Question

of the x atoms in a certain molecule, 44% are carbon. which expression represents the number of carbon atoms in this molecule?
a $\frac{x}{0.44}$
b $0.44x$
c $x - 0.44$
d $x + 0.44$

Explanation:

Step1: Convert percentage to decimal

To find a percentage of a number, we first convert the percentage to a decimal. 44% is equivalent to 0.44 in decimal form.

Step2: Calculate number of carbon atoms

We want to find 44% of $x$ atoms. To find a certain percentage of a quantity, we multiply the decimal - form of the percentage by the quantity. So the number of carbon atoms is $0.44\times x=0.44x$.

Answer:

B. $0.44x$