Maria wants to determine which type of disinfectant kills the most bacteria.

Which of the following is the best way for Maria to determine this

A plant converts sunlight into stored energy is a physical or chemical change

Which of the 3 variables that apply to equal amounts of gases are directly proportional?

Every night when the sun sets, the air temperature decreases. How does the relative humidity change (increase, decrease, or stay the same) when the air temperature decreases?

A scientific idea becomes valid when it is ... tested biased permanent complex

Calculate the energy of a photon of radiation with a frequency of 8.5*10^14

What do a Am radio, Fm radio, television and cell phones have in common. A.) they were all invented in the same year B.) they were all invented by the same scientist C.

Consider the reaction: 2 NO (g) + 5 H2 (g) → 2 NH3 (g) + 2 H2O (g) A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Which set of amounts best represents the mixture after the reactants have reacted as completely as possible?

True or False: If you have 2 moles of water and 2 moles of carbon, you have the same number of molecules.

Balancing chemistry equations

How much energy, in joules, is released when 17 kilograms of granite is cooled from 45 C to 21 C?