How many grams of P are there in a sample of P that contains the same number of moles as a 42.2 gram sample of I?

particle   p is an electron and particle q is a neutron

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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