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A regular spherical Styrofoam with a diameter of has a mass of . What is its density?

Bernadette is experimenting with an unknown liquid. She filled a  beaker with the liquid and weighed it. She then recorded the mass as   . If the beaker is   when it is empty, what liquid is she experimenting on? Refer to the following densities of liquids.

Liquid	Density ()
Acetic Acid	1.0497
Glycerol	1.2582
Heavy Water	1.1100
Hydrazine	1.0040
Sulfuric Acid	1.8305
Toluene	0.0520
Water	0.9970

A  rectangular prism is half-filled with a salt solution. It is then weighed, and the mass recorded is . Determine the density of the salt solution in grams per cubic centimeter.

What is the volume of an irregular gold solid weighing   if the gold’s density is ?

Given the concentration of water is . Determine the density of the solution. 

Determine the temperature and the number of significant figures. 

Determine the difference in the volume in a burette before and after titration.

Before                                                         After

Determine the unit of   , the rate constant in the rate law of a second-order chemical reaction:

where the unit of rate is ,   is  .

A geodetic engineer was tasked to measure the area of a trapezoidal piece of land. The longer base is while the shorter base is . In addition, the height is measured as . What is the area of the land calculated by the engineer? Express your answer with the proper number of significant figures.

Calculate the volume of the rectangular prism with the following dimensions:  . Express your answer using the proper number of significant figures.

The formula for the calculation of the surface area of a cylinder is given as: . Suppose a cylinder has a radius of  and a height of , calculate the surface area of the cylinder. Use the appropriate number of significant figures.

A ruler with the smallest unit of  was used to measure the length of a wire to be used in an experiment. Which of the following measurements are reported correctly according to the proper number of significant figures?

During an experiment, 5 junior high school students have measured the volume of a liquid at different moments. Their measurements were listed below. What is the mean of the measurements? Express your answer using the proper number of significant figures.

Which of the following statements is/are true in determining the number of significant figures?

I - Zero digits are always insignificant.

II - A final zero or trailing zeroes are significant after a decimal point ONLY.

III - The result of addition or subtraction must possess the same number of significant figures as the quantity that bears the least amount of significant figures.

IV - Any non-zero digit after the decimal point is insignificant.

V - The result of multiplication or division must possess the same number of decimal places as the quantity that bears the least number of figures after the decimal point.