Given the following equation, what is the correct form of the conversion factor needed to convert moles of O2 reacted to the number of moles of Fe2O3 produced? 4 Fe(s) + 3 O2 (g) –> 2 Fe2O3 (s)

What is the coefficient of hydrogen H2 when the following equation is balanced? Al (s) + H2SO4 (aq) –> Al2(SO4)3 (aq) + H2

The force of the collisions of gas molecules against the walls of a container is called

What coefficient placed in front of O2 is needed to complete balancing of the following equation? C5H8 (l) + ? O2 (g) –> 5 CO2(g) + 4 H2O (g)

When solutions of KCl and Pb(NO3)2 are mixed, a precipitate forms. Which of the following is the net ionic equation for the reaction that occurs?

Which of the following gives the correct numbers of protons, neutrons, and electrons, respectively, in a neutral atom of  Sn?

EXTRA CREDIT The following electron configurations contain a coded word. [Xe] 6s² 1s²2s²2p63s1 [Ne] 3s1 1s²2s²2p63s23p4 The coded word is (use all lowercase letters)

How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg in the following reaction 2 Mg (s) + O2 (g) –> 2 MgO (s)

An element has two naturally occurring isotopes. One isotope has a mass = 35.0 amu and makes up 24.2% of the sample, the other isotope has a mass = 37.0 amu and makes up 75.8% of the sample. What is the average atomic mass for this element?

What is the symbol of the element in Group 4A (14) in Period 2?