ACTUAL UNIT 2 EXAM

a 25 g sample of a piece of metal with a density of 8.92 g/mL is placed into a graduated cylinder containing 10 mL of water. What will the final volume of the water in the cylinder be after the metal sample is inserted

12.8 mL

The density of ethyl alcohol is .789 g/mL. What is the mass every 25.0 cm³ of the substance

19.7g

which data set has the greatest Percision

2.01 g, 2.02 g, 2.03 g

which of the following measurements is the least certain or has the greatest uncertainty

200. g

calculate the volume of a ball that has a diameter of 7.35 cm. The following formula for a sphere is: V= 4/3 pi (d/2)^3

208 cm^3

which of the following is a derived unit

density

arrange the following prefixes in order from largest to smallest: centi, giga, kilo, mega, nano, milli, micro

giga, mega, kilo, centi, milli, micro, nano

how many significant digits are there in 6480 marbles

infinite

which of the following is the SI base unit for mass

kilogram

A measurement of 25.2400 g is obtained from a digital analytical balance. What place value represents the smallest increment on the instrument

thousanths

keeping in mind the rules of significant digits, find (3.87 x 10^-1) - (4.670 x 10^2)

-4.666 x 10^2

convert 58.85 nm into meters

.00000005885 m

put the following measurement into longform (non-scientific notation) 5.12 x10^ -5

.0000512 g

what set of calculations based on dimensional analysis provides the correct answer for the following conversion: .140 L = ______ fluid ounces

.140 x 128/3.78

what is the density of a foam block that has a mass of 49,965 mg and measures 12.19 cm x 4.01 cm x 7. 20 cm. You significant digits in the answer

.142 g/cm^3

convert .00045 mega meters to millimeters

.45 mm

when a solid has the same density as a liquid, the sword will not float on top or sink to the bottom of the liquid. Instead, the seller will become suspended within the middle of the liquid. Now consider that a liquid a solid B have equal densities. If you have a 25 mL and 42 g sample of liquid a what would be the mass of your 15. 0 mL sample of solid be suspended in A

25.2 g

Diamond has a density of 3.5 g/cm³. What did the calculations based on dimensional analysis provides the correct answer for the conversion of this density to pounds per feet cubed

3.5 x (2.54)^3 x (12)^3 / 454

chemistry handbook gives the density of a solid as 2.70 g/cm³. What is the percent error of a density calculation of 2.80 g/cm³ based on my measurements? You significant figures in your answer

3.7%

Convert the following measurement to scientific notation, showing all significant digits; .00400750L

4.00750 x 10^-3 L

perform the following calculation in scientific notation. Use Sigg figs in the answer (2.8 x 10^-4 m) + (3.998 x 10^-2 m)

4.026 x 10^-2 g

divide 4.0 x 10^-2 m by 8.00 x 10^2 m and use the correct number of significant digits and answer

5.0 x 10^-5

what set of calculations based on dimensional analysis provides the correct answer for the following conversion: 50 feet = _____ m

50 x 12 x 2.54 x .01

what set of calculations based on dimensional analysis provides the correct answer for the following conversion; 55.0 L = _____ cm^3

55.0 x 1000

using the rules of significant figures what is the proper solution to the following equation? (14.01 kg +320 kg) x (4.19 m / 2.0 s^2)

7.0 x 10^3

The following length measurements were taken by student using several different measuring devices. Find the average of the measurements. Make sure that your answer is there a correct number of significant figures. 7.92 g, 8.530 g, 7.91 g, 8.10 g, 8.439 g

8.18 g

what set of calculations based on emotional analysis provides the correct answer for the following conversion: 90 km/h = ______ feet per second

90 x 1000 x 100 / 2.54 / 12 / 60 / 60

which of the following choices best explains why small masses and volumes generally have the largest percent errors associated with their measurement

A small amount of error associated with their measurement counts as a larger percent error and it would for larger masses or larger volumes

When 85. 00 g metal piece, a, was immersed in 25 mL of water, the water level rose to 28.0 mL. Similarly when a 5.00 g metal piece, B, was immersed in 25.0 ML of water, the water level rose to 26.5 mL. Compare the density of the metal pieces, A and B

Metal piece B has a greater density

what is the metric system prefix for the quantity 10^ -6

Micro