Why is a good insulator important for conserving energy in homes during the winter? The summer?

Which example shows electrical energy being transformed into heat energy? A) burning a wax candle B) a small toaster oven toasts a bagel C) rubbing two sticks together D) sunlight heating a metal door

What causes beads of moisture to form on the outside of a cold drinking glass? A. Water vapor in the air gains thermal energy from the cold glass surface. B. Water vapor in the air condenses into a liquid on the cold glass surface. C.

What is the order of energy sources for least net carbon dioxide emission? Peat Wood pellet fuel Agricultural Resdidue pellets and ethanol (grasses, corn stover, straw, rice husks) Biochar sequestration (produced by torrefaction or pyrolysis).

Tony was diagnosed with skin cancer. His children are worried that they might have skin cancer too. As Tony's doctor, you must break the news to his children. Which of the following would be accurate? a.

HC1 solution is mostly water. NaOH solution is mostly water. When 50mL of HC1 is mixed with 50mL of NaOH, what is the final mass?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.

Solve for x: ln x = 0.863. Report your answer to 3 significant figures.