Exam 1- Chemistry 1341

The correct answer (reported to the proper number of significant figures) to the following is... (12.67+ 19.2)(3.99) / (1.36+11.366)=

1.00 x 10^1

1.55kg/m3 is equivalent to ________g/L.

1.55

Express the temperature, 275.18 K, in degrees Celsius.

2.03 C

Which of the following has the same number of significant figures as the number 0.0050?

4.0

Which of the following are chemical processes? 1. Rusting of a nail 2. Freezing of water 3. Decomposition of water into hydrogen and oxygen gases 4. Compression of oxygen gas A.) 1,3 B.) 2,3,4 C.) 1,3,4 D.) 1,4 E.) 1,2

A.) 1 & 3

An element cannot _____.

Be separated into other substances by chemical means

Which of the following is NOT an intensive property? A. Density B. Temperature C. Mass D. Melting point E. Boiling Point

C. Mass

A separation process that depends on differing abilities of substances to form gases is called ________.

Distillation

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

Heterogenous mixture

Which of the following is an illustration of the law of constant composition?

Water is 11% hydrogen and 89% oxygen by mass

The element calcium is in a group known as the ________.

alkaline earth metals

_____ is the abbreviation for the prefix milli-

m

Of the three types of radioactivity characterized by Rutherford, which type does not become deflected by a electric field?

y- rays (gamma rays)

The charge on the silver ion in the salt AgCl is ________.

+1

An object measuring 77 milliliters will have a volume of ________ liters.

0.077