Question

mylanta a common antacid contains magnesium hydroxide Mg (OH)2.How many miles of magnesium hydroxide are in 75.0g of magnesium hydroxide?
i)0.551 moles
ii)0.778 moles
iii) 1.29moles
iv)1.82 moles​

Answer 1

Answer:

One mole of magnesium hydroxide contain 58 grams.

Therefore, 1 gram of magnesium hydroxide contain 1/58 moles.

75g contain 75×1/58 moles=1.2931 moles.

Therefore, option C is correct.