General Chemistry Answers

How much Sodium Phosphate do we need to add to the water over 1 day in grams, to remove the dissolved iron.

The recomended concentration of sodium phosphate is 7.0mg/L

The amount of iron dissolved in the water is 13.84mg/L

4 300 000L of water go through the city each day.

96.0 g. of a gas occupies 48.0 L at 700.0 mm Hg and 20.0°C. What is its molar mass?

For the following reaction:

A_(aq) + 2 B_(aq) ⇌ 2 C_(aq) + 2 D_(aq)

Calculate the magnitude of K_c (don't report the units) assuming the following composition at equilibrium:

[A] = 0.876 mol L^-1

[B] = 0.708 mol L^-1

[C] = 0.929 mol L^-1

[D] = 0.328 mol L^-1

A nurse practitioner Orders Medrol to be given 2.0 mg per kilogram of body weight if a child weigh 69.4 pounds in the available stock of Medrol is 20 mg/mL how many milliliters does the nurse administer to the child

I have 130 liters of gas in a piston at a temperature of 250 o C. If

I cool the gas until the volume decreases to 85 liters, what will

temperature of the gas be?

If 15.0 liters of oxygen at STP are heated to 500 o C, what will be

the new volume of gas if the pressure is also increased to 1620

mmHg?

A bag of potato chips is packaged in a factory at 101.3 kPa

and has a volume of 350 mL. If this bag of chips is transported

to a city with a at a higher altitude (0.889 atm), what will the

new volume of the bag be?

5.00 L of a gas is collected at 200 K and then allowed to

expand to 20.0 L. What must the new temperature be in order

to maintain the same pressure?

A child has a toy balloon with a volume of 2.80 liters. The

temperature of the balloon when it was filled was 25° C and the

pressure was 2.00 atm. If the child were to let go of the balloon

and it rose 3 kilometers into the sky where the pressure is

0.578 atm and the temperature is -9° C, what would the new

volume of the balloon be?

Atmospheric pressure on the peak of the highest mountain can

be as low as 150 Torr, which is why climbers need to bring

oxygen tanks for the last part of the climb. If the climbers carry

8.0 liter tanks with an internal gas pressure of 3040 Torr, what

will be the volume of the gas when it is released from the

tanks?