What kind of bond is shown here? +
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Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

How many grams of mgbr2 are needed to produce 75g or metal?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?