Which of the following is an example of a chemical change? 25 points

A. water evaporating
B. carbon joining with oxygen to form carbon dioxide
C. ice cream melting
D. salt dissolving into water to form a solution

Which of the following statements is true? question 4 options: nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not. neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0