Answer: pretty sure its 0.214 moles * 40.3g/mole = 8.6g (2 sig figs) of MgO, and
0.035 moles * 40.3g/mole = 1.4g of MgO
Explanation:
Based on the compounds given, I can say that the substance that is considered essential in the plastic making is NITRIC ACID. This substance is also known as aqua fortis and spirit of niter wherein this decomposes into oxides of nitrogen and water. The answer would be the last option. Hope this helps.
Q. No. 1:
a) Endothermic
b) Exothermic
c) Endothermic
d) Exothermic
Q. No. 2:
a) Exothermic
b) Because heat is on product side (evolved to surrounding).
c)
1400 Kj = was produced by 1 mole of C₂H₄
Then,
2100 Kj = will be produced by X moles of C₂H₄
Solving for X,
X = (2100 Kj × 1 mol) ÷ 1400 Kj
X = 1.5 moles of C₂H₄
d)
3 moles of O₂ produced = 1400 Kj of Heat
Then,
1.5 moles of O₂ will produce = X Kj of Heat
Solving for X,
X = (1.5 mol × 1400 Kj) ÷3 mol
X = 700 Kj of Heat
Answer:
69%
Explanation:
Percent yield = ?
Theoretical yield = 985 grams
Experimental Yield = 680 grams
Percent Yield = Experimental Yield / Theoretical Yield * 100
Percent Yield = 680 / 985 * 1 00
Percent Yield = 0.690 * 100 = 69%