Answer:
the volume of a set of keys is 6.75ml
Volume of cube = a³
2.50 * 2.50 * 2.50 = 15.625 cm³
Density = 8.90 g/cm³
mass = ??
m = D * V
m = 8.90 * 15.625
m = 139.0625 g
hope this helps!
Answer: The final pressure is 0.81 kPa
Explanation:
The combined gas equation is,
where,
= initial pressure of gas = 0.58 kPa
= final pressure of gas = ?
= initial volume of gas = v
= final volume of gas =
= initial temperature of gas =
= final temperature of gas =
Now put all the given values in the above equation, we get:
The final pressure is 0.81 kPa
Ideal gasses (ideal gas law)
I hope this helps in some way. I forgot to mention that the question states they want to find THE NUMBER OF MOLES for H2O. Yherefore, you would want mol of H2O on top.