Chemistry Answers

If 0.425 mol H₂O are produced, how

many moles of CO3 were reacted?

A. 0.425 mol CO3

B. 0.850 mol CO3

C. 0.213 mol CO3

D. 0.626 mol CO3

25.0 g H₂ are reacted, how much Fe is

produced?

Molar masses: 2.02 g/mol H2, 55.9 g/mol Fe

A. 0.903 g Fe

B. 1,112 g Fe

C. 692 g Fe

D. 346 g Fe

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?