Is the knowledge and tools that people use to manipulate their environment. a. Ethnocentrism c. Diffusion b. Technology d. Reformulation

What is the solubility of NH4Cl at 50°C?

What is the formula for barium nitride trihydrate

Equilibrium is established in a reversible reaction when: a) the [product] = [reactants] b) rate of reaction of products = rate of reaction of reactants c) all the reactants dissolve or dissociate d) when product are no longer produced

A base has a. no hydrogen ions. b. few hydrogen ions. c. no hydroxide ions. d. few hydroxide ions.

Is a neutral Atom has a mass of 12 amu an atomic number of 5 determine the number of protons neutrons and electrons in the Atom?

For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?

Attempt 2 A sample of gas contains 49.16 % N 2 gas, 19.85 % Br 2 gas, 9.95 % CO 2 gas, and 21.04 % of an unknown gas. The average atomic mass of the gas mixture is 50.71 u. Calculate the atomic mass of the unknown gas.

A chemist determined by measurements that. 040 moles of gold participated in a chemical reaction. calculate the mass of gold that participated in the chemical reaction. round your answer to significant digits.

10) A screwdriver has the density of 5.5 grams per cubic centimeter. It also has the mass of 2.3 grams. What is the screwdriver's volume?

A chemist weighed out 20.7 g of sodium. Calculate the number of moles of sodium she weighed out