Question

(i) The number of molecules in 32 g of methane is:

(a) 3.0x1023 (b) 12.04x1023 (c) 6.02x1023 (d) 2.4x1023​

Answer 1

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No.of moles in 32 g of methane = 2

No. of C and H = 10

No. of molecules= 2×6.02×10²³

= 1.204×10²⁴

The number of molecules in 32 g of methane is: = 1.204×10²⁴

Answer 2

Answer:

option b)

Explanation:

first we need to find the number of moles

moles =given weight by gram molecular weight

the gram molecular weight of methane is 16 so 32 divided by 16 which is equal to 2 moles

number of particles is equal to number of moles*avogadros number

=2*6.022*10 to the power 23

=12.04*10 to the power 23