Answer is: 0,327 g/l.
<span>Ideal gas law: pV = nRT.
</span><span>V - volume, the amount of space occupied by the gas.
</span><span>p - pressure ,1 atm = 760 torr = 760 mmHg.
</span><span>n - amount of substance.
</span>T - temperature, 273 K = 0°<span>C. T = 25 + 273 = 298K.
</span>R - ideal gas constant,<span> R = 0,08206 L</span>·atm/mol·K<span>.
</span>d(He) = M·p ÷ R·T.
d - density.
M - molar mass.
d(He) = 4g/mol · 2atm ÷ 298K · 0,08206 L·atm/mol·K = 0,327 g/l.
I think it’s A it’s showing the par-ten to those certain things how it works
Stardust atoms are heavier elements, the percentage of star mass in our body is much more impressive. Most hydrogen in our body floats around in the form of water .
Answer:
This is confusing
but if you still need help, you can search it online
Explanation:
Answer:
Explanation:
Interesting way to teach molarity. Count the number of Black dots in Vessel 1. There are 4. There are also 4 clear dots. The number Ks = Cls
The molarity is 4 units of KCl/volume of vessel 1.
Now look at vessel 2. All you need do is count the black dots. There are fewer of them
There are 8 by my count. The volume hasn't changed but the black dots have doubled. That means there are 8 units of CaCl2 / volume of Vessel 2 (which is the same volume as Vessel one.)
The answer cannot be anything but D.
Before you count the clear dots in vessel two, make a guess of how many there should be. Notice the formula for CaCl2 has a two in it. Make your best guess and count away.