How many mL of water would I need to add to 500mL of a 11.0 M solution to make its concentration 7.0? Group of answer choices

200 mL

300 mL

400 mL

500 mL

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)

Can someone me with questions 15 to 17 plz.

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.