What it means to be skeptical

The first four ionization energies for element X (not in kJ/mol) are 170, 350, 1800, 2500. The first four ionization energies for element Y are 200, 400, 3500, 5000. Identify elements X and Y. (There may be more than one correct answer)

If 14.8 moles of fe2o3 (s) and 8.93 moles of co (g) are allowed to react, and the percent yield is 56.6%, how many moles of fe3o4 (s) will actually be produced?

Which of the following descriptions about standard addition and internal standards are NOT correct? a) Internal standard is useful when the matrix in the unknown is complicated.

1. What do the arrows in a food chain or food web represent?

What is the temperature of 12.2 moles gas in a 18.35 l tank at 16.4 atm? express in K and C.

Which type of fault is under compression

Expressing concentrations in terms of molarity is especially convenient since it allows one to count chemical particles by measuring

If the average American throws away 4.5 lb of trash each day, and the population of the US is estimated to be 311 million people, calculated the number of metric tons of garbage thrown away in the US each year.

Difference between radical and compound

Water is a produced when 30.0 grams of hydrogen reacts with 80.0 grams of oxygen what is the limiting reagent