What it the main difference between an ionic and a covalent bond?

A 1.00-g sample of octane (C8H18) is burned in a bomb calorimeter that has a heat capacity of 5.80 kJ/°C. The temperature of the calorimeter rises from 25.00oC to 33.20oC. What is ΔU per mole for the combustion of octane?

How many different sets of equivalent protons are there for para-xylene (1,4-dimethylbenzene) ? only 1 two three four?

What is meant by the term sensitivity in Analytical Chemistry? (a) The term refers to the limit at which the absorption instrument could be recorded (b) The slope of the calibration curve or a function of analyte concentration or amount.

How many electrons can the innermost shell of an atom have? a. 0 b. 2 c. 4 d. 6 e. 8?

What group of elements is the least reactive? A. halogen B. alkali metals C. Noble gases D. Semiconductor

Which student is determining the atomic mass of sodium?

Ionic compounds can conduct electricity when dissolved in water or melted, because a. the ions are free to move. b. they have no ions to contribute to the solution. c. the ions are fixed in place. d. they have shared electrons.

What does the number next to the ion signify?

Write a molecular equation for the precipitation reaction potassium chloride and lead (II) acetate

Which outcome is not caused by gravitational force?