Which of the equations below represents the correct balanced equation?
a. mg (s) + hcl (aq) --> mgcl2 (aq) + h2 (g)

b. mg (s) + 2hcl (aq) --> mgcl2 (aq) + h2 (g)

c. 2mg (s) + hcl (aq) --> mgcl2 (aq) + h2 (g)

d. 2mg (s) + 2hcl (aq) --> mgcl2 (aq) + h2 (g)

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

How have the greenhouse gasses increased from the year 2000 to 2018

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2: