How much heat is absorbed during production of 112g of NO by the combination of nitrogen and oxygen?. N2 (g) + O2 (g) →2NO (g), ΔH = + 43 kcal/mol

If a solid forms when two ionic solutions are mixed together in a test tube, what does this indicate?

Which of the following statements is true? Evaporation is the main way water enters the atmosphere. Condensation is the opposite of evaporation. The total amount of water on the earth stays the same. all of the above

On the pH scale, a solution with a pH of 7 would be classified as which of the following? A weak acid, weak base, neutral, or pure H2O?

Is NaI a ionic or covalent

New nuclei and neutrons result from: a. nuclear fusion b. the release of electrons from a positively charged atom c. the splitting of an atom s nucleus d. the splitting of an atom s neutron

What was concluded about the structure of the atom as the result of the gold foil experiment? (1) A positively charged nucleus is surrounded by positively charged particles. (2) A positively charged nucleus is surrounded by mostly empty space.

Andre is predicting the products of chemical reactions. In one reaction, a hydrocarbon is the only reactant. What is the best prediction and explanation of this reaction? Two new compounds form as the hydrocarbon undergoes a synthesis reaction.

What evidence is there that electrons move around in definite pathways around the nucleus? What evidence is there that electrons m

Are greenhouse gases good for us?

How to convert metric units?