal to use in Europe as a tabletop sweetener, an energy-reducing food ingredient in beverages, desserts, and sweets, dairy products, chewing gum, and other foods.
Aspartame is a dipeptide that is created through the formal condensation of the amino group of methyl L-phenylalaninate with the alpha-carboxy group of L-aspartic acid.
Here, aspartame has 1.56 moles.
Molar mass of aspartame = 294.40 g/mol
So, Number of moles of aspartame = [tex]\frac{Given Mass}{Molar Mass}[/tex]
Mass of aspartame = Number of moles × Molar mass
or, mass = 1.56 × 294.3
or, mass = 459.1 g
Hence, Mass of aspartame of 1.56 moles of aspartame is 459.1 g.
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Diatomic elements are important. what makes them different from other elemental substances?
Diatomic elements are different from other elemental substances because they consist of two atoms of the same element bound together.
What are Diatomic elements?
Diatomic elements are elements that generally exist as molecules composed of two atoms of the same element. The seven elements that exist as diatomic molecules are hydrogen (H2), oxygen (O2), nitrogen (N2), fluorine (F2), chlorine (Cl2), bromine (Br2), and iodine (I2).
The two atoms form a covalent bond, meaning that each atom shares its outermost electrons with the other atom. This creates a strong bond between the two atoms, making the diatomic element more stable and less reactive than other elemental substances.
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Does carbon-14 or nitrogen-14 have more neutrons?
Carbon 14 would have more neutron than nitrogen 14
The atomic number of an atom, as is generally known, represents the total number of protons that make up the nucleus of that atom. We are aware that the mass number of carbon is 14, and that its atomic number is 6. It is well-known that protons and neutrons combine to form mass. As a result, there will be = 14 - 6 = 8 neutrons.
while he mass number of nitrogen is 14, and that its atomic number is 7. It is well-known that protons and neutrons combine to form mass. As a result, there will be = 14 - 7 = 7 neutrons.
Therefore, Carbon 14 would have more neutron than nitrogen 14
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How do we measure the distance?
We measure the distance through many objects like; Radar, Parallax, Capheids, Redshift and Hubble's Law etc.
Distance is termed as the size or magnitude of the displacement between two positions.
There are several ways to measure the distance in terms of science. Firstly, Radar: It is used to measure the distance in our solar system and to measuring the distances to nearby the stars are Parallax. Whereas, Capheids is also used to measuring the distance in our galaxy and to nearby the galaxies. However, Supernovae will measuring the distances to other galaxies and the last one is Redshift and Hubble's Law it is used to measuring the distances to objects which is far away.
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Container A holds 747 mL747 mL of ideal gas at 2.90 bar2.90 bar . Container B holds 119 mL119 mL of ideal gas at 4.30 bar4.30 bar . If the gases are allowed to mix together, what is the partial pressure of each gas in the total volume
the partial pressure of gas A in the total volume is 3.57 bar, and the partial pressure of gas B in the total volume is 0.70 bar.
When the gases are allowed to mix together, the total pressure of the mixture is equal to the sum of the partial pressures of each gas. The partial pressure of each gas is equal to the product of the total pressure and the mole fraction of that gas. To find the mole fraction of each gas, we first need to find the number of moles of each gas. The number of moles of gas in container A is given by PV/RT where P is the pressure, V is the volume, R is the ideal gas constant and T is the temperature.
n_A = (2.90 bar * 747 mL) / (8.314 J/molK * (273.15 + 23)) = 0.0295 mol
The number of moles of gas in container B is given by PV/RT
n_B = (4.30 bar * 119 mL) / (8.314 J/molK * (273.15 + 23)) = 0.0045 mol
The total number of moles of gas in the mixture is the sum of the number of moles of gas in container A and container B.
n_total = n_A + n_B = 0.0295 mol + 0.0045 mol = 0.0340 mol
The mole fraction of gas A in the mixture is the number of moles of gas A divided by the total number of moles of gas.
x_A = n_A / n_total = 0.0295 mol / 0.0340 mol = 0.8735
The mole fraction of gas B is
x_B = n_B / n_total = 0.0045 mol / 0.0340 mol = 0.1324
The partial pressure of gas A is equal to the total pressure multiplied by the mole fraction of gas A.
