What is the percent by mass of oxygen in H2SO4? [formula mass = 98] (1) 16% (3) 65% (2) 33% (4) 98%

In electrolysis, why do we keep the electrodes the same?

List four observations that indicate that a chemical reaction may be taking place

A driver with a nearly empty fuel tank may say she is "running on fumes." If a 15.0 gallon automobile gas tank had only gasoline vapor remaining in it, what is the farthest the vehicle could travel if it gets 20.

How many moles of O2 are necessary to react with 42g of C2H2?

1Na2+1Hcl---> 1Nacl+1h2s balanced

Consider the elemts Ca, Ba, As, and Bi. Which has the ... largest radius? highest electronegativtity? Highest Ionization Energy?

How do guys Make sperm?

Maya's playroom is 12 m2. The length of the room is 3 m. What is the width? 4 m 8 m 15 m 36 m

How many moles of each element are in this sample p2o3

Does uranium or barium nucleus have a stronger net force holding its protons