In the chemical equation Zn + 2HCl ZnCl2 + H2, the reactants are

A. zinc and hydrochloric acid.

B. zinc and hydrogen carbonate.

C. zinc chloride and hydrogen.

D. zinc chlorate and water.

What is an endothermic reaction? O A. A reaction that produces heat O B. A reaction that uses radiation waves C. A reaction that absorbs heat O D. A reaction that contains enthalpy

Which of the following fractions can be used in the conversion of 500 mL to the unit m3?

Sodium hydroxide, NaOH; sodium phosphate, Na3PO4; and sodium nitrate, NaNO3, are all common chemicals used in cleanser formulation. Rank the compounds in order from largest mass percent of sodium to smallest mass percent of sodium.

Which two conditions can limit the usefulness of the kinetic molecule or theory in describing gas behavior

Which locations contain carbon? seafloor sediment atmosphere living organisms rocks soil

Recycling one ton of paper is the equivalent of approximately how much of the following? a.) all of the below b.) 460 gallons of oil c.) 6950 gallons of water d.) 590 pounds of air pollution

What is the best way to compare a concentrated solution to a dilute solution, given the same volume of solution? A. The concentrated solution has less solute than the dilute solution. B.

What is the mass number of an isotope

A sample of sodium reacts completely with 0.284 kg of chlorine, forming 468 g of sodium chloride. What mass of sodium reacted?

Is it true or false that gamma rays have no mass and no electrical charge