General Chemistry Answers

You have a 100.0 mL graduated cylinder containing 50.0 mL of water. You carefully place 123 g piece of brass (density= 8.56 g/mL) into the water. What is the final volume reading in the graduated cylinder?

mix 6.80 mL of CHCl3 (d=1.492 g/mL) and 6.90 mL of CHBr3 (d= 2.890 g/mL) giving 13.7 mL

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 9.71 g of hydrobromic acid is mixed with 6.5 g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the chemical reaction. Round your answer to 3

 significant digits.

A particular medication dosage is 45.0 mg/kg of body weight. What is the mass in mg of the medication a child weighing 33.9 lb. should receive?

How to assign "r and s" configuration to pseudo asymmetric centers in cis 1,3-dimethylcyclobutane ?

The half-life for the first-order decomposition of N2O5 is 2.05 x 104 s. How long will it take for a sample of this compound to decay to 80% of its initial value?

a. 8.97 x 107 s b. 1.51 x 106 s c. 6.60 x 107 s d. 1.48 x 107 s

It is desired to nake 1.00 Liter of 6.00 M nitric acud from concentrated 16.00 M HNO3.

a. How many moles of nitric acid are in 1.00 L of 6.00 M nitric acid?

 A pyramid has a height of 500 ft, and its base covers an area of 15.0 acres (referring to the right figure). The volume of a pyramid is given by the expression 𝑉 = 1/3 𝐵ℎ, where B is the area of the base and h is the height.

(a) Find the volume of this pyramid in cubic meters. (1 acre = 43,560 ft² also use 1 ft = 3.33 m).

(b) Find the volume of the pyramid in terms of cubic centimeter (use 100 cm = 1 m, express in scientific notation and Greek prefix if necessary).

(c) Express the volume in terms of liters L. (Use 1 L = 0.001 m³). 

Calculate the cell potential for the following reactions and predict whether the reaction

will take place. If it will take place, write the cell notation.

1. Zn (s) + 2 Ag+

(aq) → Zn+2 (aq) + 2 Ag (s)

2. Cu (s) + Ni+2 (aq) → Cu+2 (aq) + Ni (s)