Answer:
i think its true but I’m not sure
Explanation:
I know that they can. Be mixed
Explanation: Process is diffusion. The gas molecules follow a zig-zag path through the tube as they collide with the air molecules in the tube. The purpose of the glass tube is to eliminate air currents and to see if the gas molecules will move on their own.
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One mole of CuSO4 contains one mole of Cu2+.
One mole of any substance contains Avogadro's number of ions.
Therefore, number of ions of Cu2+ can be calculated as follows:
number of ions = number of moles * Avogadro's number
number of ions = 1 * 6.02 * 10^23 = 6.02 * 10^23 ions
We can use the ideal gas law equation to find the number of moles;
PV = nRT
where P - pressure
V - volume - 56.2 x 10⁻³ m³
n - number of moles
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature
standard temperature is 273 K
and standard pressure - 101 325 Pa
we can rearrange the equation to find the number of moles
![n = \frac{PV}{RT}](https://tex.z-dn.net/?f=n%20%3D%20%20%5Cfrac%7BPV%7D%7BRT%7D%20)
substituting the values in the equation
![n = \frac{101325Pa*56.2 x 10⁻³ m³}{8.314 Jmol⁻¹K⁻¹*273K}](https://tex.z-dn.net/?f=n%20%3D%20%20%5Cfrac%7B101325Pa%2A56.2%20x%2010%E2%81%BB%C2%B3%20m%C2%B3%7D%7B8.314%20Jmol%E2%81%BB%C2%B9K%E2%81%BB%C2%B9%2A273K%7D%20)
n = 2.51 mol
molar mass of Ar - 40 g/mol
mass of Ar in the sample - 2.51 mol x 40 g/mol = 100.4 g
Answer:
2 M
Explanation:
mole weight of CaBr2 = 40 + 2 * 79.9 = 199.8 gm
20 gm is then 20/199.8 =.1 mole
.1 mole / .50 liter = 2 M