Why is air pressure greatest at the Earth's surface?

because of the pressure of oxygen

because of the weight of ice crystals

because gravity pulls gas molecules toward the surface

because of pollution

Explanation: Neon is an element. Its formula contains only one chemical symbol (Ne). Carbon monoxide is a compound. Its formula contains two chemical symbols (C and O). Glucose is a compound. Its formula contains three chemical symbols (C, H, and O).

Which substance contains metallic bonds (1) Hg (2) H2O (3) NaCL (4) C6H12O6

Which statement describes a chemical reaction at equilibrium? (1) The products are completely consumed in the reaction. (2) The reactants are completely consumed in the reaction. (3) The concentrations of the products and reactants are equal.

Why rusting takes place more readily in coastal areas

you have a rock, a jug of water and a bucket. you place the rock in the bucket and then pour the water over it. what change of shape would you expect to find and why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?

Consider the reaction: 8H2S (g) + 4O2 (g) →8H2O (g) + S8 (g). Δ[H2S]/Δt = - 0.033M/s. Find Δ[O2]/Δt. Δ[H2O]/Δt. Δ[S8]/Δt. Find the rate of the reaction.

At room temperature and pressure what is the volume of one mole of oxygen?

Ibuprofen, a common pain remedy, has an empirical formula of C7H9O and a molar mass of approximately 218.078 grams per mole. What is the molecular formula of ibuprofen?