What is the correct formula for Heptarsenic Tetrabromide

a. Ar2Br5

b. Ar4Br7

c. Ar7Br4

d. Ar9Br4
(all numbers are subscripts)

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The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Enzymes affect the reactions in living cells by changing the