1. Which branch of chemistry is concerned with the detection or identification of substances present in a sample and their amount?
2. Identify the INCORRECT statement below:
3. Which of the following properties of Na metal is a physical property?
4. Which of the following property is NOT an intensive property of a material?
5. Which of the following materials has NOT been properly classified?
6. The correct symbol for the element Tin is:
7. The most abundant element by % mass in the Earth¹s crust, oceans and atmosphere is:
8. Which is an INCORRECT statement regarding the SI system of units?
9. The density of Fe is 7.86 g/mL. Convert this to pounds per cubic foot.
10. This summer I took a 4500 mile vacation in a van which gets 13 miles/gallon of gasoline. If the average price of gasoline on the trip was $1.27 per gallon, how many dollars did I spend on gasoline?
11. A reaction requires 10.0 g ethanol. What volume of ethanol/water mixture which is 60% ethanol by mass would be required? The Specific Gravity of this mixture is 0.8937.
12. Permalloy steel is an alloy which is 21.2% Fe by mass. How many grams of Fe are present in 1.000 kg of steel?
13. Which distance is greater? (Given: 1 Ångstroms = 1 x 10-10 m)
KEY1)a 2)c 3)b 4e 5)d 6)a 7)b 8)a 9)b 10)e 11)d 12)a 13)b
1. Identify the INCORRECT statement below:
2. Which is an INCORRECT statement regarding unit systems?
3. Which element is INCORRECTLY matched with its symbol?
4. Which of the following property is an intensive property of a material?
5. Which of the following properties of water is chemical property?
6. Which element below is NOT among the five most abundant elements by % mass in the Earth's crust, oceans and atmosphere?
7. Denatured alcohol is ethyl alcohol to which various agents have been added to render it unfit for human consumption. A particular formula of denatured alcohol has 91% ethyl alcohol by mass. How many grams of ethyl alcohol are present in 500 g of this denatured alcohol?
8. Which of the following materials has NOT been properly classified?
9. The density of Au is 19.3 g/mL. What would be the value of a 100 cm3 ingot of gold if gold is worth $35 per ounce. (Note: There are 16 ounces in a pound; 1 pound = 0.4536 kg)
10. Which volume is greater? (Given: 1.00 in = 2.54 cm)
11. I want to measure out 50 grams of liquid methanol from a bottle on the shelf. The density of liquid methanol is 0.79 g/mL. How many mL do I need to measure out?
12. Which branch of chemistry is concerned with, among other things, the energy changes associated with chemical reactions?
KEY1)c 2)a 3)e 4)c 5)b 6)d 7)b 8)a 9)c 10)b 11)e 12)d
1. Which state of matter does not completely fill its container and has no definite shape of its own?
2. Which state of matter is most easily compressed?
3. Which of the following substance classifications is NOT CORRECT?
4. A motorcycle engine has a displacement volume of 650 cubic centimeters (650 cm3). What is the volume in cubic inches?
5. An ore is mined in which the cobalt content is 1.2% by mass. How many pounds of ore must be processed to yield 15 pounds of cobalt?
6. An iodine atom has a diameter of 2.66 x 10-10 m. If iodine atoms are lined up so that they are just touching, how many of them would it take to have a line 1.00 feet long?
7. Which of the following is a chemical change involving silver?
8. Below are five properties concerning a sample of elemental gallium. Which of the following answers specifies all the intensive properties?
9. Which of the following is an example of a compound?
10. The element indium has a density of 7.31 g/cm3. What is the mass of a piece of indium whose volume is 0.52 cm3?
11. In order to achieve orbit, a rocket has to reach a speed of 5.0 mile/second. What is this speed in kilometers/hour? (1 mile = 5280 feet, 12 in = 1 foot, 1 meter = 100 centimeters, 1 kilometer = 1000 meters)
12. Which of the following element/symbol combinations is NOT CORRECT?
KEY1)b 2)a 3)a 4)b 5)a 6)c 7)b 8)d 9) b 10)a 11)b 12)d
1. The EPA emission standards limit each automobile exaust to 23.0 g of carbon monoxide (CO) per mile. In an average city there are 82,700 cars, each driven an average 13.5 miles/day. How much CO (in kg) can be legally discharged into the atmosphere each day?
2. Of the following properties of sucrose, which ones are chemical properties?
3. Which branch of chemistry deals with determining the identity and composition of matter?
4. Which of the following processes are exothermic?
5. Which of the following properties would not be useful in charecterizing a substance?
6) Which of the following statements is FALSE?
7. Which of the following materials is NOT a pure substance?
8. In Biblical times, volume was measured by the OMER and weight by the SHEKEL. Given the conversions below, calculate the density of gasoline (0.680 g/mL) in sheckels/omer.
9. Nichrome is an alloy (mixture) commonly used to make heating elements. It is composed of 60% nickel, 24% iron and 16% chronium. If you have 2.15 g of nichrome wire, how much of each element do you have?
10. The same amount of heat is added to a 25 g sample of each of the metals below. If they are all initially at 25oC, which will reach the highest temperature?
11. The density of octane is 0.702 g/mL. What is the volume of 63.0 g of octane?
12. The statement that the total mass does not change in a chemical reaction is the Law of:
13. From the decomposition of an unknown solid, one obtains a gas and a new solid, both of which are pure substances. From just this information it can be said, without a doubt, that:
14. Which of the following properties do liquids and gases have in common?
15. The fact that compound calcium carbonate is made up of 40% calcium, 12% carbon, and 48% oxygen is an illustration of the Law of: