chemistry

1.85×10−12m

1.85 pm

2.3×10−10L

0.23 nL

The correct result (indicating the proper number of significant figures) of the following problem is ________. (0.002843)(12.80184)0.00032

1.1 × 102

How many nanometers are in one meter?

10^9

15.7×103g

15.7 kg

16.7×106s

16.7 Ms

4.3×10−6 is between which two numbers?

1×10−5 and 1×10−6

How many significant figures are in the measurement 1.0 × 10-4g?

2

What is the temperature of the ocean in kelvins if it is 76°F?

297 K

4.7×10−6g

4.7 μg

What is the symbol for the element silver?

Ag

Black ice is a thin layer of water on a sidewalk or road that has frozen after the temperature has dropped below freezing. It is called black ice because the ice is nearly invisible, especially when driving in a car at night. Which of the following statements is true?

Black ice is an example of a physical change.

You happen to be visiting Northern California and you are driving by Suisun Bay, a notorious graveyard for old ships. You notice that all of these ships appear to be rusting away. Which of the following statements is true?

The rusting of the metal is a chemical change.

The SI base unit of mass is:

kilogram

Which of the following is the best term to describe two or more atoms joined in a specific shape?

molecule

Which state(s) of matter have a definite volume?

solids and liquids

1.34×10−3m

1.34 mm

1.84×102cm

1.84 m

The quantity ________ m is the same as 4 km.

4000

Which of the following are equal to 5×1010?

50×109 500×108 0.5×1011

Carry out the calculation: (1.43) + (3.11) × (1.5) What is the answer rounded to the correct number of significant figures?

6.1

During a physical change:

A substance changes only its physical state.