P_A = (0.8735) * (2.90 bar + 4.30 bar) = 3.57 bar. The partial pressure of gas B is equal to the total pressure multiplied by the mole fraction of gas B. P_B = (0.1324) * (2.90 bar + 4.30 bar) = 0.70 bar
So the partial pressure of gas A in the total volume is 3.57 bar, and the partial pressure of gas B in the total volume is 0.70 bar.
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Which of the following properties can be used to describe both the particle model of light and the wave model of light
An absolutely interesting occurrence is light. Despite the fact that it is well recognized that light is an electromagnetic, it is frequently more practical to characterise or characterize light in other ways than only as a wave.
For instance, light is frequently depicted as anything other than a wave in spectroscopy and fundamental physics.
Similar to how we replicate oceans moving through water, the Wave Model illustrates how light propagates. Colors can be explained using the Wave Model by including information about wavelength.
The Light Wave Model. Similar to how we simulate ocean waves moving across water, the Wave Model illustrates how light propagates. We can explain qualities of light by imagining it to be an oscillating wave.
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If 25.0 mL of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution?
Answer:2.5M
Explanation:
let the number of moles = x
x/0.025L =15
x= 15*0.025 = 0.375 moles
the concentration of the new solution = moles / volume =
0.375 / (0.025+0.125) = 2.5M
diatomic elements are important. what makes them different from other elemental substances?
Other elemental substances in that they consist of two atoms of the same element, bonded together.
What is Diatomic elements?Diatomic elements are chemical elements that exist in the form of two atoms held together by covalent bonds. The most common elements that exist as diatomic molecules are hydrogen, oxygen, nitrogen, fluorine, chlorine, bromine, and iodine. These elements are found in nature and play important roles in the formation of compounds used in everyday life.
This bond is usually covalent in nature, and the two atoms form a stable molecule. This type of molecule is very stable and present in the form of gas, at room temperature and pressure. Examples of diatomic elements are hydrogen, oxygen, nitrogen, fluorine, chlorine, and bromine. Due to the fact that these elements are already in a stable, two-atom form, they exhibit different chemical and physical properties than other elements. For example, diatomic oxygen is highly reactive and can easily combine with other elements, while diatomic nitrogen is relatively inert. This difference in reactivity is due to the fact that the two atoms in the diatomic form share electrons more easily than atoms in other elemental forms.
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Calculate the mass of water needed to prepare 45 g of salt solution if the salt content in the solution is 12%.
The mass of water needed to prepare 45 g of salt solution if the salt content in the solution is 12% is 330g.
The solute is the thing that needs to dissolve, and the solvent is the thing that needs to dissolve it. With a wide variety of solutes and solvents, solutions can be created. We are aware of a wide range of solutions.
Given,
Mass of the salt solution (Solute) = 45g
salt content in the solution = 12%
Let Mass of water = x
Total mass of solution = 45 + x
Concentration of solution = Mass of solute / Mass of Solution × 100
⇒ 12 = 45 / 45 + x × 100
⇒ 12/100 = 45 / 45 + x
⇒ 0.12 = 45 / 45 + x
⇒ 0.12 (45 + x) = 45
⇒ 5.4 + 0.12x = 45
⇒ 0.12x = 45 - 5.4
⇒ x = 330g
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select all that apply. please help! i will mark you brainliest
Kinetic energy increases as mass increases
The shape of the mass vs energy graph shows a linear relationship
When we double the mass, we double the energy.
Interpreting a graphThe graph shown in the image is a plot of the kinetic energy of objects on the y-axis and the mass of the objects on the x-axis.
The graph is a straight line. This shows that there is a linear relationship between the two parameters - the kinetic energy and mass of objects. Thus, the kinetic energy increases as mass of objects increases, and decreases as mass of objects increases.
From the graph, when the mass of objects are doubled, there is also a double in the amount of the kinetic energy of objects.
In summary, the graph shows that:
Kinetic energy increases as mass increasesThe shape of the mass vs energy graph shows a linear relationshipWhen we double the mass, we double the energy.More on interpreting graphs can be found here: https://brainly.com/question/28418462
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Which of the following answer choices would BEST describe Marco Polo's reaction when he saw the Chinese using coal
The majority of Europeans at the time had never heard of coal, which Marco Polo described as "black stones...which burn like logs."
