Chemistry, 25.09.2021 01:00, montoyaricardo3550
Scientists can use chemicals to clean toxins from the soil. What does this
show about chemicals?
A. Chemicals can be used to help the environment.
B. Scientists cannot predict the effect of chemicals on the
environment.
C. All chemicals are harmful to the environment.
D. Scientists have to fix the problems they cause by adding
chemicals to the environment.
Answers: 2
Chemistry, 23.06.2019 06:40, 1991987
1.) which of the following is a molecule but not a compound? a. he b. f2 c. h2o d. ch4 2.) what is a physical combination of substances? a. a compound b. a molecule c. a mixture d. an element 3.) what is a chemical combination of substances? a. a compound b. an atom c. a mixture d. an element 4.) what is the relationship between the solute and solvent in a solution? a. they form a compound b. they form a mixture c. they form molecules d. they form chemical bonds 5.) the gases in air dissolve in water. what would be one way to reduce the amount of a gas dissolved in water? a. add more water b. reduce the air pressure c. increase the air pressure d. stir the water 6.) how would you determine the solubility of a substance? a. find how well it dissolved various substances. b. find the mass and the volume of the substance. c. find the temperature at which the substance evaporated. d. find how much i was able to dissolve in a solute. 7.) the periodic table organizes all of the kinds of a. molecules. b. compounds. c. atoms. d. ions. 8.)what distinguishes two substances combined to become a compound vs. two substances combined to become a mixture? a. whether they can be easily separated b. whether they chemically bond together c. whether they both are visible d. whether they are heterogeneous 9.) the principle components of air are: n2 78% o2 21% ar 0.95% co2 0.038% this is a solution of a. molecules and atoms. b. molecules. c. compounds and molecules. d. atoms.
Answers: 1
Scientists can use chemicals to clean toxins from the soil. What does this
show about chemicals?
Mathematics, 27.01.2021 18:10
History, 27.01.2021 18:10
Mathematics, 27.01.2021 18:10
Mathematics, 27.01.2021 18:10
History, 27.01.2021 18:10