Determine the number of CH2Cl2 molecules in 25.4 g CH2Cl2. Determine the number of molecules in 25.4 ....

Question

Question

Determine the number of CH2Cl2 molecules in 25.4 g CH2Cl2.

Determine the number of molecules in 25.4 .

2.00×10^25 molecules

0.299 molecules

1.80×10^23 molecules

1.62×10^27 molecules

science chemistry

Answer 1

Answer #1

1 mol of any substance contains 6.022*10²³ molecules/atoms. (Avogadro law)

Calculating the moles of given CH2cl2

Number of moles = given weight(g)/molecular weight (gmol^-1)

= 25.4g/85gmol^-1. = 0.2988 mol

So number of molecules in 0.2988 mol

= 0.2988*6.022*10²³ molecules = 1.79*10²³ molecules

~1.80*10²³ molecules

Answer 2

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