Unit 1 Quiz
If my mass on earth is 100 kg, what would my mass be on the moon, where gravity is 1.63 m/s/s?
100 kg
When 145 g of chromium reacts with 34 g of oxygen gas to form chromium (II) oxide, no chromium or oxygen is left over. How much chromium (II) oxide is produced?
179 g
If your weight on earth is 107 pounds and the force of gravity on the sun is 27 times the gravity of the earth, what would your weight be on the sun?
2889 pounds
According to the law of conservation of mass, how much KF is consumed in the following reaction? (40 g) + (?) → (80 g) + (20 g) 2Al + 6KF → 2AlF3+ 6K
60 g
In which of the following examples does a chemical change occur?
A leaf changes color in the fall.
What are the reactants in the following equation? 2Ga + 6HI → 2GaI3+ 3H2
Ga and HI
What are the products in the following equation? 2Ga + 6HI → 2GaI3+ 3H2
GaI3 and H2
Stewart is about to jump from the high dive. At point A, he is leaving the board, at point B, he is halfway to the water below, and at point C, he is about to reach the water. What is true of Stewart's potential energy?
It is higher at point B than at point C.
Which of the following is true of the mass of an object?
It is measured on a balance.
Which of the following is true of the mass of an object?
Its mass is measured in kg.
In which of the following examples does a physical change occur?
Water freezes to make ice cubes.
Which of the following has the highest amount of kinetic energy?
a ball traveling at 90 mph
Is a bike rusting a physical or a chemical change?
a chemical change
Is burning paper a physical or a chemical change?
a chemical change
Is peaches rotting a physical or a chemical change?
a chemical change
Is silver tarnishing a physical or a chemical change?
a chemical change
When a student burns a piece of zirconium, they see a bright light and are left with a new powdery substance. What has this student observed?
a chemical change
Is dissolving sugar in water a physical or a chemical change?
a physical change
What is the difference between and a pure substance and a mixture?
a pure substance is an element or compound and a mixture is two or more substances
Which of the following is an example of a homogeneous mixture?
air
A doctor uses this technique to measure the blood alcohol level of a patient because alcohol travels across the filter at a different rate than other bodily fluids. This is an example of what kind of separation technique?
chromatography
Which of the following is not a physical change?
digesting
A student wants to separate a mixture of rocks and water. Which separation technique would he or she use?
filtration
Which of the following is a heterogeneous mixture?
granite
Which of the following is a heterogeneous mixture?
marble
Which of the following is not a chemical change?
melting
Which of the following is an element?
oxygen
Which of the following is a pure substance?
sodium chloride
Which of the following is a compound?
water
Which of the following is a homogeneous mixture?
windex
