Question

Q.1 Given a reaction where 1 mole of starting compound reacts to give one mole of product, what is the theoretical yield in grams if you start with 0.1517 grams of the starting material? Starting Compound Molecular Weight: 75.8 g/mol Product Molecular Weight: 127.3 g/mol Round your number to 4 significant digits. The unit is not required.

Q.2 If one mole of starting compounds reacts to give one mole of product, what is the percent yield of the product if 1.19 mL of starting compound is used to get 0.8429 g of product? Starting Compound Density: 0.9 g/mL Starting Compound Molecular Weight: 145.3 g/mol Product Molecular Weight: 159.8 g/mol Round your answer to 3 significant digits

Answer #1

If a reaction has 1 mole of a starting compound with 0.4969
grams of starting material, and reacts to give 1 mole of product,
what is the theoretical yield in grams? The starting compound
molecular weight is 147.4 g/mol, and the product molecular weight
is 121.4 g/mol.

1. How many moles are in 9.6 mL of acetic anhydride, density of
1.082? Give two significant figures. Given molecular weight: 102
g
2. As a "rule of thumb" there are 20 drops of a liquid in a mL.
Using this estimate and a density of 1.685, how many moles are in 9
drops of 85 % by weight phosphoric acid? Give two significant
digits. Given molecular weight: 98 g
3. Starting with 9.6 g of salicylic acid, how many...

1. Starting with 4.2 mL of acetic anhydride with a density of
1.082, how many grams of acetylsalicylic acid (theoretical yield)
can be made? Assume acetic anhydride is the limiting reagent and a
one to one stoichiometry. Use the molecular weights that you have
already calculated. Give two significant digits.
2. Given that you have calculated the theoretical yield possible
from two or more starting reagents, which compound is the limiting
reagent?
Select one:
a. the reagent that gives the...

Assuming a one to one stoichiometry, starting with 8.93 mL of
2-methylpropan-2-ol, how many grams of 2-chloro-2-methylpropane
should be produced? This is called the theoretical yield. Round to
three significant figures. Assuming the molecular weight of
2-chloro-2-methylpropane is 92.5, and the molecular weight of
2-methylpropan-2-ol is 74.

Data:
8.0 grams of CuSO4 • 5H2O in a 125 mL
Erlenmeyer flask: 8.130 grams
1) Calculate the theoretical yield of
Cu(NH3)4SO4 x H2O
(Molecular Weight= 245.7 g/mol) from the mass of the starting
material, CuSO4 x 5H2O (Molecular Weight=
249.7 g/mol)
2) Calculate the percent yield of the product.
( experimental yield/theoretical yield ) x 100
3) Calculate the theoretical percents of copper, ammonia,
sulfate and water from the formula,
Cu(NH3)4SO4 x H2O

Element Q reacts with oxygen to give a compound with the formula
Q4O10 as the sole product. If 0.186 g of Q reacts completely with
0.240 g of oxygen: Is element Q more likely a metal, a non-metal,
neither of these, or cannot be determined? Justify your choice.
What is the chemical identity of Q?

A.) When 1 mole of CO(g)
reacts with Cl2(g) to form
COCl2(g) according to the following
equation, 108 kJ of energy are
evolved.
CO(g) +
Cl2(g)---->COCl2(g)
Is this reaction endothermic or exothermic? _________
What is the value of q?__________ kJ
B.) When 1 mole of CO(g)
reacts with H2O(l) to form
CO2(g) and
H2(g) according to the following
equation, 2.80 kJ of energy are
absorbed.
CO(g) +
H2O(l)---->CO2(g)
+ H2(g)
Is this reaction endothermic or exothermic? ______________
What is the...

1. Given the following reaction
2C2H6(l)
+ 7 O2(g)
®
4CO2(g)
+
6H2O(l)
How many moles of water are produced when 4.5 moles of oxygen
react? (Hint: Use slides
5-8)
2. Given:
I2 + 3
F2
® 2 IF3
How many moles of I2 are needed to form 3 moles of
IF3?
How many moles of F2 are needed to form 10 moles of
IF3?
How many moles of I2 are needed to react with 3.5
moles of
F2? ...

Part A) What is the molecular formula (hillmethod) of
2-chloro-2-methylpropane? Use proper capitalization of atomic
symbols
Part B) given the following atom weighs, what is the molecular
weight of 2-chloro-2-methylpropane? Give only one decimal and no
extraneous marks. C=12, H=1, N=14, O=16, Cl=35.5
Part C) using information from previous questions and assuming
a one to one stoichiometry, starting with 2.81 mL of
2-methylpropan-2-ol, how many grams of
2-chloro-2-methylpropane should be produced ? This is called
the theoretical yield. Round to...

1.Write the molecular equation and the net ionic equation for
the reaction of H2SO4 with NaOH.
2. Exactly 25.00 mL of 0.1522 M
H2SO4 were needed to titrate 45.25 mL of NaOH according to the
balanced equation in the problem above. Calculate the moles of NaOH
needed for the reaction. Calculate the molarity of the NaOH
solution.
3. One group of students made an
error by using HCl instead of H2SO4 to titrate an unknown solution
of NaOH. Would this...

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