Answer:
Zr
Explanation:
The balance equation of the reaction is:
Zr + 2 H₂O ⇒ ZrO₂ + 2 H₂
Being:
- Zr: 91 g/mole
- H: 1 g/mole
- O: 16 g/mole
the molar mass of the reactants participating in the reaction are:
- Zr: 91 g/mole
- H₂O: 2*1 g/mole + 16 g/mole= 18 g/mole
If by stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction) they react in moles:
then by stoichiometry the following quantity of mass react:
- Zr: 1 mole*91 g/mole= 91 g
- H₂O: 2 moles*18 g/mole= 36 g
Now the following rule of three applies: if 91 g of Zr react with 36 g of H₂O, 4500 g of Zr with how much mass of H₂O would it react?
mass of H₂O= 1,780 grams
But 1780 grams of H₂0 are not available, 1.5 * 10⁴(15,000) grams are available. Since it has more mass than it needs to react with 4500 grams of Zr, Zr zirconia will be the limiting reagent.
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Answer:
The percent yield is 77.18%.
Explanation:
1st) According to the balanced reaction, 1 mole of Pb(NO3)2 reacts with 2 moles of KI to produce 2 moles of KNO3 and 1 mole of PbI2.
We can convert the moles to grams using the molar mass of Pb(NO3)2 (331.2g/mol), KI (166g/mol) and KNO3 (101g/mol):
- Pb(NO3)2 conversion: 331.2g
- KI conversion: 332g
- KNO3 conversion: 202g
2nd) Now, with the stoichiometry of the reaction in grams we can calculate the grams of KNO3 that must be produced (this is the Theoretical yield):
So, this is the theoretical amount of KNO3.
3rd) With the theoretical yield (20.03g) and the Actual yield (15.46g) we can calculate the percent tield:
So, the percent yield is 77.18%.
At 45.35 c cause of how you multiply the division
Answer:
Explanation:
14:
a) Shared pairs = 6
per shared pair between each C-H bond.
and two shared pair between C=C thus total shared pairs are 6
a) Lone pairs = 0
b) Single bonds = 4
Double bonds = 1
Triple bonds = 0
c) Formula = C₂H₄
Name = Ethene
d) Lewis structure = given structure is also Lewis structure.
13:
a) Shared pairs = 3
a) Lone pairs = 2
b) Single bonds = 0
Double bonds = 0
Triple bonds = 1
c) Formula = N₂
Name = Dinitrogen
d) Lewis structure = given structure is also Lewis structure.
