Which pair of elements will form an ionic bond?

N and O

K and Br

C and Cl

Fe and Ni

What is the mass of a sample of iron if that sample lost 2300J of heat energy when it cooled from 80 oC to 30°C? The specific heat of iron is 0.449 J / g °C.

The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy. If the rate constant of this reaction is at, what will the rate constant be at?

why is it that when you use an expression for work you don't use the - VdP but when you use an expression for dH you use PdV and VdP in it?

Determine the concentration of sulfuric acid that needed 47 mL of 0.39M potassium hydroxide solution to neutralize a 25 mL sample of the sulfuric acid solution?

Find the density of a material given that a 5.03 g sample occupies 3.24 mL

Which has a larger atom calcium or barium?

When a spring is compressed, the energy changes from kinetic to potential which best describes this change?

Which of the following elements is classified as a nonmetal Xe Ca Sb Cu

What two quantities does the AVEE measure

A compound is made of copper, nitrogen, and oxygen atoms. A sample of the compound has 6.4 grams of copper, 2.8 grams of nitrogen and 9.6 grams of oxygen. The compound has a molar mass of 188 g/mol. Write the name and formula of the compound.