What mass of hydrogen is produced from the reaction of 50.0 g of Mg and 75.0 g of HCl? How much of the excess reagent is left over?

Mg + 2HCl → MgCl2 + H2

Which contains more molecules of water. 5 liters of ice at 0 degrees Celsius or 5 liters of water at 0 degrees Celsius.

Do you think that there is a high correlation between proficiency in mathematics and proficiency in chemistry? Explain why or why not. Use details about the components of each field to support your answer.

Why are different units of measurement used for distances in space

in 1650 an individual calculated that the earth was about 6000 years old since then what has happend to scientists estemates of the earth age

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Which formula can represent hydrogen ions in an aqueous solution? OH - (aq) Hg2^2 + (aq) H30 + (aq) NH + (aq)

A gas has a temperature of 14 degrees C and volume of 4.5 liters. If the temperature is raised to 29 degrees C and the pressure is not changed, what is the new volume of the gas? .

How much heat is needed to raise the temperature of 50.0 g of water from 4.5 ⁰C to 83.0 ⁰C?

How does temperature affect the rate of a reaction? A. Increasing the temperature decreases the potential energy of the reactants. B. Increasing the temperature gives the molecules more kigetic energy C.

Who thought everything was made from fire, earth, air, and water? A. Ancient Egyptians B. Democritus C. Socrates D. Aristotle SUBN