the density of a substance is 1.63 g/ml. what is the mass of 0.250 L of the substance in grams.

Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCI) and liquid water (H,O). Suppose 30. g of hydrochloric acid is mixed with 22.3 g of sodium hydroxide. Calculate the minimum mass of hydrochloric acid that could be left over by the chemical reaction. Be sure your answer has the correct number of significant digits. g x10

A 0.231 g piece of solid magnesium reacts with gaseous oxygen from the atmosphere to form solid magnesium oxide.  In the laboratory a student weighs the mass of the magnesium oxide collected from this reaction as 0.309 g.

The sugar industry uses barium hydroxide solution to refine sugar beets. What is the amount concentration of a barium hydroxide solution when 5.43 g is dissolved in 165 mL of water?   Record your numerical answer with the correct number of significant digits in the first answer box and your units in the second answer box.

What is the volume (in mL) of 0.185 M   (sulfuric acid) containing 0.574 g ? Volume =  mL

Saline solution is a sodium chloride solution that is 0.90% mass/volume. How many grams of sodium chloride are needed to make 135 mL of saline solution?

In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass of our sun, but occupying less space than our moon. Suppose that one of these black holes has a mass of 1×10^3 suns and a radius equal to one-half the radius of our moon. What is its density in grams per cubic centimeter? The mass of the sun is 2.0×10^30 kg and the radius of the moon is 2.16×10^3 mi (Volume of a sphere =4/3πr^3)

A student is asked to make up a 16% sodium chloride solution. She makes the solution by weighing an empty beaker (which has a mass of 98.5g). Sodium chloride is added to the beaker. The mass of the beaker and sodium chloride is 114.71 g. Lastly, the student added 84 mL of distilled water to the beaker. Reweighing the beaker she finds that the mass of the beaker, sodium chloride, ad distilled water is 196.14 g. What is the weight percentage of sodium chloride in this solution? Show all work.

Water has a density of 1.00g/mL. How many teaspoons of water are represented by 40,500 molecules of water. Use dimensional analysis.

You want to produce a 50 g sample of glucose by evaporating to dryness a quantity of glucose solution containing 8% glucose by mass. The density of the glucose solution is 1.15 g/mL. What volume of glucose solution, in liters, must be taken for this purpose?