One nucleus contains 31 protons and 40 neutrons. Another nucleus contains 31 protons and 41 neutrons. What can you conclude about the identity of these nuclei?

Write and balance the equation for the complete combustion of acetylene, C2H2. You do not need to include any phase symbols or energy changes.

Which of the following symbols could represent an atom of an element

A chemist has synthesized two new dyes based on the molecular structure of plant-based dyes. The lowest energy absorption line for the first dye is light in the visible region at 530 nm.

I'm working on a P1V1=P2V2 problem. I have all the information in and is has equaled 146.686235. Would I round this to 147 or 146.69 or neither?

Which of the following is a characteristic of nonmetals? Nonmetals do not conduct electricity. Nonmetals are often shiny and hard. Nonmetals are often malleable. Nonmetals are often ductile.

In the reaction, HCl + H2O produces H3O + Cl, what is the conjugate acid

Draw the curved arrow mechanism for the conversion of aniline into benzenediazonium ion, and draw the final product that forms after the benzenediazonium ion is treated with

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g