How many grams of sodium bromide must be dissolved in 400.0 g of water to produce a 0.500 molal solution?

a. 20.6 g

b. 20.0 g

c. 52.1 g

d. 2.00 g

A 12.95 g sample of Mo2O3 (s) is converted completely to another molybdenum oxide by adding oxygen. The new oxide has a mass of 13.82 g. Add subscripts below to correctly identify the empirical formula of the new oxide.

4NH3 (g) + 502 (g) - >6H20g) + 4NOg) What is the enthalpy change for this reaction?

Make the appropriate conclusion. Choose the correct answer below. A. Reject Upper H 0. There is insufficient evidence to indicate blood lactate level is linearly related to perceived recovery at alphaequals0.10. B. Reject Upper H 0.

You determine the ph of an energy drink is 4.33. what is the hydronium ion concentration, [h3o+]?

How does refrigeration keep food fresher? 1) Cold air surrounds food and slows the spoiling process. 2) It speeds up reaction rates within stored food. 3) It slows down reaction rates within stored food. 4) It causes food molecules to stop vibrating.

What can you determine about a substance from the pH value?

How many grams of H2SO4, would be required to react with 0.75 moles of NaOH?

The smallest particle to retain the properties of an element is an?

Calculate the theoretical density of magnesium, an HCP metal, given that rMg = 0.160 nm and V = LaTeX: / frac{/sqrt{3}}{2}/:a^2c

Which is a charectoristic of all waves