Initially, charcoal was utilized in the production process, which caused extensive deforestation in northern China. However, coal had fully replaced charcoal by the end of the 11th century.
They do indeed have an abundance of firewood. However, due to the massive population and the large number of bathhouses and baths that are continually being heated, it would be impossible to supply enough firewood, as everyone takes a bath at least three times each week, and in the winter, if they can, every day. Since every man of rank and means has a bathroom of his own at home, the abundance and low cost of these stones result in significant wood savings.
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Warm air rises because:
A.) It is made of helium
B.) As it warms the particles spread out making it less dense
C.) As it warms the particles get closer together making it more dense
D.) Air always moves towards the sun or moon due to gravity
As the air gets warmer it rises because, particles spread out making it less dense. The diffusing capability of gas molecules make it possible.
What is intermolecular forces ?Intermolecular force are the force that keep the particles of a substance binded together. Gaseous molecule easily diffuse in air , since the intermolecular attraction is very less in them.
In solid state molecules are densely packed and difficult to move apart. In liquid state , particles have some space to move and in gases molecules are far apart due to less intermolecular force.
As the gas molecules in air absorbs heat energy, they overcome all the intermolecular forces and will spread out in the air. Thus, they rises above over a temperature gradient.
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Place the following molecules in order of decreasing bond angle: NH3, CO2, CCl4, OF2
O CO2 > CCl4 > NH3 > OF2
O NH3 > CO2 > CCl4 > OF2
O CO2 > CCl4 > OF2 > NH3
O CCl4 > CO2 > OF2 > NH3
O OF2 > NH3 > CCl4 > CO2
The order of decreasing bond angle for the given molecules is :
O OF2 > NH3 > CCl4 > CO2
In molecules with a central atom, the bond angle is determined by the electron pair-bond pair repulsion. The bond angle decreases as the number of electron pair-bond pair increases. In OF2 the central atom is O, and it has 2 lone pairs and 2 single bonds, the bond angle is expected to be smaller than in the other molecules.In NH3, the central atom is N, and it has 3 single bonds and 1 lone pair, the bond angle is expected to be larger than in OF2 but smaller than in CO2 and CCl4. In CO2 and CCl4, the central atoms are C and Cl respectively, and they have 4 single bonds and no lone pairs, the bond angle is expected to be larger than in NH3, but smaller than in OF2.
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In what part of this system are the two energy outputs found?
The part of the system that has two outputs of energy is the bulb.
What is the energy transformation?We would have to recall that on the basis of the first law of thermodynamics, it can be said that energy can not be created nor destroyed but that energy would have to be converted from one form to the other.
In this case, we can see that as the boy is cycling, there is the conversion of the mechanical energy of the boy to the heat and the light energy of the bulb as shown. These are the outputs referred to above.
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What effect will dissolving larger amounts of sugar in a beaker of water have on the concentration and conductivity of the solution
Both concentration and conductivity increase when larger amounts of sugar in a beaker of water dissolves.
The volume of the resulting solution will be larger than one quart if you dissolve a cup of sugar in a quart of water. In comparison to distilled water, the concentration of solutes inside the cell is higher. Most of the time, a particular amount of solvent can only dissolve a specific maximum amount of solute. This maximum amount is specified as the solubility of the solute. Only solutions with charge carriers will be able to conduct electricity. Simply having polar molecules in the solution is insufficient. It must be able to transfer electrons between points with the least amount of interference.
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The piston in the engine of a car converts the energy released by octane combustion into mechanical work that turns the crankshaft. Some of the energy is lost to the environment as heat. What are the appropriate signs on q and w for this process
Thermal energy is transformed into kinetic energy that is, the energy of a moving object in this example, the moving piston by the engine. So, the sign of heat is negative and work done is negative.
A complicated device known as a combustion engine consumes fuel to produce thermal energy, which is subsequently used to drive tasks. In a car, the engine is responsible for generating the kinetic energy needed to turn the wheels. An internal combustion engine is the type of combustion engine used in automobiles. Internal-combustion engines are those found in gasoline or diesel-powered automobiles. Such an engine obtains its power from the heat produced during the combustion of the working fluids that have not yet reacted, the oxidizer-fuel mixture. As the heat is released to convert into the kinetic energy the sign of heat is negative and the sign of work done by the internal combustion of vehicles is negative.
