General Chemistry Answers

 In a biochemical assay, a chemist needs to add 2.93 g of glucose to a reaction mixture. Calculate the volume in mL of a 1.35M glucose solution she should use for the addition.

Iron produces from fe2o3 by reaction with carbon. The reaction products are

Fe, FeO and CO. If we mix 100 Kg of Fe2o3 and 24 Kg of C and produced 12 Kg of FeO, determine:

a) Limiting reaction and excess reaction.

b) % Excess reaction.

c) % Conversion of Fe2o3 and C.

d) The degree of completion of reaction.

e) Mass of Fe in Kg.

Fe2o3+ 2C / Fe+FeO+2CO

Mw;

Fe = 56

C=12.

O = 16

3. A 11.896-gram sample of metal shavings was lowered into a graduated cylinder containing 6.40mL of water; the water level rises to 7.53 mL. Calculate the density of the metal pieces.

2. A student experimentally measured the density of gold as 19.74g/cm3. A handbook reports a value of 19.02 g/cm3. Calculate the percent error in the student’s measurement.

1. Which has a greater volume, 10 grams of water or 10 grams of acetone? [density of acetone is 0.79g/mL]

How many liters of a stock solution of 2.50M KNO3 are needed to prepare 10 L of 0.78M KNO3?

Push the plunger of cylinder c in so that it goes in 2cm .make a note of your observation of the distance output in syringe A.

What will happen when 3.00 grams of CCI4 reacts with 3.00 grams of HF.

For the following reaction, 10.6 grams of sulfur are allowed to react with 22.8 grams of carbon monoxide .

sulfur ( s ) + carbon monoxide ( g )  sulfur dioxide ( g ) + carbon ( s )

What is the maximum amount of sulfur dioxide that can be formed?  

What is the FORMULA for the limiting reagent?

What amount of the excess reagent remains after the reaction is complete?

Rhodium has an FCC crystal structure, an atomic radius of 0.1345 nm and atomic weight of 102.9 g/mol. Calculate the density of rhodium.