. A sample of limestone weighing 1.034 g is dissolved in 75.00 mL of 0.2500 M hydrochloric acid. The following reaction occurs: CaCO3 (s) + 2H+ (aq) → Ca2+ (aq) + CO2 (g) + H2O (l) It is found that 19.66 mL of 0.1600 M NaOH is required to titrate the excess HCl left after reaction with the limestone. What is the mass percent of CaCO3 in the limestone?

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

What is the molar mass of a gas that has density of 2.054 g/l

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?