Formula unit mass for $K_{2} C O_{3}$ is :

140u

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138u

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120u

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125u

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Solution

The correct option is B 138u
Formula unit mass of $K_{2} C O_{3} =$
$2 \times A t o m i c m a s s o f K + 1 \times A t o m i c m a s s o f C + 3 \times A t o m i c m a s s o f O$
= $2 \times 39 u + 1 \times 12 u + 3 \times 16 u$
= 138 u.

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Similar questions

(N H_{4})_{2} S O_{4}

Calculate the formula unit mass of $K_{2} {C O}_{3}$ .

K_{2} C O_{3}

Z n O, N a_{2} O, K_{2} C O_{3}

Z n = 65 u, N a = 23 u, K = 39 u, C = 12 u

O = 16 u

Z n O, N a_{2} O, K_{2} C O_{3}

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