Hydrogen peroxide decomposes according to the equation: 2H2O2→ 2H2O + O2. How many L O2 can be made from 1055mL H2O2 if the density of H2O2 is 1.407 g/mL and the density of O2 is 1.428 g/L? a
2276 L
b
503.6 L
c
950.7 L
d
488.9 L

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm