2. What percentage of the mass of 1 mole of C 2 H 5 O is derived from carbon ?

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol

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