7) Determine the number of tin atoms in 7.5 moles of tin.

The molar mass of tin is 118.71 g/mol

Which event cause massive coastal flooding A. a hurricanes wind B. a tornado C. A tsunami D. a landslide

Grinding wheat in to flour is a a. physical change b. chemical change

How is the wiring done in houses and other occupied buildings? O A. It is in series, so it is easy to tell when something isn't working. B. It is in parallel because it uses less energy. C. It is in series, so it is easy to shut off. D.

When molten rock undergoes crystallization above ground, what type of rock results?

Water is a great solvent. For example, it causes ionic compounds like sodium chloride (table salt) to dissociate. One of these reasons that water does is because it is polar molecule.

A certain element x has four isotopes. 5.845% of x has a mass of 53.93961 amu. 91.75% of x has a mass of 55.93494 amu. 2.123% of x has a mass of 56.93539 amu. 0.2820% of x has a mass of 57.93328 amu. what is the average atomic mass of element x?

Which of the following is a type of electromagnetic radiation? a. Electrons b. Neutrons C. Electromagnetic waves d. Helium nuclei

Which formula can represent hydrogen ions in an aqueous solution? OH - (aq) Hg2^2 + (aq) H30 + (aq) NH + (aq)

A gas has a temperature of 14 degrees C and volume of 4.5 liters. If the temperature is raised to 29 degrees C and the pressure is not changed, what is the new volume of the gas? .

How much heat is needed to raise the temperature of 50.0 g of water from 4.5 ⁰C to 83.0 ⁰C?