What is a substance used to increase the rate of a chemical reaction but it itself is not used up in the process?

Which term describes the degree to which an element attracts electrons? view available hint (s) which term describes the degree to which an element attracts electrons? oxidation. reduction. electronegativity. polarity?

Ammonia reacts with oxygen according to the equation 4NH3 (g) + 5O2 (g) →4NO (g) + 6H2O (g),ΔHrxn=-906 kJ Calculate the heat (in kJ) associated with the complete reaction of 155 g of NH3.

A 2.5 mg sample of magnesium powder is ignited with 2 mg oxygen in a sealed container. All of the magnesium is consumed and 4.15 mg of white solid magnesium oxide is formed. Find the mass of the unreacted oxygen

Enter ionic and net equations: feso4 (aq) + na3po4 (aq) arrow fe3 (po4) 2 (s) + na2so4 (aq)

Which of the following atoms has the highest electronegativity? (optional) use the periodic table to answer this question a. C b. N c. O d. F

If 0.360 J of heat is added to 0.7402 g of water, how much will the temperature increase?

Which of the following are properties of mechanical waves?

Why LDL called "bad" cholesterol?

What is the best explanation for the observation that h2o is a liquid at room temperature and h2s is a gas at room temperature? quizlit?

What's 5 type of energy