1. Is the following reaction a redox reaction? If so, please use oxidation numbers to verify what is oxidized and what is reduced.

Zn(s) + 2 NO, (aq) + 4 H(aq) → Zn²+(aq) + 2 NO2(g) + 2 H2O(1)

Embryos of different species look very similar, which shows that the organisms share a ancestor.

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.

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's