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QR Challenge: Mole practice

QuestionAnswer
1) What is a mole?6.02x10^23 particles of anything
2) 1 mole = __________ atoms6.02x10^23 atoms
3) 1 mol of zn = ____ mole of Au1 mole
4) How many moles are in 1.29 x 10^24 molecules of HF?2.14 moles H atoms
5) How many moles are in 7.36 x 10^24 atoms of Mg? 12.2 moles Mg
6) How many moles are in 3.28 x 10^23 NaCl molecules?0.545 moles
7) How many molecules are present in 3.14 mol of H2O? 1.89x10^24 molecules
8) How many molecules are present in 2.79 moles of nitrogen trihydride?1.68x10^23 molecules
9) How many atoms are present in 0.00906 moles of silver?5.45x10^21 atoms
10)How many atoms are in a 3.56 g sample of Cu?3.37 x 10^22 Cu atoms
11) How many g of CaCO3 are present in a sample if there are 4.52 x 10^24 atoms of carbon in that sample?751 g CaCO3
12)Find the formula mass of KMnO4 158.00 g/mol
13)Find the formula mass of Mg3(PO4)2262.79 g/mol
14)Find the molecular mass of C12H22O11342.23 g/mol
15) How many moles are in 17.7 g of KMnO4? 0.112 mol KMnO4
16) How many moles are in 41.2 g of Mg3(PO4)2?1.57 mol Mg3(PO4)2
17) How many moles are in 26.9 g of C2H8?0.841 moles
18) How many moles are 1.98 x 10^24 molecules C2H8?3.29 moles
19) What is the mass of 1.98 x 10^24 molecules C2H8?105g
20)Find the percentage composition of oxygen in KMnO4 40.48% O
21) Find the percentage composition of potassium in KMnO424.75% K
22) Find the percentage composition of phosphorus in Mg3(PO4)223.57% P
23) Find the percentage composition of magnesium in Mg3(PO4)227.75% Mg
24) Find the percentage composition of oxygen in Mg3(PO4)248.68% O
25) Which of the following is not an empirical formula: C2H3, CH4O6, H2O, C4H6C4H6
26) What is the name of BaBr2 2H2O?
27) What is the molar mass of BaBr2 2H2O?
28) what are the units of molar mass? g/mol
29) How many grams are in 3.89 moles of zinc chloride?530 grams
30) How many grams are in 0.504 moles of copper (I) nitride?102 grams
32) How many grams are 5.69x10^25 molecules of phosphorus trichloride?12979 grams
33) How many grams are 24700 atoms of tin?4.87x10^-18 grams
34) How many molecules are in 0.589 g of aluminum sulfate?1.04x10^21 molecules

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