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1- What is the molar mass of the following compounds?
a. Ca(OH) 2 _______________________________=
b. H 2 O 2 _______________________________=
c. KCl _______________________________=
d. NaH 2 PO_______________________________=

Sagot :

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Answer:

a. Ca(OH)₂ = 74.08 g/mol

b. H₂O₂ = 34 g/mol

c. KCl = 74.55 g/mol

d. NaH₂PO₄  = 119.97 g/mol

Explanation:

In order to determine the molar mass of each compound we need to sum, the molar mass of each element.

a. Ca(OH)₂

40.08 g/mol (Ca) + 2 . 16 g/mol (O) + 2 . 1 g/mol (H) = 74.08 g/mol

b. H₂O₂ → 2 . 1 g/mol (H) + 2 . 16 g/mol (O) = 34 g/mol

c. KCl → 39.1 g/mol (K) + 35.45 g/mol (Cl) = 74.55 g/mol

d. NaH₂PO₄

23 g/mol (Na) + 2 . 1 g/mol (H) + 30.97 g/mol (P) + 4 . 16 g/mol (O) = 119.97 g/mol

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