Descriptive investigations involve collecting data about a system, but not making which one?

A) Observations

B) Measurements

C) Comparisons

D) Conclusions

At room temperature and pressure what is the volume of one mole of oxygen?

The wittig reaction involves coupling between a phosphonium ylide and a carbonyl-containing molecule. if a chemist wants to use the wittig reaction to synthesize 2-methyl-2-butene, which reactants should be used?

Convection transforms thermal (heat) energy into what type of energy?

At constant temperature, a sample of helium at 760. torr in a closed container was compressed 5) from 5.00 L to 3.00 L, with no change in amount of gas or temperature.

Express the concentration of a 0.0390 M aqueous solution of fluoride, F -, in mass percentage and in parts per million (ppm). Assume the density of the solution is 1.00 g/mL.

What quantity of heat is needed to raise the temperature of 5.0g of a substance from 20 c to 30 c if the specific heat?

Compare mechanical energy and thermal energy.

How many covalent bonds can each carbon atom form?

Hich element is likely to be the most brittle? a. selenium b. cobalt c. platinum d. zinc

What units should they have used in order to make the correct conversion