The mass of a quantity of NiCl2
2 answers:
<u>Answer:</u> The correct answer is Option A.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of nickel chloride = 24.6 g
Molar mass of nickel chloride = 129.6 g/mol
Putting values in above equation, we get:
Formula units is defined as lowest whole number ratio of ions in an ionic compound. It is calculate by multiplying the number of moles by Avogadro's number which is
We are given:
Number of moles of nickel chloride = 0.19 moles
Number of formula units =
Hence, the correct answer is Option A.
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Answer:- atoms.
Solution:- We have been given the grams of carbon tetrachloride and asked to calculate the number of atoms of chlorine. It is a three step conversion problem. In the first we convert the grams of carbon tetrachloride to moles of it. In second step we convert moles of carbon tetrachloride to moles of chlorine and in the third step we convert the moles of chlorine to atoms of chlorine.
For grams to mole conversion we need the molar mass of the compound. Molar mass of carbon tetrachloride is 153.82 grams per mol. If we look at the formula of carbon tetrachloride then four chlorine are present in it. It means 1 mol of carbon tetrachloride has four moles of chlorine. The calculations are as follows:
= atoms
So, there are atoms in 12.2 grams of
.