General Chemistry Answers

Gallium has two isotopes: gallium-69 and gallium-71. The relative atomic mass of gallium is 69.7. calculate the percent abundance of gallium-71

The rate constant K depends on temperature or color of solvent or atmospheric pressure

In the above question, what is the value of the rate constant if[A]0=0.35 M ?

why is NaI more soluble at 20°c than in 60°c?

What is the initial volume in liters necessary to prepare 2.0 L of a 0.45 M NaCl from a 1.45 M NaCl solution?

At 30°, the volume of a sample of air was 5.8-L. what would be the volume of the air sample if it is heated to 60°C at the same pressure?

A 47.7 g sample of Cu is added to 116 mL of 5.5 M HNO3. Assuming the following reaction is only one that occuts;

Cu(s) + HNO3 ----> Cu(NO3)2 (aq) + H2O(ı) + NO(g)

Will the Cu react completely? What is the limiting reagent and what is the remaining compound in grams? How many grams of copper(II) nitrate will be obtained?

if the chemical activity of metals with oxygen increases from top to bottom then why when burning magnesium strips a strong reaction occurs while the burning of calcium is accompanied by a faint flame

write an equilibrium expression for the reaction of zinc and hydrochloric acid

The volume of a gas is 275 mL at 740 torrs and 25°C. If the pressure is held constant and the temperature is raised to 100°C, what will be it's new volume