4. The mass of a single proton is approximately 1.67 x 10-27 kg. The mass of an electron is

approximately 9.11 x 104 kg. How many times bigger is a proton than an electron?

How many grams of silver oxide are needed to react with 7.9 g of hydrochloric acid produce silver chloide and water?

Describe how fission produces electricity at nuclear power plants.

A (n) Blank is an abbreviation for the name of an element ans usully has either one or to letters

If the first isotope has a mass of 259.98 amu and a percent abundance of 35%, what is the percent abundance of the second isotope?

What are chemical reactions?

Bacteria are only found in decaying matter. A. True B. False

Which is considered a chemical mutagen? tanning beds tobacco X-rays precious metals

Combining 0.380 mol Fe2O3 with excess carbon produced 13.7 g Fe Fe2O3 + 3C → 2Fe + 3CO What is the actual yield of iron in moles? What is the theoretical yield of iron in moles? What is the percent yield?

When a hydrogen electron makes a transition from n=3 to n=1?

If two electrons have same number of protons but different number of neutrons can they be atoms of the same element?