A student lifts a box of books that weighs 350 N. The box is lifted 4.0 m. How much work does the student do on the box?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

What is the vapor pressure of a solution with a benzene to octane?

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity