What are three traits that you would like to see disappear as human beings evolve? why?

A sample of Freon-12 (CF2CL2) occupies 25.5 L at 298 K and 153.3 kPa. Find it's volume at STP.

Which of the following is NOT a good way to present data a data table a graph a long list of information

In a double covalent bond, two electrons are shared between two atoms. true or false

An isotope of radon has 86 protons and 137 neutrons. What is the mass number of this isotope?

Consider the following unbalanced reaction for the combustion of hexane: C6H14 (g) + O2 (g) - -> CO2 (g) + H2O (g) Balance the equation and determine how many grams of CO 2 gas will form when 5.35 grams of C6H14 reacts with excess O2.

4. suppose you are setting up a reaction that requires an iodide salt and are planning to use sodium iodide. however, at the last minute you find that you are out of sodium iodide, so you must use potassium iodide instead.

Which of the following is a physical change of matter? A) Roasting marshmallows B) mixing kool-aid and water C) mixing alka seltzer and water D) baking a cake

Calculate [OH-] for each solution. 1. pH = 13.48 Express your answer using two significant figures. 2. pH = 8.19 Express your answer using two significant figures. 3. pH = 2.12 Express your answer using two significant figures.

State whether the following statements are true or false (with justification). (a) 1 mol of N2 has more molecules than 1 mol of Ar. (b) 1 mol of N2 has more mass than than 1 mol of Ar. (c) The molar mass of N2 is greater than the molar mass of Ar

One year ago, you sold a put option on 100,000 euros with an expiration date of 1 year. you received a premium on the put option of $0.04 per unit. the exercise price was $1.22. assume that 1 year ago the spot rate of the euro was $1.