Oxygen is 21% and nitrogen is 78% so combined is 99%
The red is an oxygen molecule. 1 oxygen and 2 hydrogen =h2o or water!
Answer:
I am pretty sure the correct answer is a reproductive system
Look up a picture of the elements on a periodic table. Start reading from the top.
Answer:
0.0300 moles of H₂
Explanation:
The original equation is PV = nRT. We need to change this to show moles (n).
n = 
It's important to convert your values to match the constant (r) in terms of units.
30.0 kPa = 0.296 atm
2500 mL = 2.50 L
27 °C = 300 K
Now, plug those values in to solve:
n =
- for the sake of keeping the problem clean, I didn't include the units but you should just to make sure everything cancels out :)
Finally, you are left with n = 0.0300 moles of H₂