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Vladimir [108]
3 years ago
15

7. Which of these is not matter? a. a cloud c. sunshine b. your hair d. the sun

Chemistry
1 answer:
PilotLPTM [1.2K]3 years ago
3 0
Hair ????????????????!?????
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What is the concentration of ammonium ions in a 0.100 M solution of (NH3)2SO4?
adelina 88 [10]
<span>ammonium sulphate give 2 moles of ammonium ions
so conc. of ammonium ions =2*0.100=0.200 </span>
3 0
3 years ago
An organism contains chloroplasts in its cells which allows it to make its own food. What Kingdom is it in?
Alina [70]

Answer:

Plantae. Plants are multicellular and most don't move, although gametes of some plants move using cilia or flagella. Organelles including nucleus, chloroplasts are present, and cell walls are present. Nutrients are acquired by photosynthesis (they all require sunlight).

8 0
3 years ago
What is the molar volume of a gas at standard temperature and pressure?
Andrej [43]

Answer: The molar volume of any gas at standard pressure and standard temperature is 22.4 liters per mole.

Explanation:The ideal gas law is PV=nRT

P is pressure and if we consider standard pressure, then we have 1.00 atm.

V is volume and that is what we are trying to solve.

n is the number of moles, which is 1.00 moles since we are trying to determine the volume of a gas in one mole.

R is the ideal gas constant which equals

0.0821 (Liters x atmospheres)/(mole x kelvin)

T is the standard temperature which is 273 kelvin.

Rearrange the equation to solve for volume.

V = nRT/P

V = (1.00 mol)(0.0821 L atm/mol K)(273 K)/ 1.00 atm

V = 22.4 L

4 0
3 years ago
Charge of an electron
Zolol [24]

Answer: The charge on one electron is –1.6 x 10–19 coulomb.

Hope this helps!

3 0
3 years ago
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The rate of a reaction is measured by how fast a reactant is used up to how fast a product is formed.
bezimeni [28]
A. True.

Very true. The quicker or slower the reactants are used up the faster or slower the rate of reaction, and the faster or slower the products are formed, the faster or slower the rate of reaction.
5 0
4 years ago
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