What is the mass of oxygen in 25 g of KMnO4

it's all four options.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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i think its 100

i hope this !