Mechanical weathering does not change

A. the size of the rock

B. the chemical composition of

C. the rock the shape of the rock

D. the original weight of a rock

What is the relationship between concentration and rate of reaction? not related directly proportional inversely proportional partially related

a compound is found to have 46.67% nitrogen, 6.70% hydrogen, 19.98% carbon and 26.65% oxygen, what is the empirical formula?

The average bond enthalpy for c-h is 413 kj/mol. 413 kj of energy is required to break a mole of ch into atoms: ch (g) →c (g) + h (g), δh=

Theoretically, a student performing a lab experiment was expected to get 9 g of product. Instead, the student obtained only 7.8 g. What is the percent yield of the reaction performed by the student?

Which of these pure elements would be dangerous to hold in the palm of your hand? a. sodium b. zinc c. sulfur d. gallium

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.