Gas test 1 Flashcards
What is a correct definition of Matter?
Anything that has mass and occupies space.
What is a correct definition of Element?
A substance that cannot be chemically reduced any further.
What is the difference between an Element and a Compound?
A compound is a chemical union of different molecules while an element contains only molecules of that element.
What is the difference between a compound and a mixture?
A compound is a chemical union of different molecules while a mixture contains different molecules of different elements but not chemically united.
What is the category of a substance that has indefinite shape, indefinite volume and definite mass?
Gas.
Which of the following would be an example of a physical change?
Lead melting.
Which of the following is an example of a chemical change?
Separation of water into hydrogen and oxygen.
Liquid dishwashing detergent could be classified as?
Adhesive.
Mercury in a glass tube could be classified as?
Cohesive.
Which of the following is a correct definition of surface tension?
The molecular attraction of the molecules to each other at the surface of the liquid.
The flow of solder into joint is a result of:
Adhesion and capillary attraction.
The two factors that affect the state in which matter exists are:
Pressure and temperature.
How does a pressure cooker reduce cooking times?
Increased pressure and increased temperature.
What is a correct definition of density?
The mass per unite of volume.
Which of the following is densest?
Mercury.
Which of the following are the correct densities of water?
1000 kg/m3 or 62.4 lb/ft3
If cast iron is less dense than copper, why is cast iron pipe heavier than copper tube?
The pipe wall of cast iron is thicker.
Calculate the density of a metal block if 3 cubic feet weigh 2001 lb.
667lb/ft3
Calculate the mass of 3.2m3 of water.
3200 kg.
Calculate the mass of 250 litres of propane liquid.
125 kg.
Calculate the mass of 11000ft3 of air.
836 lb.
Calculate the mass of 30m3 of propane gas.
58.05 kg.
What is the mass of water contained in a cylindrical tank that has a volume of 11.25ft3?
702 lb.
What is the mass of methane gas contained in a spherical tank with a volume of 180m3?
139.32 kg.
Which of the following is a correct definition of relative density for liquids and solids?
The mass of a substance compared to the mass of an equal volume of water.
What is the relative density of mercury?
13.6.
What is the relative density of propane gas?
1.5.
What is the relative density of water and air?
Water 1, air 1.
What is the relative density of propane gas and natural gas?
Propane 1.5, natural gas 0.6.
What would be the mass of 3000L of a liquid with a relative density of 0.89?
2670 kg.
What would be the mass of 10 gallons (US) of a liquid with a relative density of 1.85?
154.105 lb.
What would be the mass of 300ft3 of a gas with a relative density of 1.289?
29.389 lb.
An object has a mass of 1875 kg and a relative density of 1.5. Calculate the volume of the object.
1.25m3
What is the buoyant force available on a 5ft3 object if it is immersed in water?
312 lb
What is the volume of a object that weighs 925kg when weighed in air, but only 570kg when weighted in water?
0.355 m3
What will an object with a volume of 0.658ft3 and a weight of 40 lb do when placed in water?
Barely float, with most of the object submerged.
How much extra weight would be required to sink a sealed drum with a volume of 2.725m3 and a mass of 22.7kg? (Add 1kg extra to cause the drum to sink)
2703.3 kg.
