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10)One drop of water weighs 0.040 g. How many molecules are there in one drop, taking the gram formula mass (molar mass) of water to be 18 g/mol? 11)lsopentyl acetate, C7H1402, the compound responsible for the scent of bananas, can be produced commercially.
Mole Calculation Practice Worksheet. Answer the following questions: 1) How many moles are in 25 grams of water? 2) How many grams are in 4.5 moles of Li2O? 3) How many molecules are in 23 moles of oxygen? 4) How many moles are in 3.4 x 1023 molecules of H2SO4? 5) How many molecules are in 25 grams of NH3?
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.
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.
EXAMPLE: How many molecules of water are there in 3.00 moles of water? 3.00 moles x 6.02 x 10 23 molecules = 1.81 x 10 24 molecules 1 mole
Mole Calculation Worksheet. 1) How many moles are in 40.0 grams of water? 2) How many grams are in 3.7 moles of Na2O? 3) How many atoms are in 14 moles of cadmium? 4) How many moles are in 4.3 x 1022 molecules of H3PO4? 5) How many molecules are in 48.0 grams of NaOH?
Mole Conversions Worksheet #1 1. Mole –> Mass Conversions – using molar mass of each substance, convert the following quantities. a. 10.0 mol Cr f. 0.160 mol H 2 O b. 3.32 mol K g. 5.08 mol Ca(NO 3) 2 c. 2.20 x 10–3 mol Sn h. 15.0 mol H 2 SO 4 d. 0.720 mol Be i. 4.52 x 10–5 mol C 2 H 4 e. 2.40 mol N 2 j. 0.0112 mol K 2 CO 3 2.
