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DaniilM [7]
2 years ago
9

Pls help! I’m not very smart so please explain it to me!

Chemistry
2 answers:
Fantom [35]2 years ago
3 0

Answer:

3.01  x 10²¹

Explanation:

Molar mass of h₂o =18.01528 g/mol.

it means 1 mole h₂o=18.01528 g .....(1)

1 mole = 6.022 × 10^23 molecules

so,

1 mole  h₂o =6.022 × 10^23 molecules=18.01528 g  [from 01]

now,

18.01528 g h₂o has= 6.022 × 10^23 molecules

9.00x10⁻² g h₂o has= ( 6.022 × 10^23 x 9.00x10⁻² ) /18.01528 molecules

                                  =3.008 x 10²¹ molecules

                                  ≈ 3.01  x 10²¹ molecules

Natali5045456 [20]2 years ago
3 0

Answer:

Explanation:

no. of molecules = mass/ molar mass *6.022*10 ^23

                         =9.00*10^-2/18*6.022*10^23

                        =3.011*10^21

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Explanation:

                    Formula mass of a given molecule is defined as the sum of atomic masses of elements forming the empirical formula of that molecule.

                     In order to calculate the formula mass of propanol, following data is required;

Empirical Formula of Propanol:

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