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An unstable nucleus which starts a decay process is called the parent nuclide. True False

Because of friction A) energy is NOT always conserved. B) NOT all potential energy is converted to kinetic energy. C) all of an object's kinetic energy turns into potential energy. D) all of an object's potential energy turns into kinetic energy.

A sample of an unknown compound is vaporized at 190.°C. The gas produced has a volume of 2160. mL at a pressure of 1.00atm, and it weighs 2.87g.

Why are some substances not able to dissolve in water a) the solute and solvent are not able to react together b) that attraction between the solute and solvent is not very strong c) the chemical bonds in the solvent are too strong to be broken d)

12. Which of the planets in the solar system seems most like Earth? Which seems most different? Explain your answers using facts about the planets.

At a certain temperature, 0.4011 mol of N 2 and 1.501 mol of H 2 are placed in a 3.00 L container. N 2 (g) + 3 H 2 (g) - ⇀ ↽ - 2 NH 3 (g) At equilibrium, 0.1801 mol of N 2 is present. Calculate the equilibrium constant, K c. K c =

Which of the following is the correct name for the compound hgs? mercury sulfide mercury (i) sulfide mercury (ii) sulfide mercury monosulfide?

You are given 60 ml of 2.0 m naoh solution. how many ml of 6.0 m hcl solution is needed to completely neutralize the naoh solution? s

45 2.0 2. How many joules of heat are needed to raise the temperature of 048 kg of aluminum from 21°C to 94°C, if the specific heat of aluminum is 900 J/g °C?

Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Note: you are writing the molecular, and not the net ionic equation. → CaCl2 (aq) + H20 (l)