Answer:
1-10 μL
Explanation:
Gas Chromatography (GC) is a method of separating the constituents of a complex mixture by taking advantage of their different rates of movement in a solvent over an adsorbent medium. Gas Chromatography (GC) is a means of separation and analysis that utilises fractional separation. It is based on the principle that if a fluid containing a number of substances is allowed to pass through an adsorbent medium , the different substances in the fluid may travel at different rates and be separated.
The approximate volume injected through an inlet by using a split injection into a Gas Chromatography (GC) contains a sample with an approximate value of analyte which varies from 1-10 μL.
In order to adjust for injection volume inaccuracy, the technique used is known as Internal Standard.
Answer:
0.89 moles of N2 gas
Explanation:
From Avogadro's law:
V1/n1 = V2/n2
n2 = V2n1/V1
V1=11.2L
V2= 20L
n1=0.5 moles
n2 = ??
Therefore
n2= 20×0.5/11.2= 0.89 moles
Answer:
Explanation:
Places near the Equator experience little seasonal variation. They have about the same amount of daylight and darkness throughout the year. These places remain warm year-round. Near the Equator, regions typically have alternating rainy and dry seasons.
Answer:
0.33 moles of aluminum are necessary to produce 11 L of hydrogen gas at STP.
Explanation:
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
You can apply the following rule of three: if by STP conditions, 22.4 L represents 1 mole of hydrogen, 11 L how many moles will they be?
amount of moles of hydrogen= 0.491 moles
On the other side, the balanced reaction is:
2 AI + 6 HCI → 2 AICI₃ + 3 H₂
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
- AI: 2 moles
- HCI: 6 moles
- AICI₃: 2 moles
- H₂: 3 moles
Then you can apply the following rule of three: if 3 moles of hydrogen are produced by 2 moles of aluminum, 0.491 moles of hydrogen are produced by how many moles of aluminum?
amount of moles of aluminum= 0.33 moles
<u><em>0.33 moles of aluminum are necessary to produce 11 L of hydrogen gas at STP.</em></u>
Answer: melting
Explanation:
The process in which a solid changes to a liquid is called melting. The melting point is the temperature at which a solid changes to a liquid. For a given type of matter, the melting point is the same as the freezing point.
