What is the color of bromcresol green indicator in a solution with a pH value of 2.0? (1) blue (2) green (3) red (4) yellow Answer:...

January 2019 Chemistry Regent During which phase change does the entropy of a sample of H2O increase? (1) H2O(g) → H2O(l) (2) H2O(g) →...

We can look at the Regent Reference Table Q, that is titled "Homologous Series of Hydrocarbons" to figure out the answer to this question.

The rate of the reaction is affected by the following factors: 1. Concentration (higher concentration of reactant particles increases the...

Which formula represents an asymmetrical molecule? (1) CH4 (2) CO2 (3) N2 (4) NH3 An assymetrical molecule is a molecule whose charge is...

Rutherford observed two things. First, most of the alpha particles were able to pass through the sheet. Second, some alpha particles were de

The mass of an atom is equal to the protons plus neutrons. Protons and neutrons are particles located inside the nucleus of an atom and give

Which statement describes a chemical property of iron? (1) Iron oxidizes. (2) Iron is a solid at STP. (3) Iron melts. (4) Iron is attracted

All elements on the periodic table (except H and He) follow the octet rule that states that atoms want to have an octet (eight) electrons in

Alkynes are a group of organic molecules that have a triple bond. The formula for alkynes is CnH2n-2, making choice 4 the correct choice. Th