Perform the calculations below and give the results with correct significant figures. 31.816 g + 4.23 g + 0.097 g = 3.48 m × 5.916 m × 19.27 m = (0.0451 × 2.007 × 104) − (28.16 ÷ 0.874) =  g  m3

A student experimentally measured the density of gold as 19.98g/cm^3. A handbook reports a value of 19.32g/cm^3. Calculate the percent error in the student’s measurement.

A chemist must prepare 275.mL of 25.0mM aqueous barium chlorate BaClO32 working solution. He'll do this by pouring out some 54.9mM aqueous barium chlorate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL  of the barium chlorate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits.

Suppose you are trying to find the volume of a box based on the given measurements for the length, width, and height of the box, where the height was measured in two parts.      length, l = 2.20 in      width, w = 3.71 in      height, h = 10.4 in + 1 in Calculate the height, ℎ, of the box, first keeping all digits, then rounding to the proper number of significant figures. unrounded h = ____in rounded h =____  in  Calculate the volume (V) of the box using V =l x w x h. Round to the proper number of significant figures.  v=_____in3

A chemistry student weighs out 0.117 g of hypobromous acid (HBrO) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1600 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Be sure your answer has the correct number of significant digits. mL 0 x10 X

In some polluted city air the amount of lead was measured at 3.1 x 10^-6 g/m^3. What is the amount of lead in nanograms per cubic centimeter

(282.7×105)−(1.100×103)]×2.8990 Express your answer to the appropriate number of significant digits.

A chemist prepares a solution of calcium bromide (CaBr₂) by measuring out 470. g of calcium bromide into a 350. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's calcium bromide solution. Round your answer to 3 significant digits. mol/L X 5

Suppose 1.06 g of sodium chloride is dissolved in 200. mL of a 78.0 m M aqueous solution of silver nitrate. Calculate the final molarity of chloride anion in the solution. You can assume the volume of the solution doesn't change when the sodium chloride is dissolved in it. Be sure your answer has the correct number of significant digits. M ■ x10 X 5