Ethylene glycol (C2H6O2) is used as an antifreeze. What mass of ethylene glycol should be added to 5.00kg of water to lower the freezing point to -5.00C. (Ethylene glycol is nonelectrolyte, Kf(H2O)=1.86 degree celsius kg/mol

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Select all the correct answers. which compounds have the empirical formula ch20? (multiple answers)a. c2h4o2b. c3h603c. ch2o2d. c5h1005e. c6h1206

All of the following are homogeneous mixtures except a) sugar dissolved in water. b) orange juice. c) coffee with cream. d) household vinegar. e) apple juice