PLEASE HELP DUE IN A FEW MINUTES THIS IS SCIENCE BTW! If 2 grams of substance a react completely with 3 g of substance be what must be true about the products?

2A + IB — 3C+ ID

A. 1 gram of substance B is left over

B. 2 moles of substance A are used

C. 4 grams of products are produced

D. 4 moles of products are produced

E. 5 grams of products are produced

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

1. list three scientific reasons cockroaches may fly.