Why do scientists use stirbars in the laboratory?

a. to cool a solution

b. to heat a solution

c. to decrease the surface area of a solute

d. to agitate a solution

What is the mass of 1.70 moles of magnesium chloride, MgCl2?

In a first-order reaction (A → B and rate = k [A]), tripling the concentration of A will have what effect on the reaction rate? a It will stay the same. b It will increase by a factor of three. c It will decrease by a factor of three.

g Determine the empirical formula for a compound that contains C, H and O. It contains 40.92% C, 4.58% H, and 54.50% O by mass. Must show your work on scratch paper to receive credit.

the temperature changed - 2 per hour for 5 hours. How many degrees did the temperature drop during that time period.

What is the relationship between urbanization and population increase

Why reducing power of elements increase, on moving down a group?

Which of the following is not a result of air pollution? A. Smog B. Breathing problems C. Global warming D. Soil erosion

rank the following list of aqueous solutions and solvents according to decreasing vapor pressure the substance with the higher vapor pressure should be placed at top 0.10 M glucose pure water 0.050 M urea 0.20 M sucrose

What does the p mean in 1s22s22p63s1?

Why are alkaline earth metals and alkali metals found in nature by themselves?