Multiple Choice
When magnesium is heated in air, it reacts with oxygen to form magnesium oxide: 2Mg(s) + O2(g) → 2MgO(s) If the mass of the magnesium solid increases by 0.335 g, what mass of magnesium metal should have reacted?
A) 0.882 g
B) 0.441 g
C) 0.509 g
D) 1.02 g
E) not enough information
Correct Answer:

Verified
Correct Answer:
Verified
Q123: An aqueous solution containing 15.0 g of
Q124: Which of the following processes is exothermic?<br>A)boiling
Q125: Nitrogen monoxide reacts with oxygen according to
Q126: How much heat must be added to
Q127: Consider the reaction between sodium metal and
Q128: Equal masses of ice at 0°C and
Q129: Small amounts of oxygen gas can be
Q130: A 43 g serving of a chocolate
Q131: Phosphine, PH<sub>3</sub>, a reactive and poisonous compound,
Q133: Given the balanced equation 4NH<sub>3</sub>(g)+ 5O<sub>2</sub>(g)→ 4NO(g)+