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CH 202 7R February 23, 2023 zoom duration 59 minutes 30 seconds CH 202 7R February 23, 2023 zoom CH 202 7R February 23, 2023 zoom	CH 202 7R February 23, 2023 zoom Zoom Recording ID: 94250081562 UUID: vx2CFSQrTumT53I7aN9dgQ== Meeting Time: 2023-02-23 05:24:18pmGMT electrons cell reaction charge half oxygen zinc volts potential problem moment table side iron metal flow acid step moles silver From Richard Nafshun 52 plays