A chemistry student decomposes a 78.0 gram sample of potassium chlorate, using manganese dioxide as a catalyst. Her effort yields 24.247 grams of oxygen. What is her percent yield

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced

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

The temperature of a lead fishing weight rises from 26 °c to 38 °c as it absorbs 11.3 j of heat. what is the mass of the fishing weight in grams?