3.6 grams of boron react with 1.0 grams of hydrogen to give 4.6 grams of BH3.

How many grams of boron would react with 3.3 grams of hydrogen?

Which is the best definition of activation energy? the energy required to end a chemical reaction the energy required to bind a substrate to an active site the energy required to break the bonds of reactant molecules the energy required to re-form

Which statement describe the charge of an electron and the charge of a proton

Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element? A. Isotope number B. Atomic number C. Atomic mass unit D. Mass number

A force of 20N acts upon a 5kg block. calculate the acceleration of the object.

What is the Molar mass of SO

How much greater is the energy produced by a fusion reaction compared to a chemical reaction?

True or false. A bond between a metal atom and a nonmetal atom is likely an iconic bond

What is a precipitate? It is a liquid that forms from solution during a chemical reaction. It is a reactant that forms from solution during a chemical reaction. It is a solid that forms from solution during a chemical reaction.

The electron configuration for an atom is 1s22s22p2. How many electrons does the atom have? 4 2 6 5

When a piece of sodium carbonate reacts with dilute HCl, a gas X is produced. When gas X is passed through lime water then the solution turns milky and a white precipitate Y is formed a. Write the chemical formula of X, Y and (3) b.