Other Chemistry Answers

1, A cylinder with a movable piston contains 255 cm³ air at 10⁰C. At what temperature would you expect the volume to be 155 cm³ if the pressure is kept constant?

5.A car with an internal volume of 10,500 litres, drove into the river and imploded. What is the volume of the gas when 1.0 atmospheric pressure increased to 1.2 atm.?

4.You have added 10 litres of air to a balloon at 1.0 atm. What is the new volume of the balloon if you take it to a 0.90 atmospheric pressure ?

3. Robert has a 4.5 litres of gas in a piston at a pressure of 1.45 atm. What will be the new pressure inside the piston to reduce the volume of the gas to 3.60 litres?

2.  A scuba diver needs a diving tank in order to provide breathing gas while he is under water. Calculate the pressure needed for 6.50 litres of gas at 1.02 atmospheric pressure to be reduced in a 3.25 litres cylinder.

1. Oxygen gas inside a 1200 litres gas tank has a pressure of 1.0 atm. If the temperature remains constant , how much pressure is needed to reduce its volume by one- half (1/2) ?

A 0.784-g sample of an alloy containing Al and Mg is dissolved and treated to prevent interferences by the alloy’s other constituents. Aluminum and magnesium are precipitated, providing a mixed precipitate of Al(C9H6NO)3 and Mg(C9H6NO)2 that weighs 8.215 g. Igniting the precipitate converts it to a mixture of Al2O3 and MgO that weighs 0.932 g. Calculate the %w/w Al and %w/w Mg in the alloy.

Aqueous iron (III) chloride and sodium carbonate solution yields aqueous sodium chloride and a precipitate of iron (III) carbonate.​