Question

Calculate molar mass of:
*Ethyne
*sodium chloride
*Phosphorus molecule

Answer 1

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1.Ethyne=C2H2

2.sodium chloride=NaCl

3.phosphorus=P4.

$\huge\mathfrak\green{Hope \: it \: helps!!}$

Answer 2

Answer

(a) Molar mass of ethyne, C2H2 = 2 × 12 + 2 × 1 = 28g.

the atomic mass of phosphorous is 30.97 amu, we can say the mass is

m

=

4

×

30.97

=

123.88

g

mol

This means that 1 mol of

P

4

weighs 123.88 grams.

Sodium chloride / Molar mass

58.44 g/mol

Formula: NaCl

Density: 2.16 g/cm³

thank u