H2 how many elements?

Which pair of compounds represents one Arrhenius acid and one Arrhenius base? A) CH3OH and NaOH B) CH3OH and HCl C) HNO3 and NaOH D) HNO3 and HCl

A single-displacement reaction is always a redox reaction, but a redox reaction isn't always a single-displacement reaction. True or False

What volume of 1.0 M sodium phosphate, to the nearest tenth of a liter, must be used to make 4.0 L of 0.80 M sodium phosphate?

If the first energy level can hold 2 electrons, the second holds 8, and the third can hold 8, what if the atomic number is bigger than 18? Where do the other electrons go?

At a temperature of 15 degrees C, a quantity of oxygen has a volume of 250 ml. If it's temperature is raised to 45 degrees C, what will it's volume be?

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?