What constitutes only 16% of earth's volume but 32% of earth's mass

What mass of carbon dioxide is produced from the complete combustion of 8.00*10-3 g of methane? Express your answer with the appropriate units.

Describe at least two air pollutants that destroy the ozone layer. discuss the origination of these pollutants and a plan for reduction

Which characteristic of atoms is the basis for the order on the Periodic Table? A. reactivity B. atomic size C. atomic number D. mass number

What might happen to an organism if its habitat could not meet one of its needs?

What substance do Golgi bodies prepare for secretion?

A gas has a volume of 27.5 L at 302 K and 1.40 atm. How many moles are in the sample of gas? A. 0.0401 mol B. 0.645 mol C. 1.55 mol D. 2.14 mol

Why does the body of the bird covered with feathers?

One molecule of caffeine contains 8 atoms of carbon, 10 atoms of hydrogen, 2 atoms of oxygen, 4 atoms of nitrogen. write the formula for caffeine with the elements in the order they are given.

A piece of magnesium metal is heated in the presence of chlorine gas, and a reaction takes place. What compound will most likely be produced? A. Mg2C1 B. MgCl3 C. MgCl2 D. MgCI

What is the pressure of the gas in this mercury manometer if h = 81 mm and atmospheric pressure is 749 mmHg