chemistry
1.84×102cm
1.84 m
1.85×10−12m
1.85 pm
1.34×10−3m
1.34 mm
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
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.
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