12. Un pedazo de alambre aluminio tiene un diámetro de 0.05082 pulgadas. Calcule la masa, en gramos, 50.0 pies de alambre. La densidad del aluminio es 2.70 g/cm3. (1 pulgada = 2.54 cm; 1
pie = 12 pulgadas)

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

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm