How many liters of oxygen gas, at standard temperature and pressure, will react with 35.4 grams of calcium metal? show all of the work used to solve this problem. 2ca + o2 yields 2cao

19.8 l

Explanation:

1) Chemical equation:

2Ca + O₂ → 2CaO

2) Mole ratios: 2 mol Ca : 1 mol O₂ : 2 mol CaO

3) Convert 35.4 g of Ca to moles:

n = mass in grams / molar mass = 35.4 g / 40.1 g/mol = 0.883 mol

4) Volume proportion: 1 mol of gas at STP = 22.4 l

1 mol at STP              0.883 mol at STP

=

22.4 l                                      x

⇒ x = 0.883 mol × 22.4 l / 1 mol = 19.8 l ← answer

The answer to this problem is. 67

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?