Answer:
bases which are not soluble in water do not give the hydroxyl ions and so they are treated differently from soluble bases called alkalis.
what is the formula for iron ii phosphate when dissociation
Answer: Fe3(PO4)2
Explanation:
If this helps give me brainliest please
Select the correct answer.
Fraternal twins are formed when sperms fertilize two different eggs. What would you expect about the
twins' DNA and physical appearance?
They have similar DNA and they have identical physical appearances.
They have different DNA but exactly the same physical appearances.
They have similar DNA but environmental factors might cause changes in their physical
appearance.
They have different DNA and different physical appearance
Answer:
They have different DNA and different physical appearance
Explanation:
Because if the sperms fertilize two different eggs the DNA will be different too and if the sperms are different the physical appearance will be different also
What is the attraction between molecules within a substance called? adhesion capillary action cohesion polarity.
Answer:
cohesion
Explanation:
just got it right
Answer:
Cohesion
Explanation:
"cohesion: the attraction between molecules within a substance; the tendency of the molecules of a substance to "stick together" or group together" (edge)
which is not true for combustion reactions?
a. they always occur in the presence of oxygen
b. they produce carbon dioxide and water
c. they usually require a lot of energy to form products
d. a candle burning is an example of one
Answer:
They usually require a lot of energy to form products
Explanation:
Energy may not be reasonable source.Oxygen and hydrocarbon is enough to produce the products .Petroleum products, Carbon and hydrocarbons are also necessary
25 mL of 0.1 M lactic acid (CH, CH(OH)COOH) is titrated with 0.1 M sodium hydroxide (NaOH). The titration curve is shown. What is the approximate pKa? At the pKa, what fraction of the carboxyl group will have been converted to COO-? Express your answer as a decimal, not a percent.
The pKa and the fraction of the carboxyl group is mathematically given as
a) pH= 3.2
b) 1/2 Carboxyl group will give COO_
The carboxyl group and pKaQuestion Parameters:
25 mL of 0.1 M lactic acid (CH, CH(OH)COOH) is titrated with 0.1 M sodium hydroxide (NaOH).
Generally the equation for the pH is mathematically given as
ph = pka + log [tex]\frac{[sodium lactate]}{[lactic acid]}[/tex]
Therefore
NaOH moles = 1/2 moles of acid then [sodium lactate]
Means
NaOH moles =[lactic acid]
Therefore
pH=pKa
Hence
Volume of NaOH = 12.5 ml
Therefore
pH = pka
pH= 3.2
b)
Generally at pKa =3.2, The 1/2 Carboxyl group will give COO_
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3. Iron (III) oxide reacts with magnesium to produce magnesium oxide and iron. If 0.25
moles of magnesium are consumed, what mass of iron will be produced?
[tex]\\ \rm\longmapsto Fe_2O_3+3Mg\longrightarrow 3MgO+2Fe[/tex]
3 moles of Mg produces ,2 mol FE1mol of Mg produces 2/3=0.6mol Fe0.25mol will produce
0.25(0.6)=0.15molMass of Fe
0.15(56)=8.4gWhy does atomic radius generally increase down a group on the periodic table?.
Answer:
It becuase it normally does that and normally down the groups number of energy level increases so there a bigger and greater radius
Explanation:
what are consumers? what kind of animals are they.
Answer:
There are four types of consumers: omnivores, carnivores, herbivores and decomposers. Herbivores are living things that only eat plants to get the food and energy they need. Animals like whales, elephants, cows, pigs, rabbits, and horses are herbivores. Carnivores are living things that only eat meat.
Explanation:
5. A car travelled for 6 hours at a distance of 60 kilometers. What is the speed
of the car?
A. 10 km/h
B. 20 km/h
C. 30 km/h
D. 60 km/h
Answer:
A. 10 km/h
its the answer.......................................
The student needs 0.268 mol of zinc for a reaction. What mass of zinc in grams should the student obtain?
how many particles are in 2.0 moles of CH4
Answer: There are 4.8 x 1024 hydrogen atoms in 2.0 moles of CH4
Answer:
There are 4.8 x 1024 hydrogen atoms in 2.0 moles of CH4 .
Explanation:
How many particles are in 23 grams of carbon tetrafloride
Answer:
5.399772727e22 atoms/particles or 5.39 x 10^22 atoms/particles
Explanation:
so to convert you’re going to convert grams to moles and moles to atoms/particles:
grams to moles:
23g CF4 x 1 mol
———— = 0.26136 mol
88g (molar mass of CF4)
moles to atoms/particles:
[2.066 • 10^23 is avogadro's number and is always used to convert to atoms/particles]
0.26136 mol x 2.066 • 10^23
———————
1 mol
this gives you 5.399772727e22 atoms/particles
so 5.399772727e22 atoms/particles or 5.39 x 10^22 atoms/particles for scientific notation
hope this helps :)
Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?.
The pair of elements which are non-metals and at the same time; gases at room temperature and normal atmospheric pressure are as follows:
N2, O2, He, Ar
What is an element?An element is a substance which cannot be split into simpler units by any ordinary process.
