How many total ions are there in 44 moles of NasPOt? 2.65 times 10^25 ions 7.95

Question

How many total ions are there in 44 moles of NasPOt? 2.65 times 10^25 ions 7.95 times 10^25 ions 1.06 times 10^26 ions 2.12 times 10^26 ions A small glass of water contains 75.96 grams of water. How many moles of hydrogen atoms are in this glass of water? 4.22 8.44 5.08 2.54 times 10^2 A solution is known to contain 28% phosphoric acid by mass. This means that The density of this solution is 2.8 g/ml. 1 mL of this solution contains 28 g of phosphoric acid 100 g of this solution contains 28 g of phosphoric acid 1 L of this solution has a mass of 28 g e. 1 L of this solution contains 28 mL of phosphoric acid B3 T.

Explanation / Answer

1.

Na3PO4 = 3 ions of Na+ and 1 ion of PO4-3

total ions = 4

1 mol = 4 ions

1 mol = 6.022*10^23 molecules

44 mol = 44*4*6.022*10^23 = 1.059872*10^26

2.

75.96 g of H2O

mol ofH

mol of water = mass/MW = 75.96/18 = 4.22 mol

1 mol = 2 mol of H

then

4.22 mol o f water = 4.22*2 =8.44 mol of H

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