How many moles of copper are needed to react with sulfur to produce 2.9 moles of copper (I) sulfide

What is important to study for nios grade 12 chemistry? i have only one month left.

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.