Which 2 elements make up more than 80% of the atoms found in the Earth's crust

Which two conditions must exist in population for natural selection to take place?

What are the characteristics of a substance in the liquid state? answers: A: made up of particles packed closely together, having both definite shape and definite volume B: made up of particles packed relatively close together, having an indefinite

Which of the following refers to a situation in which the use of harmful gas emissions is balanced by the replenishing of renewable energy sources? carbon neutral carbon stability carbon footprint carbon alignment

What volume of 6.58M HCI is needed to make 500. mL of 3.00M HCI?

Oxygen is denoted as 16O *. How many protons and neutrons does an oxygen atom have?

Is nitrogen flammable? If so i want to build a patao gun using it as my fuel

What's the chemical formula for iron (ii) nitride

Ammonia (NH3) is one of the most common chemicals produced in the united states. it is used to make fertilizer and other products. Ammonia is produced by the following chemical reaction. N2 (g) + 3h2 (g) = 2nh3 (g) If you have 1.00 x 10^3g of N2 a.

How many grams of O2 are in 5.0 moles of the oxygen gas?

How many of the following compounds are soluble in water? Cu (OH) 2