A 1.25 g sample of an unknown gas at 39 ∘ C and 1.05 atm is stored in a 1.35 L flask. What is the density of the gas?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

The arrangement of particles is most ordered in a sample of

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