Question

how many hydrogen (h) atoms are in 4nh₃? 1 4 3 12

Explanation:

Step1: Analyze ammonia formula

In one $NH_3$ molecule, there are 3 hydrogen atoms as indicated by the sub - script 3 next to H in $NH_3$.

Step2: Consider the coefficient

We have 4 molecules of $NH_3$ (the coefficient 4 in front of $NH_3$). To find the total number of hydrogen atoms, we multiply the number of hydrogen atoms in one $NH_3$ molecule by the number of $NH_3$ molecules. So the total number of hydrogen atoms is $4\times3$.

Step3: Calculate the result

$4\times3 = 12$.

Answer:

D. 12