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different between ionic and metallic bond
Answer:
Whereas ionic bonds join metals to non-metals, metallic bonding joins a bulk of metal atoms.
Explanation:
hope this helps
How do you most effectively increase the buffering capacity of a pH 4.9 buffer containing acetate (pKa 4.76)
A conjugate base solution with a pH between 8 and 10 has little buffer capacity, however at higher pHs, the strong base's presence begins to matter more.
Because of the large concentration of H + cations, a pure acetic acid solution with a pH below 3 already has a pH that is resistant to changes. This is because the concentration of the capacity is so high that it is unaffected by changes in the equilibrium of the solution brought on by the concentration of other ions. Why is a buffer more effective if its pKa is close to the pH? Why does a buffer function best when pH and pKa are equal? Why does increasing the pH by a basic or an acid.
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Please help with these 10 questions!! Show all work!! Will give brainliest!! :)
Carbon Dioxide: CO2
Formula: C + O2
15.0 moles of CO2 contains (15.0 moles CO2) x (1 mole C / 1 mole CO2) = 15.0 moles of C
Carbon Dioxide: CO2
Formula: C + O2
15.0 moles of CO2 contains (15.0 moles CO2) x (2 moles O / 1 mole CO2) = 30.0 moles of O
Calcium Chloride: CaCl2
Formula: Ca + 2Cl
23.0 moles of CaCl2 contains (23.0 moles CaCl2) x (1 mole Cl / 2 moles Cl) = 11.5 moles of Cl
Sulfur Dioxide: SO2
Formula: S + O2
295.0 grams of SO2 contains (295.0 grams SO2) x (1 mole S / 64.066 grams) = 4.6 moles of S
Potassium Sulfate: K2SO4
Formula: 2K + S + 4O
295.0 grams of K2SO4 contains (295.0 grams K2SO4) x (1 mole S / 174.259 grams) = 1.69 moles of S
Iron: Fe
Formula: Fe
565.0 grams of Fe contains (565.0 grams Fe) x (1 mole Fe / 55.845 grams) = 10.15 moles of Fe
metallic elements
SO2 is a covalent compound. It consists of one sulfur atom and two oxygen atoms joined together by covalent bonds, which are strong chemical bonds where electrons are shared between atoms.
H
|
O-H
A water molecule is polar because the electrons are not shared equally between the oxygen and hydrogen atoms. Oxygen is more electronegative than hydrogen, so it pulls the electrons closer to itself, creating a partial negative charge on the oxygen side of the molecule and a partial positive charge on the hydrogen side. This causes the molecule to have a dipole moment and makes the molecule polar.
NH3 (Ammonia) - the molecule is a pyramidal shape, which means that the Nitrogen is at the center and the three hydrogen atoms are located at the three corners of a pyramid.
H2O (Water) - the molecule is a V-shape, this shape is determined by the angle between the two bonding pairs and the two non-bonding pairs of electrons.
CH4 (Methane) - the molecule is tetrahedral shape, the carbon is in the center, and the four hydrogen atoms surround the carbon in a tetrahedral arrangement.
A color change
The formation of a precipitate
The evolution of a gas
A change in temperature
Uday Tahlan
What is the density (using proper sig figs) of a rock with a volume of 6.7 mL and a mass of 12.34 grams?
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, the density of a rock with a volume of 6.7 mL and a mass of 12.34 grams is 1.841g/ml.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density of rock = Mass of the rock ÷volume marked on the graduated cylinder
volume of rock= 6.7 mL
mass of rock= 12.34 grams
Substituting all the values in above formula, we get
Density of rock= 12.34 grams÷6.7 mL
=1.841g/ml
Therefore, the density of a rock with a volume of 6.7 mL and a mass of 12.34 grams is 1.841g/ml.
