How many joules are in 148 calories? (hint: 1 cal = 4.18 j)

What mass of KBr (in grams) should you use to make 150.0 mL of a 1.70 M solution of KBr?

A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the molarity of the solution? Show your work.

Why nucleus is stable?

Model in which electrons are found in fixed levels around the nucleus and require energy to move from level to level: a. Bohr model c. Quantum mechanical model b. Rutherford model d. Free-electron model

What is the full ionic equation for CuCl2 and (NH4) 2SO4?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda