Chemistry first term 21 | Baamboozle - Baamboozle

Perform the indicated mathematical operations and report the answer to the proper number of significant figures. (21.55 x 4.12 ) / 42.42

2.09

Convert 299,000,000 to scientific notation.

2.99 x 10^8

What is the area in square millimeters of a rectangle that is 7.431 cm long and 23.33 mm wide?

173.4 mm^2

What volume is occupied by 16.4 g of mercury? The density of mercury is 13.6 g/mL.

1.21 ml

A unit that is defined by a combination of base units is a(n) ________________.

Derived unit

Solve the following problem with the correct number of significant figures? 5.31 cm + 8.4 cm + 7.932 cm

21.6 cm

Is the length a qualitative measurement of a pencil?

No

How many significant figures are in the following number? 20.308

5

What is this number expressed in scientific notation? 702.0

7.020 x 10^2

What is the SI unit for temperature?

Kelvin

What is the percent error if a measured value is 24.59 g/mL and the accepted value is 25.49 g/mL?

3

What is the percent error if a measured value is 24.59 g/mL and the accepted value is 25.49 g/mL?

3.5%

The closeness of an experimental value to an accepted value is its ______

Accuracy

The sum of 4.824 + 2.03 + 4.72319 + 123.4567 + 111.1 expressed to the proper number of significant figures is ____________.

246.1

What is this number in standard notation? 2.70 x 10^-4

0.00027

Research on solubility as a factor that affects the digestion of foods in humans would be an example of ______________.

Applied research

Research that is conducted for the sake of increasing fundamental knowledge is __________.

pure research

Two items that must be worn during any laboratory experiment are ___________.

safety goggles and a lab apron