Chem final exam review

A combination of sand, salt, and water is an example of a _____

• heterogeneous mixture

• compound

• solid

• homogeneous mixture

• pure substance

which one of the following has the element name and symbol correctly matched?

• Tn, tin

• S, sodium

• Fe, iron

• B, bromine

• N, neon

in the following list, only ____ is not an example of a chemical reaction

• the condensation of water vapor

• a burning candle

• dissolution of a penny in the nitric acid

• the formation of polyethylene from ethylene

• the rusting of iron

which one of the following is an intensive property?

• amount

• volume

• temperature

• mass

• heat content

there should be _____ significant figures in the answer to the following computation

• 1

• 2

• 3

• 4

• 5

which one of the following is the highest temperature

• 302 K

• 38 ⁰C

• 96 ⁰F

• none of the above

• the freezing point of water

the density of a gold nugget is 19.3 g/cm³. If the volume of the gold nugget is 0.00369 L, the mass of the nugget is ____g.

• 5.23

• 19.3

• 71.2

• 0.191

• none of the above

an atom of the most common isotope of gold, ¹⁹⁷ Au, has _____ protons,______ neutrons, and _______ electrons

• 197, 79, 118

• 79,118,118

• 79,197,197

• 79,118,79

• 118,79,39

which pair of atoms constitutes a pair of isotopes of the same element?

• 
• 
• 
• 
• 

there are _____protons, _____neutrons, and _____ electrons in ²³⁸U⁺⁵

• 92,146,92

• 146,92,146

• 92,146,87

• 92,92,87

• 146,92,92