If a sample of a substance contains 9.03 x 10^23 representative particles, how many moles does this represent?

Which of the following is the least informative property of a mineral? Color Luster Streak Cleavage

Based on the nebular Theory, which of these is a step in the formation of a new planetary system? A) evaporation of water B) nuclear fission of gases C) repulsion of gaseous masses D) change of gases into liquids

Enter your answer in the provided box. The pH of a bicarbonate-carbonic acid buffer is 5.41. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-). (Ka1 of carbonic acid is 4.2 * 10-7.)

Which diatomic molecule is formed when the two atoms share six electrons

A mixture of methanol (Mw = 32.04 g/mol) and ethanol (Mw = 46.07 g/mol) has an average molecular weight of 43.01 g/mol. What is the mol fraction of methanol in this mixture?

How are real gases different from ideal gases?

Which one doesnt belong in the list below? A. a meter B. one liter C. One centimeter D. one kilometer

Which elements did curies discover

When rubidium metal is exposed to air, two atoms of rubidium, Rb, combine with one atom of oxygen. If 1.98 grams of rubidium is exposed to air, what will be the mass of the product in grams

Fission reactions can get of of control without what taking place?