Some elements are metalsSome are non-metalsSome are gasesSome few examples of elements include:
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
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Which state of matter is characterized by having an indefinite shape, but a definite volume?.
Answer:
A liquid
Explanation:
Liquids has an indefinite shape, which means it could change from one shape to another. For example, if you pour water into a rectangular fish tank. The shape of the liquid changes into a rectangle. Definite volume means its volume is consistent and that it is unchangeable. If you fill the rectangular fish tank with water, the volume of the water stays the same even though it changes shape.
Hope this helps.
This is all they ask
I need it.
According to Explorer Victoria, what
two things should we strive to find in
climate change stories?
Answer:
The person above me is correct
Explanation:
have a wonderful day!
What would have more thermal energy? the sun or a bad tub full of hot water? please explain your answer
The sun has more thermal energy than the bath tub full of hot water, because the sun has more heat than the bathe tub full of hot water.
What is thermal energy ?The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is performed in the process.
The object with the higher temperature has more thermal energy with two things have the same mass. A thermometer is used to determine temperature. Heat is the thermal energy that is transferred between things when their temperatures differ.
Undoubtedly, a colder item can possess more thermal energy than a warmer one. Here's one illustration, Thermal energy will be far more in a bathtub full of 100°F water than in a thimble full of 110°F water.
Thus, The sun has more thermal energy than the bath tub full of hot water.
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A chemist is studying the properties of a gas under various conditions. He observes that when the gas is at room temperature and low pressure, it behaves as an ideal gas. When the gas is cooled to 10 kelvin (–263ºC) and is placed under high pressure, however, it deviates significantly from an ideal gas. There are multiple reasons for this phenomenon. Check all of the correct reasons below. The ideal gas model assumes that gas particles experience no intermolecular attractions and these forces cause the gas to deviate from ideal behavior. At very low temperatures, gas particles move slowly. At very high pressures, gas particles are very close together. Gases placed under high pressure will undergo deposition, changing from a gas to a solid.
Gas is a state of matter that have loosely moving particles. The closeness of the gas and intermolecular forces deviates from the ideal equation.
What are the reasons for the deviation of gas?The gas consists of particles that may be too close resulting in lowering the speed that let intermolecular forces become significant at low-temperature and high pressure.
The intermolecular forces present in the gases differs from obeying the ideal gas conditions and contradicting the ideal gas rule of no collision and inter-molecular attraction with other gases.
Therefore, option A. intermolecular forces and option C. closeness of the particles are the reasons for the deviation.
Learn more about the ideal gas equation here:
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Answer:
answer in picture
Explanation:
What is the empirical formula for ribose (C5H10O5)?
A. CH10O
B. C0.5HO0.5
C. CH2O
D. C5H2O5
E. C5H10O5
What is the empirical formula for ribose (C5H10O5)?
C. CH20
When naming binary covalent compounds, the element listed first will be the one that is.
Answer:
Rule 1. The element with the lower group number is written first in the name; the element with the higher group number is written second in the name. Exception: when the compound contains oxygen and a halogen, the name of the halogen is the first word in the name.
Explanation:
When naming binary covalent compounds, the element listed first will be the one that is lower in group number.
What is covalent compound?Covalent compounds versus ionic compounds are the two groups into which chemical compounds are often divided. Ionic compounds are composed of atoms or molecules that have gained or lost electrons, causing them to become electrically charged.
Covalent or molecular compounds often emerge from the interaction of two nonmetals. By sharing electrons, the elements combine to create a compound, producing and electrically neutral molecule. When naming binary covalent compounds, the element listed first will be the one that is lower in group number.
Therefore, when naming binary covalent compounds, the element listed first will be the one that is lower in group number.
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Organism typically have more than one form of each gene if one form can mask the appearance of another form that form is considered what
Dominant
Explanation:
Meaning that particular gene is stronger than the others.
Which equation correctly describes photosynthesis? Question 5 options: water sugar oxygen → carbon dioxide chlorophyll sunlight water carbon dioxide → oxygen sugar sunlight sugar → water oxygen carbon dioxide oxygen → water sugar sunlight.
Photosynthesis is a process of food and energy production by autotrophs. Water and carbon dioxide in the presence of sunlight gives oxygen and sugar.
What are the reactants and the products of photosynthesis?Photosynthesis is a biochemical reaction that uses organic and inorganic compounds and converts the molecules with the help of biological organs and substances.
The reactant of the process includes atmospheric water vapours, carbon dioxide and the heat and energy from the sun. These reactants are used by plants and some other organisms.
The organism utilizes the reactants and produces molecules of sugar like glucose and by-product oxygen. These molecules are necessary for the metabolic and respiratory processes.
Therefore, option B. [tex]\rm sunlight + water + carbon\; dioxide \rightarrow oxygen + sugar[/tex] is the correct equation that describes photosynthesis.
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Mrs. Sikora purchases chlorpheniramine over-the-counter for her allergies. Which side effect would Mrs. Sikora likely experience
Answer:
drowsiness
Explanation:
Which of these would be a good way to test to see if palladium is a metal?
A. Bite it
B. See if it blows up
C. See if it reacts with an acid
D. Test to see if it conducts electricity
Answer:
A is the answer
Explanation:
Just guessing.
