Calculate the molar mass for HCN.

0.2703 g/mol

2.703 g/mol

27.03 g/mol

270.3 g/mol

I don't understand periodic trends for ionization energy and atomic radius.

How does temperature affect the rate of a reaction? A. Increasing the temperature decreases the potential energy of the reactants. B. Increasing the temperature gives the molecules more kigetic energy C.

Water has a density of 0.997 g/cm^3 at 25 degrees C; ice has a density of 0.917 g/cm^3 at - 10 degrees C. (question part a) If a soft drink bottle whose volume is 1.

How does the average atomic mass of an element differ from the mass of an individual atom of the same element?

Ozone decomposes to oxygen according to the equation 2o3 (g) ⟶3o2 (g).2o3 (g) ⟶3o2 (g). write the equation that relates the rate expressions for this reaction in terms of the disappearance of o3 and the formation of oxygen.

Which sequence represents a correct order of historical developments leading to the modern model of the atom?

If you were designing a pot to cook spaghetti in, which parts would you make from good conductors of heat? which parts would you make from insulators? explain your answer.

1. Starting with 9.3 moles of O2, how many moles of H2S will be needed and how many moles of SO2 will be produced in the following reaction? SHOW YOUR WORK! 2 H2S + 3 O2 - > 2 SO2 + 2 H2O

What is the oxidation state of an individual sulfur atom in so42-?

If the partial pressure of a gas over a solution is halved, how has the concentration of gas in the solution changed after equilibrium is restored?