Chem Final

A sample of gold has a mass of 96.5 g and a volume of 5.00 cm3. The density of gold is

19.3 g/cm3

An analytical balance can measure mass to the nearest 0.0001 g. In scientific notation, the accuracy of the balance would be expressed as

1x10^-4g

The measurement 0.020 L is the same as

2.0x10^-2 L

The number of significant figures in the measurement 2010 cm is

3

When 11.4 is divided by 3.2 the correct answer is ___________.

3.6

The product of 13 cm and 5.7 cm is correctly reported as

4 cm2

Three samples of 1.12 g, 1.8 g, and 1.562 g are mixed together. The combined mass of the three samples, expressed to the correct number of significant figures, would be recorded as

4.5 g

When 1.92 x 10-3 mL is subtracted from 6.8 x 10-1 mL, the correct answer rounded for significant figures equals

6.8x10^-1mL

If 1 inch equals 2.54 cm, how many centimeters equal 1 yard?

91.4 cm

What is the name for the element whose symbol is Bi?

bismuth

Organic chemistry is the study of

carbon containing compounds

_________ is an example of a chemical change.

changing color

A solid substance is

always the shape regardless of its container.

A team of scientists is working to discover how an enzyme affects blood cells in sheep. They are working in the field of _____________.

analytical chemistry

A chemical can be defined as

any substance that has a definite composition

Standards of measurement are chosen because they

are reproducible in another laboratory.

Matter includes all of the following except

light

Which of these measurements has only nonsignificant zeros?

0.0037 ml

The measurement 0.035550 g rounded off to two significant figures would be

0.036 g

A volume of 1 milliliter is equivalent to

1 cubic centimeter

The scientific method always begins with _______________.

observing

Which of the following is an example of a homogeneous mixture?

orange juice

The horizontal rows on the periodic table are called

periods

A chemist obtained the values 5.2246 g, 5.2353 g, and 5.2501 g for the mass of a sample. Without knowing the true mass of the sample, it can be said that these values have

poor precision

If repeated measurements agree closely but differ widely from the accepted value, these measurements are

precise, but not accurate

Find the symbol for the element Argon.

Ar

Find the symbol for the element Europium

Eu

What is the symbol for the element Neon?

Ne

Iron and sulfur, when heated, form an iron sulfide that has different properties from either iron or sulfur. The formation of iron sulfide is an example of a ____________ change.

chemical

Which of the following is an example of an intensive property?

density

The density of an object is calculated by

dividing its mass by its volume

____________ is a pure substance that cannot be broken down and made of only one type of atom.

element

Gravel is an example of a(n) _____________ mixture.

heterogenous

What is the name for the element whose symbol is H?

hydrogen

Applied research is carried out

in order to solve a particular problem

What happens to the energy in a substance when it changes state?

it changes form, but is neither destroyed nor increased.

All of the following are examples of units except

mass

Which of these is a measure of the amount of material that is not effected by gravity?

mass

Which of the following is not a chemical change?

melting

The SI base unit for length is the

meter

The symbol mm represents

millimeter

Iron and sulfur, when heated, form an iron sulfide that has different properties from either iron or sulfur. The formation of iron sulfide is an example of the ____________ in this reaction.

products

Palo Verde's school colors are Black, Green and Silver. This is an example of ______________ data.

qualititative

The oxygen in the air causes iron to rust. Iron and oxygen are ______________ in the process and rust is the product.

reactants

A theory is accepted as the explanation of an observed phenomenon until

repeated observations conflict with the theory.

Metalloids are often

semiconductors

A homogeneous mixture is also called

solution

The graphs for direct and inverse proportions are ___________ and ____________.

straight, curved

_______________ is performed to better our quality of life.

technological development

If values for x and y vary as an inverse proportion,

their product is a constant