Calculate the mass in grams of 256 mL of acetone ( density =0.791g/mL).

K; = 2.30 х 10 26

X, Mass of sample (g) = 0.7 Y, Mass of benzoic acid (g) = 0.3 Z, Mass of pellet (g) = 0.9 calculate the follwing below information   Mass of sample in pellet =   Mass of benzoic acid in pellet =

How many mg of iron (MM = 55.845 g/mol) are in 15.00 mL of a solution that contains 2.130 mg Fe/liter?  Report your answer to the correct number of significant figures in standard notation (i.e.- not scientific notation).  Omit the units

210 mg glucose per 100 ml blood. Avg body contains 11 pints, how many grams glucose. 1 pt = 473.176473 ml

III. Perform these calculations and express the result with the proper number of significant figures. a. (4.850 g – 2.34 g)/1.3 mL b. (4.66 x 10-3) × 4.666 c. 0.003400/65.2

What volume of iron (7.87 g/cm3) would be  required to balance a 1.25 cm3 sample of lead (density 11.4 g/cm3) on a two-pan laboratory balance?

Bud N. Chemist must determine the density of a mineral sample. His five trials yield densities of 5.15 g/cm3, 4.83 g/cm3, 5.08 g/cm3, 4.97 g/cm3, 5.12 g/cm3. Independent studies found the correct density to be 5.06 g/cm3. Which of the following is incorrect? a. The mean of his analysis is 5.03 g/cm3 indicating an error of 0.03 g/cm3 from the correct density B.His data has a standard deviation of 0.017 g/cm3 C.His data has a relative standard deviation of 2.60% D. He can report his analyzed density as 5.0±0.2 g/cm3 at a 95% confidence level E. The true value (population mean) is found within the confidence interval of Bud’s work

A vinegar sample has a density of 1.006g/mL and contains 5.4% acetic acid by mass.Calculate the number of grams of acetic acid in 1.00L of this vinegar.

tion 24 of 27 An empty beaker weighs 31.99 g.31.99 g. When completely filled with water, the beaker and its contents have a total mass of 405.55 g.405.55 g. What volume does the beaker hold? Use ?=1.00 g/mLd=1.00 g/mL as the density of water. volume:   mLmL How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mercury is ?=13.5 g/mL.d=13.5 g/mL. total mass: