Which statement accurately describes a light-year?(Select One) It is the shape of a galaxy. It is the distance that light travels in a year. It is a yearly measurement of light given off by stars. It is the amount of time it takes light to travel one million kilometers.

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space

Iam hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5