Sarah is testing how quickly saltwater freezes. she adds saltwater to one ice tray and plain water to another ice tray. she places each tray in the freezer and records the time when each one starts to freeze. what treament did she do? . a. salt. b. water. c. freezer. d. ice tray
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At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?
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At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver
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Sarah is testing how quickly saltwater freezes. she adds saltwater to one ice tray and plain water t...
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