how much heat is required to vaporize 343g of liquid ethanol at its boiling point?
In the laboratory small zircon crystals were separated from granite (K). Isotopic analysis of these zircon crystals gives a 207Pb/235U ratio of 0.45. the half-life of 235U (7.04 × 108 years), estimate the age of the granite in Ma to two significant figures
You are using concentrated hydrochloric acid solution (12.0 M)to make 445.0 ml of a 5.85 M solution. Calculate the number of milliliters of concentrated HCl required to make the solution.
Correct the right hand side of the following expressions. 5+ x = 5 + X 2 6 2 + 6 6x + 5 = x + 5 6 1 1 1 y + c = y + c
Jake ate seven times more jelly beans as Sam. Together they ate 128 jelly beans. How many jelly beans did each person eat?
An investment pays 9 percent interest compounded semi-annually. What is the effective annual interest rate?
f/-11 < 9
an elevator motor provides 45 W of power while lifting a 2000 kg elevator 35 m. if the elevator contains six passengers of the same mass and it takes 20.0 to accomplish this task, determine pass of each passenger.
Which of the following is characteristic of a capitalist economic system? a. free enterprise b.self-reliance c.private property d.individualism e.all of the answers are correct
In the snow is repeated three times in Scotts Goodbye. What meaning might the writer have hoped to convey by repeating this phrase?