Recycling aluminum cans and taking shorter showers are two ways to practice the blank of natural resources

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

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?

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