Practice Molar Mass in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The mass in grams of exactly one mole of a substance, calculated by summing the atomic masses of all atoms in the chemical formula.
How much one mole weighs. For elements, it's the number on the periodic table.
Showing a random 20 of 50 problems.
Example 1
challenge of an oxide contains mol. If O=16, what is the atomic mass of M?
Example 2
mediumWhat is the molar mass of ? (Ca=40, O=16, H=1)
Example 3
easyWhat is the molar mass of ? (C=12, O=16)
Example 4
easyHow many moles are in of ? ()
Example 5
mediumHow many grams of are in 0.5 mol? ()
Example 6
hardA compound has formula with molar mass . (O = 16) Find the atomic mass of X.
Example 7
hardCalculate the molar mass of hydrated copper sulfate . (Cu = 63.5, S = 32, O = 16, H = 1)
Example 8
mediumWhat is the molar mass of ? (H=1, S=32, O=16)
Example 9
easyCalculate the molar mass of glucose ().
Example 10
hardHow many grams of oxygen are in of ? (, O = 16)
Example 11
easyWhat is the molar mass of ? (Mg = 24.3, O = 16.0)
Example 12
hard of an unknown gas weighs . Identify the gas if it is a common diatomic.
Example 13
easyWhat is the molar mass of ? (Na=23, Cl=35.5)
Example 14
easyWhat is the molar mass of ? (O=16)
Example 15
easyWhat is the molar mass of water ? (H=1, O=16)
Example 16
easyCalculate the molar mass of sulfuric acid (). (H = 1.008, S = 32.07, O = 16.00)
Example 17
challengeA compound is 2 mol and . If it contains only H and O in a 2:1 atom ratio, what is it?
Example 18
hardWhat mass of contains of oxygen? (K = 39, Cl = 35.5, O = 16)
Example 19
easyHow many moles are in of ? ()
Example 20
mediumWhat is the molar mass of ? (N=14, H=1, S=32, O=16)