Magnesium (Mg) reacts with oxygen gas (O2) to produce magnesium oxide (MgO). 2Mg + O2 → 2MgO...

Question

Question

Magnesium (Mg) reacts with oxygen gas (O₂) to produce magnesium oxide (MgO).

2Mg + O₂ → 2MgO

How many grams of MgO are produced when 40.0 grams of O₂ react completely with Mg? [Note Mg = 24.31 g/mol, O₂ = 32.00 g/mol, MgO = 40.31 g/mol]

30.4 g

50.4 g

60.8 g

101 g

201 g

What is the molarity of a solution containing 41.7 g of NaOH in 325 mL of NaOH solution? [Note: 1 mole NaOH = 40.00 g]

3.21 M

0.128 M

7.79 M

2.95 M

2.95 x 10^-3 M

Answer 1

Answer #1

Given equation: 2Mg + O2 + 2MgO Mass of the O2 =40.0 g Number of moles of O, = 40.0 gx= 32.000 =1.25 mole 2mole MgO Number of

Answer 2

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