Chem Test 1

Which of the following statements about determining the number of significant figures in a measurement are correct?

• All nonzero digit are always significant

• A zero counts as significant when it occurs at the beginning of a number

• A zero does not count as significant when it occurs between two nonzero digits

• A zero counts as significant when it occurs at the end of a number w/ a decimal point

Matter is anything that has ____.

• Volume

• Mass

• None

• Volume and Mass

Which statement applies to all chemical changes

• Every chemical change will emit light

• At the end of all chemical changes, a new substance is produced

• All chemical changes have a change in the state of matter

• Chemical changes always produce heat

Which of the following are correct unit conversion factors involving the gram?

• 1g/10^3 mg

• 1lb/454g

• 10^6ug/1g

• 1mg/10^3g

• 1g/10^3kg

Metric basic unit of length.

(a)  

Metric basic unit of mass.

(a)  

Metric basic unit of volume.

(a)  

Which of the following units are possible units for density?

• mg/dL

• g/cc

• kg/L

• mL/g

• cc/g

What statements correctly describes compounds?

• Compound are formed by chemically combining two or more elements

• All known compounds are listed on the periodic table

• Compounds can be separated into elements by physical processes

• Compounds are pure substances

Chemistry is the study of _____- it's composition, _____, and transformation.

(a)