If the mass of the compound is 48 grams, that would mean 1 mole of that compound would also he 48 grams
Comment
I'm going to use rounded numbers to calculate the molar mass of water.
Water Molar Mass
- 2H = 2 * 1 = 2
- 1O = 1 * 16 = 16
- Molar Mass = 18 grams / mole
Moles of water
- given mass = 9.176 grams
- Molar Mass = 18 grams / mole
- moles = ??
Formula
moles = given mass / molar mass
moles = 9.176 / 18
moles 0.5098 Answer
The answer to question 1 is B and to question 2 is A
<u>0.4 mol of </u> molecules has larger mass than 0.4 mol of O atoms
<h3>What are molecules?</h3>
The smallest component of a substance that possesses both its chemical and physical characteristics. One or more atoms make up molecules.
They may have the same atoms (for example, an oxygen molecule has two oxygen atoms) or different atoms if they have more than one (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules like DNA and proteins can include thousands of atoms.
the lowest recognised unit into which a pure material can be divided while retaining its chemical makeup and attributes is made up of two or more atoms.
Learn more about Molecules
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