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2.) Calculate the number of Hydrogen atoms in 5.4 moles of Hydrogen.
a.9.0 x 10-24 Hydrogen atoms.
b.3.3 x 1024 Hydrogen atoms.
c.3.3 x 10-22 Hydrogen atoms.
d.9.0 x 1022 Hydrogen atoms.
3.) Calculate the moles of water molecules in 8.7 x 1022 molecules of water.
a.5.2 mol H2O.
b.1.4 x 1045 mol H2O.
c.5.2 x 1046 mol H2O.
d.0.14 mol H2O.
4.) Sucrose, common table sugar, has the molecular formula of C12H22O11.
Calculate the moles of carbon in 0.581 moles of sucrose.
a.20.7 mol C.
b.6.97 mol C.
c.7.23 x 1024 mol C.
d.1.99 x 10-23 mol C.
5.) Sucrose, common table sugar, has the molecular formula of C12H22O11.
Calculate the atoms of oxygen in 0.581 moles of sucrose.
a.6.02 x 1023 O atoms.
b.3.50 x 1023 O atoms.
c.6.4 O atoms.
d.3.85 x 1024 O atoms.
6.) Ammonium Phosphate, (NH4)3PO4, is a possible component in fertilizer.
How many moles of Nitrogen are in 4.6 moles of ammonium Phosphate?
a.2.8 x 1024 mol N.
b.8.3 x 1024 mol N.
c.14 mol N.
d.4.6 mol N.
7.) Ammonium Phosphate, (NH4)3PO4, is a possible component in fertilizer.
How many atoms of Hydrogen are in 4.6 moles of ammonium Phosphate?
a.3.3 x 1025 H atoms.
b.1.1 x 1025 H atoms.
c.8.3 x 1024 H atoms.
d.6.0 x 1023 H atoms.
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2 - b
3 - d
4 - b
5 - d
6- c
7 - a
Step-by-step explanation
2 - 5.4 moles of Hydrogen
1 mole = 6.023 * 1023 atoms
so 5.4 moles of Hydrogen will have = 5.4 * 6.023 * 1023 atoms = 3.3 x 1024 Hydrogen atoms
3- 8.7 x 1022 molecules of water
1 mole of water = 6.023 * 1023 molecules of water
so mole of water = 8.7 x 1022 / 6.023 * 1023 = 0.14 mol H2O
4- 0.581 moles of C12H22O11.
1 mole of C12H22O11 = 12 carbon
mole of carbon = 0.581 * 12 = 6.97
5- 0.581 moles of C12H22O11.
number of oxygen atom in 1 mole of C12H22O11 = 11
1 mole = 6.023 * 1023 atoms
number of O atoms = 0.581 * 11 * 6.023 * 1023 atoms = 3.85 x 1024 O atoms.
6 - 4.6 moles of Ammonium Phosphate, (NH4)3PO4
1 mole of Ammonium Phosphate, (NH4)3PO4 = 3 mole of Nitrogen
mole of N = 4.6 mole * 3 * = 14 mole
7 - 4.6 moles of Ammonium Phosphate, (NH4)3PO4
1 mole of Ammonium Phosphate, (NH4)3PO4 = 12 mole of Hydrogen
1 mole = 6.023 * 1023 atoms
number of atoms of Hydrogen = 4.6 * 12 * 6.023 * 1023 atoms = 3.3 x 1025 H atoms.
