Calculate the number of phosphorus atoms in a 70.0g sample of diphosphorus pentoxide (P2O5). Be sure your answer has a unit symbol if necessary, and round it to 3 significant digits.

Given the following reaction: c3h8+5o2=3co2+4h20 how many grams of co2 will be produced 7 g of c3h8 and 98 g of o2

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?

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