In ionic bonding, atoms SHARE ELECTRONS
Five base SI units that are commonly used in Chemistry; are
1.Metre (m)
2. Kilogram(kg)
3. seconds(s)
4.Kelvins (k)
5. Moles (mol)
<u>Answer:</u> The number of moles of gas present are 0.390 moles
<u>Explanation:</u>
To calculate the number of moles of gas, we use the equation given by ideal gas which follows:
![PV=nRT](https://tex.z-dn.net/?f=PV%3DnRT)
where,
P = pressure of the gas = 0.868 atm
V = Volume of the gas = 11 L
T = Temperature of the gas = ![25^oC=[25+273]K=298K](https://tex.z-dn.net/?f=25%5EoC%3D%5B25%2B273%5DK%3D298K)
R = Gas constant = ![0.0821\text{ L. atm }mol^{-1}K^{-1}](https://tex.z-dn.net/?f=0.0821%5Ctext%7B%20L.%20atm%20%7Dmol%5E%7B-1%7DK%5E%7B-1%7D)
n = number of moles of gas = ?
Putting values in above equation, we get:
![0.868atm\times 11L=n\times 0.0821\text{ L. atm }mol^{-1}K^{-1}\times 298K\\\\n=\frac{0.868\times 11}{0.0821\times 298}=0.390mol](https://tex.z-dn.net/?f=0.868atm%5Ctimes%2011L%3Dn%5Ctimes%200.0821%5Ctext%7B%20L.%20atm%20%7Dmol%5E%7B-1%7DK%5E%7B-1%7D%5Ctimes%20298K%5C%5C%5C%5Cn%3D%5Cfrac%7B0.868%5Ctimes%2011%7D%7B0.0821%5Ctimes%20298%7D%3D0.390mol)
Hence, the number of moles of gas present are 0.390 moles
Answer: Substance A will travel further at the end of the experiment and also it will have larger Rf value compared to substance B.
Explanation:
The affinity of substance towards the stationary or mobile phase means how much the substance binds to a phase. Because component B has greater affinity for the stationary phase, it binds more to stationary phase; while component A binds more to a mobile phase. Due to differences in their affinity, component A and B can be separated using chromatography. Stationary phase, as its name says, stays fixed, while the mobile phase is moving. Together with the mobile phase travels component A because of its greater affinity, while component B stays fixed due to its greater affinity for the stationary phase. In conclusion , substance A will travel further at the end of the experiment.
Rf value (Retention Factor) can be defined as the ratio of the distance traveled by a substance in the mobile phase (solute) compared with the distance traveled by the front of the mobile phase itself (solvent front).
Rf = Migration distance of substance / Migration distance of solvent front
Because the solvent front is always larger from the distance traveled by the solute, Rf values are always between 0 and 1. The farther a compound traveled, the larger its Rf value will be. In this example, substance A will have larger Rf value compared to substance B.
Assuming the complete question is;
Consider the balanced equation below;
4NH3 + 3O2 = 2N2 +6H2O
What is the mole ratio of NH3 to N2;
From the balanced equation; the mole ratio of NH3 to N2 is 4:2.
The mole ratio is the ratio of moles of one substance to the number of moles of another substance in a balanced equation. In the above equation; 4 moles of ammonia requires 3 moles of oxygen to produce two moles of nitrogen and six moles of water.