How many moles of O is present in 34 grams of Mg(NO_(2))_(2) a. 1.17 b. 1.61 c. 4.00 d. 0.29 e. 0.58

To find the number of moles of oxygen (O) in 34 grams of , we need to first determine the molar mass of and then calculate the moles of oxygen based on the given mass.The molar mass of is calculated as follows:- Magnesium (Mg) has a molar mass of approximately 24.31 g/mol.- Nitrogen (N) has a molar mass of approximately 14.01 g/mol.- Oxygen (O) has a molar mass of approximately 16.00 g/mol.The formula indicates that there is one magnesium atom, two nitrogen atoms, and four oxygen atoms in each molecule. Therefore, the molar mass of is: Now, we can calculate the moles of in 34 grams: Since there are four oxygen atoms in each molecule of , the moles of oxygen in 34 grams of is: Therefore, the correct answer is:a. 1.17