How many atoms are in 4h2o?

Answer 1

Atomic Mass- 1.01

Formula- grams × (6.02 × 1023) / atomic mass = number of atoms

1.00 grams H × (6.02 × 1023) / 1.01 grams = 5.96 × 1023 atoms of hydrogen

Answer 2

100 grams H2O (1 mole H2O/18.016 grams)(6.022 X 1023/1 mole H2O)

= 3.34 X 1024 molecules of water

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Of course you see how many oxygen atoms in that much water.

Answer 3

1.5 x 10^23 molecules H2O

First determine how many moles are in 4.4 g of H2O, divide 4.4 g by the molar mass of H2O, 18.015 g/mol. Divide by multiplying by the inverse of the molar mass. Then multiple the moles H2O by 6.022 x 10^23 molecules/mol.

4.4 g H2O x 1mol H2O/18.015 g H2O = 0.2442 mol H2O

0.2442 mol H2O x (6.022 x 10^23 molecules H2O)/(1mol H2O) = 1.5 x 10^23 molecules H2O
rounded to two significant figures

Answer 4

4 g (6.02 x 1023 atoms / 1.01 g) = 2.38 x 1024atoms

Answer 5

mass percent of H in H2O: 11.19%

4.9g x .1119 = 0.5483gH

0.5483gH x (1molH/1.0079gH) x (6.022E23/1molH) = 3.3E23 (3.275951x10^23)

Answer 6

4 moles of hydrogen contain 48,177126856.1023 atoms.

Answer 7

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