# How do you convert between the mass and the number of moles of a substance?

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## How do you convert between the mass and the number of moles of a substance quizlet?

How do you convert the mass of a substance to the number of moles of the substance? Use the molar mass of an element or compound to convert between the mass of a substance and the moles of the substance.

## How do you convert between the volume of a gas at STP and the number of moles of the gas?

Molar volume at STP can be used to convert from moles to gas volume and from gas volume to moles. The equality of 1mol=22.4L is the basis for the conversion factor.

## What is the relationship between mole and Avogadro number?

Avogadro’s number is a very important relationship to remember: 1 mole = 6.022×1023 6.022 × 10 23 atoms, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro’s number. To convert from atoms to moles, divide the atom amount by Avogadro’s number (or multiply by its reciprocal).

## How do you convert moles to molar mass?

Converting Mass to Number of Moles

Since the molar mass of NaOH is 40 g/mol, we can divide the 90 g of NaOH by the molar mass (40 g/mol) to find the moles of NaOH. This the same as multiplying by the reciprocal of 40 g/mol.

## Why do we convert mass to moles?

Answer: Big, because atoms and molecules are way too small to count, so we mass large numbers of them instead, and use molar mass to convert to the NUMBER of moles of them.

## How do you do mole conversions?

Mole Conversion Tips for Chemistry

1. Converting from mass (grams) to moles: Divide your initial mass by the molar mass of the compound as determined by the periodic table.
2. Converting from moles to mass (grams): Multiply your initial mole value by the molar mass of the compound as determined by the periodic table.

## How do you convert grams to moles of compounds?

Since moles = grams of compound/the molar mass, to find the mass, you will need to do mass = molar mass x molarity. How do I convert moles to grams? Find the molar mass first, then multiply it to the given amount of moles.

## How do you calculate mass at STP?

The formula D= M/V is used at STP with M being equal to the molar mass and V being molar volume of a gas (22.4 liter/mole). Recall Avagadro’s Principle for Gases (1811)- equal volumes of all gases at the same condition contain the same number of molecules. Molar mass can also be solved based on given information.

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## How do you convert the volume of a gas at STP?

It can be written as: V = nRT/P. “P” is pressure, “V” is volume, n is the number of moles of a gas, “R” is the molar gas constant and “T” is temperature. Record the molar gas constant “R”. R = 8.314472 J/mole x K.

## What is 1l in grams?

How Many Grams are in a Liter?

Volume in Liters: Weight in Grams of:
Water Granulated Sugar
1 l 1,000 g 700 g
2 l 2,000 g 1,400 g
3 l 3,000 g 2,100 g