How many moles are in 4.5 g of magnesium sulfate

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

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.