What element is oxidized in the following reaction?

HNO3 + Cu yields Cu (NO3) 2 + NO2 + H2O

a. Cu

b. H

c. N

d. O

How many different naturally-occurring common amino acids are there?

Read the following chemical equation. Cl2 (g) + K + Br - → K + Cl - + Br2 (g) What most likely happens during this reaction? Potassium loses an electron. Potassium gains an electron. Bromine loses an electron. Bromine gains an electron.

What happens to the number of molecules in an object as it is heated up

The chemical formula of an oxide of an element is A2O5 state the Valency of A also write the chemical formula of its chloride

Which statements about a neutral atom are correct? Check all that apply. The positively charged particles in the nucleus are positrons. The radius of the electron cloud is twice as large as the radius of the nucleus.

What is an example of making a qualified observation

With respect to composition, how is the compound made from hydrogen and oxygen different from mixtures of these two elements?

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.