How many grams of hydrogen are needed to produce 1.80g of water according to this equation 2H2+O2 = 2H2O

A scientist carries out a reaction twice. In Trial A, the scientist combines the reactants in a container. In Trial B, the scientist combines the reactants in the same container, but she also adds a catalyst.

You have a ballon filled with hydrogen gas which keeps it at a constant pressure, regardless the volume. The initial volume of the gas is 736 mL at 15.0 C. The gas is heated until it's volume is 2.

Which mixture contains visible particles that settle out unless the mixture is stirred yahoo?

Which of the following is true concerning gamma radiation? A. The mass number of the radioisotope decreases by four. B. The atomic number of the radioisotope decreases by two. D. Neither the mass number nor the atomic number changes.

A globe is placed on your desk and you are asked to identify its physical properties. How would you describe the globe?

Atoms of the least reactive elements tend to have

How many total atoms of carbon, c, are contained in 5 c6h12o6?

Did alkali matels react with acid

How many atoms are in nickel

What happens whentwo gases from a liquid like hydrogen combine with oxygen to form water