Which of the following conversion units is WRONG concerning sodium chloride, NaCl? Question 14 options:

1)

6.02 x 1023 formula units / 1 mol

2)

1 mol/ 6.02 x 1023 formula units

3)

58.44 mol / 1 g

4)

1 mol/ 58.44 g

What type of reaction is zn + cucl2 → cu + zncl2?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.