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Why is it that some materials made up of entirely nonmetal atoms are soluble in water while some are not
some materials made up of entirely nonmetal atoms are soluble in water while some are not Due to different combinations of pairs created, which might either dissolve extremely well, or not dissolve whatsoever
The solubility of a substance in water depends on the nature of the chemical interactions between the substance and the water molecules. Some materials made up of entirely nonmetal atoms are soluble in water because they can form hydrogen bonds with the water molecules. These materials are called polar solvents and are typically composed of polar molecules, like those found in many organic compounds. For example, ethanol (C2H5OH) is a polar solvent that is composed of entirely nonmetal atoms and is soluble in water because it can form hydrogen bonds with the water molecules.On the other hand, some materials composed of entirely nonmetal atoms are not soluble in water because they do not form hydrogen bonds with the water molecules. These materials are called non-polar solvents and are typically composed of non-polar molecules, like those found in many hydrocarbons.
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In a given reaction, the rate may be expressed as either rate What must be true about X or Y if the reaction is proceeding in the forward direction
In a given reaction, the rate may be expressed as either the rate of formation of a product (X) or the rate of consumption of a reactant (Y). If the reaction is proceeding in the forward direction, the rate of formation of the product (X) will be positive and the rate of consumption of the reactant (Y) will be negative.
This means that X is being produced at a faster rate than it is being consumed and Y is being consumed at a faster rate than it is being produced.
Alternatively, if the reaction proceeds in the opposite direction, the rate of formation of products (X) is negative and the rate of consumption of reactants (Y) is positive. This means that X is consumed faster than it is produced, and Y is produced faster than it is consumed.
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How many moles are in 50 grams?
3.125 moles of oxygen are present in 50 g.
A mole is the volume of a substance that contains 6.022 X 1023 of the substance's particles, atoms, ions, molecules, etc. A mole is a unit for counting molecules, ions, or atoms. Divide the given mass of an element by its molar mass to find the number of moles in that quantity.
The atomic weight of an element, or its relative atomic mass, on the periodic table, expressed in g/mol, is its molecular mass.
The molar mass of oxygen is 16 g/mol, and there are 3.125 moles in a given amount of mass and molar mass.
Consequently, 3.125 moles of oxygen are present in 50 g.
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What is the relationship between CO2 levels and sea levels?
The relationship between the CO₂ and the sea levels is the carbon dioxide is higher about 10 % at deep ocean than the surface.
This warms world due to the greenhouse gases that included the carbon dioxide , the water heat up and it expands due to which the sea level rises. if we remove the extra heat from the ocean that caused by the short lived gases , it lowers the sea levels and this process is very slow.
The carbon dioxide that dissolves in the ocean will cause the sea water to be acidify. this will harmful for the shellfish and the corals.
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15) Lidocaine 2 gm/500 mL D5W is ordered to run at 3.5 mg/min. At what rate should the IV pump be set
Ordered to run at 3.5 mg/min is a dose of lidocaine 2 g/500 mL D5W. The IV pump should be set at a rate of 52.5 mL per hour.
Given 1mg/min = 60mg/hour
Then 3.5 mg/min = 3.5 x 60 mg/hour = 210mg/hour
Lidocaine is 2gm/500mL = 2000mg/500mL
If you only need to calculate the infusion rate, or the amount of medication to infuse per hour, you can do it by taking the entire volume in mL and dividing it by the total number of hours the medication is supposed to be infused over. This will give you the rate in mL per hour.
Then the flow of rate = 210mg/hour / 2000mg/500mL = 210x500/2000 = 52.5mL/hour.
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How long will it take Caroline to travel 45 miles if she is traveling 37mph (miles per hour)?
In the given question,It will take Caroline 1.2 hours to travel 45 miles if she is traveling 37 mph (miles per hour).
As we know the velocity formula:
v = d/t
Where
V is velocity, d is distance and t is time.
as given in the question
distance = 45 miles
velocity = 37 mph
To find time t,
put the values in the formula:
t = d/v
t = 45/37
t = 1.2 hours
It will take Caroline 1.2 hours to travel 45 miles if she is traveling 37 mph (miles per hour).
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what is the magnetic field due to the wire at the location of the electron?
The trick with this type of problem is that they usually don't tell you anything because they don't seem to have enough information. But the key is in the phrase "parallel to the wire".
A charged particle in a field should normally bend. If not, there must be some other force at work that balances the magnetic force. In this case it is the electron attraction.
Therefore, the magnetic force on the electrons must be "upwards" (i.e., the electrons are supposed to be downwards, hence towards the wire). Also, its size must be equal to mg of electrons (its mass is easy to find).
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