An is a testable explanation for an observation

What is the oxidation number of manganese in MnO41-? + 3 + 4 + 7 + 8

An increase in the temperature of reactant causes an increase in the rate of reaction. Which of the following is the best explanation?

A saturated solution of sulfur dioxide is prepared by dissolving SO2 (g) in 100. g of water at 10.°C and standard pressure. Determine the mass of SO2 in this solution. A.) 15g to 18g B.) 40g to 43g C.) 53g to 56g D.) 6g to 8g

If an expirement 5kg of fuel completely burns to produce 1,80,000 kj of heat energy which among the foloowing is its calorofic value a) 40,000 kj b) 35,000kj c) 36,000kj d) 45,000kj

3. Consider the transport of galactose across a semi-permeable membrane from the extracellular space ([galactose] = 2 mM) to the cytosol ([galactose] = 10 mM) under biochemically standard conditions. (R = 0.08206 L atm/mol K = 8.

What happens when light from the sun passes through any type of matter? the light slows down. the light speeds up. most of the light is absorbed. most of the light is reflected.

What is the chemical name for Fe (HCO3) 2

How are protons, electrons, and neutrons correctly compared

You compare two layers to a because the crust and upper mantle are solid

A substance that speeds up the rate of a chemical reaction is called a. a catalyst. b. a lipid. c. a molecule. d. an element.