General Chemistry Answers

10.3 moles of H₂O are produced. How

many moles of Fe are also produced?

A. 15.5 mol Fe

B. 6.87 mol

C. 5.2 mol Fe

D. 20.6 mol Fe

If 17.3 g SO₂ are reacted, how much O₂

is consumed?

Molar masses: 32.0 g/mol O₂, 64.0 g/mol SO2

A. 17.3 g O2

C. 0.270 g O2

B. 0.135 g O2

D. 4.33 g O2

using a table, differentiate between the percentage composition by volume of atmospheric air and dissolved air

Under constant pressure condition, a sample of hydrogen initially at 75 degree celcius and 6.2 L is cooled until its final volume is 5.4 L. What is it final temperature?

A sample of gas has a volume of 85.8 mL at 35 degrees. what volume will the sample occupy at 0 degrees when the pressure is held constant?

calculate the vapour pressure of solution at 25°C containing 26.9g of urea CO(NH2)2 in 712g H2O.( Vapour pressure of water at 25°C is 23.8mmHg)

When 0.600 liters Ar at 1.20 atm and 227°c is mixed with 0.200 liters of oxygen, at 591 torr and 127°c in a 400ml flask at 27°c, what is the pressure in the flask?

What is the percent by volume of ethanol in a solution that contains 45mL of ethanol dissolved in 125mL of water?

2. If a sample of helium gas has a volume of 120 mL and a pressure of 850 mm Hg, what is the new

volume if the pressure is changed to 425 mm Hg ?

How many milliliters of a 6.75 M NaOH solution would be needed to prepare 575 mL of a 3.01 M solution?