Which particles form the nucleus of an atom? a. protons and electrons b. protons and neutrons c. positrons and electrons d. positrons and neutrons

Is carbon tetrafluoride a polar molecule?

How many moles are there in 17.6 g NaOH?

1. What type of compound is Al2 (SO4) 3? a. ionic b. metallic c. polyatomic d. covalent

A conjugate acid is the species that a. remains after a base has given up a proton. b. is formed by the addition of a proton to a base. c. is formed by the addition of a proton to an acid. d. remains after an acid has given up a proton.

What is this volume (2.49 * 104 L) in cubic meters?

The word atom means invisible?

A pycnometer weighs 25.60 g empty and 35.55 g when filled with water at 20°C. The density of water at 20°C is 0.9982 g/ml. When 10.20 g lead is placed in the pycnometer and the pycnometer is again filled with water at 20°C, the total mass is 44.83 g.

How does weathering affect the surface area of a rock? Explain your answer.

How would each of the following procedural errors affect the results to be expected in this experiment? Give your reasoning in each case. (A) Not all of the liquid was vaporized when the flask was removed from the water bath.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?