Iron reacts with oxygen in the air to make rust. Which of the chemical equations matches the reaction above?
A.
4Fe + 3CO2 2Fe2C3O3
B.
4Fe + 3O2 2Fe2O3
C.
2I2 + 3O2 2I2O3
D.
2I2 + 3CO2 2C3I2O3

What happens when an acid dissolves?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.