What is the approximate mass of $C a (N O_{3})_{2}$ ?
(Given- Atomic mass of $C a = 40, N = 14, O = 16$ )

70

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82

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102

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150

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164

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Solution

The correct option is E $164$
The approximate mass of $C a (N O_{3})_{2}$ $= 40 + 2 \times [14 + (3 \times 16)] = 40 + 2 \times (14 + 48) = 40 + 2 \times 62 = 40 + 124 = 164$ .

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What is the approximate mass of Ca(NO3)2?(Given- Atomic mass of Ca=40,N=14,O=16)

The correct option is E 164The approximate mass of Ca(NO3)2 =40+2×[14+(3×16)]=40+2×(14+48)=40+2×62=40+124=164.

What is the approximate mass of $C a (N O_{3})_{2}$ ?
(Given- Atomic mass of $C a = 40, N = 14, O = 16$ )

The correct option is E $164$
The approximate mass of $C a (N O_{3})_{2}$ $= 40 + 2 \times [14 + (3 \times 16)] = 40 + 2 \times (14 + 48) = 40 + 2 \times 62 = 40 + 124 = 164$ .