A sample of magnesium is burned in oxygen to form magnesium oxide. What mass of oxygen is consumed if 74.62 g magnesium oxide is formed from 45.00 g magnesium

How did the experiement with boiling water compare with the experiment in which magnesium was added to hydrochloric acid? Both resulted in gas formation. Both resulted in temperature change. Both involved chemical change.

The octet rule pertains to: a. only the noble gases. b. only groups 1A and 2A. c. elements in Groups 1A - 7A. d. all elements in the periodic table.

Why openness is important to the progress of science?

Is there a difference between a homogenouos mixture of hydrogen gas and oxygen gas, and a sample of vapor? explain?

A 455 g piece of bopper tubing is heated to 89.5 C and placed in an insulated vessel containing 159 g of water at 22.8 C. Assuming no loss of water and a heat capacity of 10. J/K for the vessel, what is the final temperature (c of copper = 0.

Which burns faster, a large log or the same log cut into small sticks of wood? 1. neither, both burn at the same rate 2. small sticks of wood 3. a large log

What types of cells in your body are no longer undergoing mitosis

What is the solubility of nitrogen and calcium nitrate in cyclohexane?

Carbon exists in nature as three isotopes. Given the atomic masses and relative abundance of the isotopes, what is the average atomic mass of carbon?

What is the correct value for Avogadro's number? A. 6.022 x 10^23 B. 6.023 x 10^22 C. 6.022 x 10^33 D. 6.022 x 10^2.3 E. none of the above