Calculate the amount of work done against an atmospheric pressure of 1.00 atm when 500.0 g of zinc dissolves in excess acid at 30.0°C. Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g)

Possible answers:

A. w = +24.9kJ
B. w = -2.52kJ
C. w = 0
D. w = -19.3kJ
E. w = +22.4kJ

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Which element of a health-related website would suggest that the site may not be credible or reliable?

hyperlinks to other fitness, nutrition, or medical sites
tips for achieving instant positive results or an instant cure
details about a recent study on a medical issue or condition
safety warnings related to the information that is presented