3 Question 8 20 pts How many g of water will be produced by the combustion of 267 g of oxygen with 105 g pf C7H14? Useful information: H 1.00794 C 12.011 O 15.9994 (units are g/mol)

Idon’t understand this page, can someone ?

Express the following number in scientific notation. 0.026890 =

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)