What is the electron configuration of an element with atomic number 20?

Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide. How many grams of iron are produced if 13.0 moles of hematite react with 38.0 moles of carbon monoxide?

Calculate the number of SO2 molecules formed when 14 S8 molecules and 184 O2 molecules react

The concentrations of Fe2 + and o-phen used in an experiment were 0.00136 M and 0.00407 M, respectively. If a student found a stoichimetric volume ratio of 2.0 mL o-phen to 1.

How can you use evidence to determine if a change is physical or chemical?

What is the oxidation number of chromium in the chromate ion, CrO42-

What is a Boitic factor

What would the partial pressure of water vapor be if you included this gas in the problem and it gave a total of 1.03atm? 0.01 atm 0.03 atm 1.03 atm

Define a balance equations:

What is the best description of the Bohr model of the atom? The atom consists of a positively charged material with negatively charged electrons embedded within it. The atom consists of a nucleus with electrons orbiting randomly around it.

What is a slogan for sulfur that rhymes