How do I pass chemistry?

In the periodic table of elements, what do all of the elements in row 2 have in common?

What is one reason the government plays a role in the economy?

What is the greatest amount of ammonia (NH3) in moles that can be made with 4.7 mol N2 and 6.9 mol H2? Which reactant is limiting? How many moles of excess reactant will be left after the reaction?

Why can't subscripts be changed in chemical formulas

Calculate the density of a block of water measuring 2 cm x 4 cm x 1 cm, with a mass of 5.4

The molar mass of carbon is 12.01 g/mol. what is the mass of a 1.0 ' 109 carbon atoms?

The atomic mass oftitanium is 47.88 atomic mass units This atomic mass represents the 1) total mass of all the protons and neutrons in an atom of Ti 2) total mass of all the protons, neutrons, and electrons in an atom of Ti 3) weighted average mass

What does polar and nonpolar mean in science

Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures.

What is the percent yield if 4.65 g of copper?