If this decay has a half-life of 10.2 years, what mass of 60.8g carbon-14 will remain after 20.4 years

How to tell if a molecule is polar or nonpolar with electronegativity

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?