A chemist prepares a solution of zinc oxalate (ZnC,0,) by weighing out 3.87 mg of zinc oxalate into a 400. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in giL of the chemist's zinc oxalate solution. Round your answer to 3 significant digits.​

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

Which three statements represent the benefits of performing experiments using computer simulations?