What percentage of the Earth can a satellite reach at any given time? 100% 60% 40% 25%

Determine the reaction and balance the following equations urgent due in the morning

In which reaction is precipitation occurring?

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.