What are the answers pls help me I have to turn it today!!

What effect does a decrease in temperature have on the overall rate of a chemical reaction? a decrease in temperature decreases . the reaction rate will

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest