density of acetone in gm/cm^3 is 0.791
=28.80cm^3*0.791 g/cm63
=22.78 g
Answer:

Explanation:
Given that,
The volume of a sample of gas measured at 27 °C is 10.0 dm.
We need to find the temperature when the volume is reduced to 9.0 dm at the same pressure.
According Charles law,

Where, T₂ is new temperature

So, the new temperature is
.
Answer:
C.
Explanation:
It's the only one that seems most reasonable i hope this helps
Answer: SnO2 + 2 H2 = Sn + 2 H2O
Explanation: I used a balance equation website. It's called WebQC if you want to check it out for future help.
Answer:
divide the # of molecules by avogadros number and get 3.48 x 10^-6
Explanation: