Answer:
1. 95.7 ppm
2. 6.67 ppm
Explanation:
Podemos pensar la denominación ppm como partes por millón, es un tipo de unidad que define concentración de solutos en una solución.
ppm = μg/g o si lo queremos ver en volumen, μg/mL
Quiere decir microgramos de soluto en 1 g de solución o mL de solución.
Ej 1. En primer lugar convertimos los moles de KNO₃ a gramos
0.00071 mol . 101.1 g/mol = 0.071781 g
Si pasamos los gramos a μg → 0.071781 g . 1000000 μg/ 1g = 71781 μg
Dividimos 71781 μg /750 ml = 95.7 ppm
Ej 2. Convertimos los mg a μg → 4 mg . 1000 μg/ 1 mg = 4000 μg
Ahora dividimos: 4000 μg /600 ml = 6.67 ppm
The partial symbol for a particular ion is 26M2+ What are the number of electrons contained in one ion
Answer:
24
Explanation:
26-2=24 because when an atoms loses 2 electrons it gains 2+ charge
Each electron can be represented by 4 quantum numbers. The two electrons in the outermost level of strontium are designated at 5 s . How many quantum numbers would these two electrons have in common
Explanation:
They are both in shell 5 and subshell s.
Since s only has 1 orbital, they also have the same orbital number.
But they have different magnetic spins.
Hence 3 out of 4 quantum numbers are in common.
A student is asked to determine the chemical formula for the compound Barium
chloride. When writing the chemical formula, what question will the student need to
ask to determine the correct formula?
What period does barium belong to?
Are barium and chlorine a metal and nonmetal?
What is the state of matter of each element that comprises the final formula?
What are the charges of each atom?
Answer:
Are barium and chlorine a metal and nonmetal?
Explanation:
I had the same question, and my class reviewed the test and this was the answer to this question.
what happens when a covalent bond vs. an ionic bond is formed?
Explanation:
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. ... A covalent bond involves a pair of electrons being shared between atoms. Atoms form covalent bonds in order to reach a more stable state.
A 30 gram ball is at rest. Next, a force pushes the ball to the north for 2.5 seconds and the ball accelerates for a rate of 0,70 m/s/s. How fast is the ball going after the 2.5 seconds of acceleration? For credit, who work in detail
Answer:
1.75m/s or 6.3km/hr
Explanation:
here,
acceleration (a) = 0.7m/s^2
mass (m) = 30g
time (t) = 2.5s
initial velocity (u) = 0m/s
final velocity (v) = ?
now,
v = u + at
or, v = 0 + 0.7 * 2.5
hence, Final velocity (v) = 1.75 m/s
if u want to convert to km/hr
then,
1.75 * 3.6 (we know that 1m/s = 3.6km/hr)
= 6.3km/hr
Your explanation should include a claim, evidence, and scientific reasoning based on the data provided and the process of photosynthesis.
Answer:
yuh 100% true dude
Explanation:
...............
The only nonmetal in Group 14 is
A carbon.
B. oxygen.
C. nitrogen.
D. fluorine.
Answer:
carbon
Explanation:
i just googled it
What causes hot air to rise from the pavement on a hot summer day?
Answer:
During the daytime, when the sunlight hits the land surface, it is absorbed, causing the surface to heat up (think about how hot pavement gets on a sunny, summer day). The hot surface then heats up the air near the surface, causing it to rise
Explanation:
Answer:
When sunlight reaches the ground surface during the day, it is absorbed, allowing the surface to heat up (think about how hot pavement gets on a sunny, summer day). The air near the hot surface is then heated, allowing it to rise.
Explanation:
What is the significance of the color of the light observed in a line spectrum?
Which change will produce a new substance
Answer:
Chemical change
Explanation:
Because it will be 2 mixtures of each substances making it 1 substance, and 1 change.
What is the mass of a lead block that has a volume of 30 mL?
O 3.39 grams
O .377 mL
O 265 mL
O 339 grams
Answer:
d
Explanation:
i think it's d, but I'm not sure. my answer is a little different but maybe i used a different number for the density of lead (11.35g/cc)
Question 12 (100 points)
(03.04 LCO.
Which of the following is a compound? (100 points) A Cl2
B H20
C He
D H2
Answer:
H20 is a compound so it's the answer
Explanation:
Have a good day
Answer:
d
Explanation:
Which of these are an atom's valence electrons?
Answer:
The Outer-most Electron shell contains the valence electrons.
Bonus Info:
Valence Electrons are used by atoms to make ionic bonds.
Answer:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.
Explanation:
ur welcome
i was doing this in school and i watched a video
3. (10 Points) Write a double replacement reaction where one of the products is
copper (11) oxide. Include the states of matter for each of the reactants and
products.
Answer:
Up to now, we have presented chemical reactions as a topic, but we have not ... A single-replacement reaction is a chemical reaction in which one element is ... single-replacement reactions will occur between two given reactants. This is ... Use the activity series to predict the products, if any, of each equation.
Explanation:
What is a control group?
Answer:
A control group is someone who takes control over something so a tyrant or a dictator.
Explanation:
If this isnt what your looking for let me know, there wasnt alot of context.
Answer: a group that helps you control something
Explanation: like a surport group but for addictions maybe
What type of force is demonstrated in the image below?
Answer:an unbalanced force
Explanation: because the forces are uneven one is stronger
Help Please I'll mark Brainiest!
Write three observations that could help you identify this organism.
Answer:
the unidentified animal looked like a slug, it looked like it lives or can be in water, the body of the unidentified animal is purple, it seems to have an orange spikes coming out of it's backs.
Which of the following statements are true of indirect disease-causing factors? Check all that apply.
Indirect causes of disease include genetics, lifestyle, and environmental factors.
Indirect causes of disease are always passed down from parents.
Indirect causes of disease can trigger genes, leading to types of cancer.
Indirect causes of disease include infections and pathogens
Answer:indirect causes of disease include genetics, lifestyle, and environmental factors
Explanation:
The indirect disease -causing factors include some genetic factors, infections from other persons etc. Thus options A ,C and D are correct.
What are indirect disease -causing factors?There are some factors such as infection from other people make us infected also not by directly originating in ourselves. For example, passive smokers may have respiratory disorders.
Some disease can be generated indirectly from the gene types inherited from parents. These may cause imperfect gene coding and some times trigger cancer.
Infections such as flu, cold, different types of fevers, viral and bacterial infection are able to spread and might affect other two-three people.
Therefore, indirect disease -causing factors includes genetic disorders inherited from parents and infections from environment and hence options A, C and D are correct options.
To learn more about disease -causing factors, refer the link below:
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most abundant noble gas in the air
Answer:
Argon
Explanation:
I'm pretty sure it's argon.
in an experiment 3.5g of element A reacted with 4.0g of element G to form a compound Calculate the empirical formula for this compound
Additional information
Relative atomic mass(Ar) : A=7, G=16
The empirical formula : A₂G
Further explanationGiven
3.5g of element A
4.0g of element G
Required
the empirical formula for this compound
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
The empirical formula also shows the simplest mole ratio of the constituent elements of the compound
mol of element A :
[tex]\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{3.5}{7}=0.5[/tex]
mol of element G :
[tex]\tt mol=\dfrac{4}{16}=0.25[/tex]
mol ratio A : G = 0.5 : 0.25 = 2 : 1
I can be found in the 4th period on the periodic table.
Vanadium (V)
Zirconium (Zr)
Carbon (C)
Beryllium (Be)
Vanadium (V)
Vanadium is the only one in the 4th period here so
What is mass movement give examples
SOMEONE HELP ME PLEASE I’LL GIVE BRAINLY
Chemical change
physical change
Answer:
Chemical
Explanation:
1.How ls an organism organized from the smallest to largest structure?
O Tisaue, Cell, Organ aystem, Organism, Organ
O Cell, Tisaue, Organ, Organ ayatem, Organism
O Cell, Tisaue, Organ aystem, Organ, Organism
O Cell, Organ, Tiasue, Organ aystem, Organiam
Answer:
Cell, Tissue, Organ, Organ system, Organism
dicarbon heptasulfide chemical formula
Answer:
C2S7
Explanation:
To solve this we must be knowing each and every concept related to chemical formula. Therefore, the chemical formula for the given molecule dicarbon hepta sulfide is C[tex]_2[/tex]S[tex]_7[/tex].
What is chemical formula?A chemical formula is a scientific notation that uses atomic symbol and numerical subscripts to represent the number and types of elements contained in a molecule. A chemical formula seems to be a concise written description of an existing three-dimensional molecule.
A chemical formula characterizes a material to the atomic level. There are three sorts of chemical formulas: empirical, molecular, and structural. The chemical formula for the given molecule dicarbon hepta sulfide is C[tex]_2[/tex]S[tex]_7[/tex].
Therefore, the chemical formula for the given molecule dicarbon hepta sulfide is C[tex]_2[/tex]S[tex]_7[/tex].
To know more about chemical formula, here:
https://brainly.com/question/29031056
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How are ocean waves different from sound waves?
a. ocean waves are longitudinal waves, sound waves are transverse waves
b. ocean waves are electromagnetic waves, sound waves are mechanical waves
c. ocean waves are mechanical waves, sound waves are electromagnetic waves
d. ocean waves are transverse waves, sound waves are longitudinal waves
Answer:
C
Explanation:
Ocean waves are something we can see. We cannot see Sound waves.
Answer:
the correct answer is B
Explanation:
Sound waves are longitudinal waves.
help meeeeeeeeeeeee its impossibleeeeee
Answer:
Nice! If only....
Explanation:
Answer:
omg lol what even is this
Cylinder A and Cylinder B are sealed, rigid cylinders with movable pistons. Each cylinder contains 500. milliliters of a gas sample at 101.3 kPa and 298 K. Cylinder A contains H2 and cylinder B contains N2. Explain, in terms of collisions between gas molecules and the walls of the container, why pushing the movable piston farther into cylinder B at constant temperature would increase the pressure of the N2 gas.
Answer:
The pressure of N₂ gas in cylinder B when compressed at constant temperature increases due to the increase in the frequency of collision between the gas molecules with themselves and with the wall of their container caused by a decrease in volume of the container.
Explanation:
Gas helps to explain the behavior of gases when one or more of either temperature, volume or pressure is varying while the other variables are kept constant.
In the gas cylinder B, the temperature of the given mass of gas is kept constant, however, the volume is decreased by pushing the movable piston farther into the cylinder. According to the gas law by Robert Boyle, the volume of a given mass of gas is inversely proportional to its pressure at constant temperature. This increase in pressure is due to the increase in the frequency of collision between the gas molecules with themselves and with the wall of their container caused by a decrease in volume of the container. As the cylinder becomes smaller, the gas molecules which were spread out further become more packed closely together, therefore, their frequency of collision increases building up pressure in the process.
In terms of collisions between gas molecules and the walls of the container, the reason why pushing the movable piston farther into cylinder B at constant temperature would increase the pressure of the N2 gas is due to the fact that;
The movement of the piston farther into the cylinder would lead to an increase in the number of collisions per unit area between the N2(nitrogen) molecules and the internal walls of the cylinder. The movement described above would lead to creation of greater pressure because the more the collisions, the higher the pressure.The image showing the two cylinders are missing and so i have attached it.
Read more at; https://brainly.com/question/24393357
describe the density of a golf ball
Answer:
the nominal density of a golf ball is to be approximately 0.65 ounces per cubic inch.
Explanation:
Using the electronegativity chart below, determine which compound would have the highest polarization
A. Li-O
B. B-F
C. H-CI
D. Be-Br
Answer:
A. Li-O
Explanation:
The highest polarization will occur between the atoms of Li-O because they have the most electronegativity difference between them.
Polarization occurs when there is a separation of charge between the atoms of heteronuclear molecules.
The electronegativity gives the tendency for an atom to attract the electrons within the bond pair to itself.
To know the atom with most polarization, it has to be one with highest electronegativity difference. Li and O have the highest difference. Also, since the bond is between a metal and non-metal, it is obviously the most polarized.