2 CH 14 (1) + 19 O2 (g) – 12 CO2 (g) + 14 H2O (9)
If 77.5 g of hexane (C6H14) react,

how many grams of O2 are needed for the reaction to becompleted?

What is the chemical formula of the following compound

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.