PLEASE HELP!! FAST!!
Explanation:mok in this we learning about sum multiplication on a chart but it to small but the answer 52
(2 KClO3 (s) → 2 KCl (s) + 3 O2 (g) ) If 165 mL of oxygen is produced at 30.0 °C and 90.0 kPa, what mass of KClO3 was decomposed?
Taking into account the reaction stoichiometry and ideal gas law, 0.48144 grams of KClO₃ was decomposed.
Reaction stoichiometryIn first place, the balanced reaction is:
2 KClO₃ → 2 KCl + 3 O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
KClO₃: 2 moles KCl: 2 moles O₂: 3 molesThe molar mass of the compounds is:
KClO₃: 122.45 g/mole KCl: 74.45 g/moleO₂: 32 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
KClO₃: 2 moles ×122.45 g/mole= 244.8 grams KCl: 2 moles ×74.45 g/mole= 148.9 gramsO₂: 3 moles ×32 g/mole= 96 gramsIdeal gas lawThe pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that the gas occupies.T is the temperature of the gas.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances. n is the number of moles of the gas. Number of O₂ produced.165 mL of oxygen is produced at 30.0 °C and 90.0 kPa. This is, you know:
P= 90 kPa= 0.888231 atm (being 101.325 kPa= 1 atm)V= 165 mL= 0.165 L (being 1000 mL= 1 L)n= ?R= 0.082 [tex]\frac{atmL}{molK}[/tex]T= 30 C= 303 K (being 0 C= 273 K)Replacing in the ideal gas law:
0.888231 atm× 0.165 L = n× 0.082 [tex]\frac{atmL}{molK}[/tex]× 303 K
Solving:
n= (0.888231 atm× 0.165 L)÷ (0.082 [tex]\frac{atmL}{molK}[/tex]× 303 K)
n= 0.0059 moles
Finally, 0.0059 moles of oxygen is produced at 30 °C and 90 kPa.
Mass of KClO₃ requiredThe following rule of three can be applied: If by stoichiometry of the reaction 3 moles of O₂ are produced by 244.8 grams of KClO₃, 0.0059 moles of O₂ are produced by how much mass of KClO₃?
[tex]mass of KClO_{3}= \frac{0.0059 moles of O_{2}x 244.8 grams of KClO_{3}}{3 moles of O_{2}}[/tex]
mass of KClO₃= 0.48144 grams
Finally, 0.48144 grams of KClO₃ was decomposed.
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Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?
A) 77.9 amu.
B) 80.0 amu.
C) 80.1 amu.
D) 80.9 amu.
E) 88.9 amu.
The mass of an atom of the second bromine isotope is 80.9amu
Calculation of Mass of an atomic isotope
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Now given that
Atomic mass of bromine = 79.9 amuPercent abundance of 1st isotope = 50.3%Atomic mass of 1st isotope = 78.9 amuPercent abundance of 2nd isotope = 100-50.3%=49.7%Atomic mass of 2nd isotope =?Plugging in values, we have that
79.9= (50.3×78.9)+(49.7× ?) /100
79.9x 100= (50.3×78.9)+(49.7× ?) /100
7990= 3968.7+(49.7x)
7990- 3968.7=49.7x
4021.3= 49.7x
x=4021.3/49.7
x=80.9amu
Therefore, the mass of an atom of the second bromine isotope is 80.9amu.
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1. Choose the correct answer from the given alternative. 1. A blood sample analysis showed that a total of 0.0000036g lead. Express it in micrograms? A. 0.0036 micro gram B. 0.036 micro grams C. 0.36 micro grams D. 3.6 micrograms.
Answer:
3.6 micrograms answers (c)
Explanation:
What is the use of the set-up in the lab?
Answer:
Laboratory equipment is generally used to either perform an experiment or to take measurements and gather data. Larger or more sophisticated equipment is generally called a scientific instrument.
HELP?? Read each statement and determine which characteristic each person is demonstrating. THE OPTIONS TO FILL IN THE "___" ARE, [Creative], [Curious], [Ethical], [Skeptical]
_____ Andrew asks questions about how the volcanoes in Hawaii were formed.
_____ Robyn sees a magazine for kids at the grocery store with an article about a new fossil discovery. So, she searches scientific journals that support the content of the article.
____ Maggie uses her knowledge of physics to create a simple machine for a science fair project.
____ Shaun is testing a new medication on animal subjects. He is sure to follow all guidelines for appropriate care and testing.
Answer:
1. curious
2. curious
3. creative
4. Ethical
Explanation:
I am not sure but I hope they are correct! :)
Answer:
Curious.)
Andrew asks questions about how the volcanoes in Hawaii were formed.
Skeptical.)
Robyn sees a magazine for kids at the grocery store with an article about a new fossil discovery. So, she searches scientific journals that support the content of the article.
Creative.)
Maggie uses her knowledge of physics to create a simple machine for a science fair project.
Ethical.)
Shaun is testing a new medication on animal subjects. He is sure to follow all guidelines for appropriate care and testing.
Explanation:
Have a great rest of your day
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