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Mole Calculation Practice Worksheet Answer the following questions: 1) How many moles are in 25.0 grams of water? 2) How many grams are in 4.500 moles of Li 2O? 3) How many molecules are in 23.0 moles of oxygen? 4) How many moles are in 3.4 x 10 23 molecules of H 2SO 4? 5) How many molecules are in 25.0 grams of NH 3?
There are three definitions (equalities) of mole. They are: 1 mole = 6.02 x 1023 particles. 1 mole = molar mass (could be atomic mass from periodic table or molecular mass) 1 mole = 22.4 L of a gas at STP (You do not need to worry about this yet) Each definition can be written as a set of two conversion factors.
1. Acetic acid is more commonly known as vinegar and has the formula CH3COOH. a. What is the molar mass of CH3COOH? b. How many moles are in 5.6 grams of acetic acid? 2. How many grams are in 0.890 moles of copper (I) bromide? 3. Calculate the molar mass of calcium bromide. moles of lithium atoms are in 3.75 x 1012 lithium atoms? 5.
3 1 mol NH 3 3. 2.0 × 1012 mol H 2SO 4 × 98.1 g H 2SO 4 × 1 kg H 2SO 4 × 1 tonne H 2SO 4 1 mol H 2SO 4 1000 g H 2SO 4 1000 g H 2SO 4 = 2.0 × 108 tonnes H 2SO 4 Practice Problems — Converting Mass to Moles, p. 120 1. 62.2 g Au × 1 mol Au = 0.316 mol Au 197.0 g Au 2. 3.88 g CO 2 × 1 mol CO 2 = 0.0882 mol CO 2 44.0 g CO 2 3.
Using mole calculations to solve problems. Learning objectives. 1 Recall how to use simple mole calculations to calculate masses, moles, or relative. formula masses. 2 Practice rearranging equations. 3 Develop confidence in decoding complex word problems. Introduction.
Moles, Molecules, and Grams Worksheet -- Answer Key 23 How many molecules are there in 24 grams of FeF3? 1.28 x 10 molecules .
answer. The only new concept we will introduce in this unit is the idea of a mole. A mole is a quantity of matter that we use for conversion purposes. We can convert from grams to moles, liters to moles (for gases), and atoms or molecules to moles.
