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Molecular Mass

Molecular mass measures the mass of a molecule. It is measured by adding together the atomic masses of atoms the molecule is made of.

617 Questions

What happens to the volume of the gas when the number of moles is doubled?

The ideal Gas Law states the following:

pV=nRT

p=pressure [pa]

V=volume [m³]

n=number of moles

R=constant

T=temperature [K]

So, if you multiply the number of moles by 2, and all the other variables are not changed, your volume will also be multiplied by 2.

How many moles of hydrochloric acid must be dissolved in 2.50 L of water to make a 0.19 M solution?

Hydrochloric acid is a mixture water: acid with different concentrations.
For hydrogen chloride (HCl) you need 0,475 moles.

How many moles are 4.12 grams aluminum sulfate?

4,12 grams aluminum sulfate is equivalent to 0,012 moles (for the anhydrous salt).

How do you go from moles to ions?

Mole is the SI unit for the amount of substance.
Ion is related to a elctrical charged atom or group of atoms.
1 mole of ions is equal to 6,022 140 857.10e23 ions.

Is the molecular mass of candle wax less than 100?

No, the range is about 282-562 molecular mass for candle wax.

What is the mass of a house key in grams?

A house key will vary in weight depending on the metal used and the size of the key. On average, a house key weighs about four ounces.