How many phosphorous atoms are found in three molecules of magnesium phosphate, 3mg3(po4)2?
1
2
3
6

Option (d) is the correct answer.

Explanation:

Since the given formula is . According to cross method formula, magnesium has +2 charge so, is multiplied by 2.

Thus, 1 molecule of magnesium phosphate will contain 2 atoms of phosphorus.

Therefore, three molecules of magnesium phosphate contains following number of atoms.

Hence, we can conclude that there are 6 atoms of phosphorus in three molecules of magnesium phosphate, .