Which gases each make up less than 1 percent of Earth's atmosphere? Select three options.

argon

oxygen

nitrogen

water vapor

carbon dioxide

If 83.0 ml of 0.150 m hcl (aq) is needed to neutralize all the nh3 (g) from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.

Graphite is a goid conductor of electricity and diamond is not

Which one of these is an element carbon carbon dioxide air water

If an element has more than one ionic charge, how is that piece of information represented in a chemical name?

What is an isotope? Give an example

A fossilized bone contains about 65% of its original carbon-14. to the nearest hundred years, how old is the bone

Calculate the mass of 1.25 moles of Al2 (SO4) 3

which of Nature's erosions message do you think wears down a mountain or part 2 faster when water or ice why

We dissolve 5.00 grams of sugar, C12H22O11, in water to make 1.000 L of solution. What is the concentration of this solution expressed as a molarity?

What mass of carbon monoxide must be burned to produce 175 kj of heat under standard state conditions?