The law of conservation of matter states that matter cannot be created or destroyed. this law applies when a chemical change occurs. the number of atoms present before a chemical change is the same as the number of atoms present after the change. the atoms may be combined in a new way, but the overall number of atoms remains unchanged. using the law of conservation of matter, if i started an experiment with 200 atoms of matter, how many atoms would i have after the chemical change? question 1 options: 100 200 300 400

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?

Which is true of a liquid? it has a definite volume but not a definite mass.it has a definite mass but not a definite volume.it has a definite volume but not a definite shape.it has a definite shape but not a definite volume.

Listenbase your answer to the question on the information below.nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body.cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment.which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61