What is the chemical formula for iron (ii) oxide?

a. fe2o2

b. feo

c. fe2o3

d. feo2

Identify the acid-conjugate base pair in this balanced equation: H2SO4 + 2NaOH → 2H2O + Na2SO4

What is the kinetic energy in kJ of 1 mole of water molecules (mass=18) if the average velocity is 590 m/s (1300 mph)

Suppose the innermost orbit an electron can occupy has an energy level of - 19 eV. Based on the absorption spectrum shown below, what is the energy of energy level 4?

What are the correct formulas and coefficients for the products of the following double replacement reaction? KOH + H3PO4

The mass of half mole of electrons is about (mass of electron = 9.1 * 10^-28g)

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.

Under what condition is decompostion the fastest? Under what condition is it the slowest?