The astronaut then measures the abundance of strontium on the new planet, obtaining the following results:
isotope abundance
(%) mass
(amu)
86sr 9.46 85.91
87sr
7.00 86.91
88sr 83.54 87.91
what is the atomic mass of strontium for this planet?

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

How many moles are contained in 5.6 l of h2 at stp

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm