After 30 minutes, 30 grams of a sample of Radon-222 remains unchanged. If the original sample had a mass of 960 grams, what is the half-life of the Radon-222? A.
8 minutes

B.
6 minutes

C.
3 minutes

D.
15 minutes

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

How does concentration affect reaction rate

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.