Radio wave eliminate band (answer c) is smallest within electromagnetic spectrum.
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelength and photon energies. The electromagnetic spectrum range from radio waves to gamma rays.Radio waves has the shortest wavelength while gamma rays has highest.
Answer:
The lightest gas will have the greatest molecular speed as shown
Explanation:
According to the kinetic theory of gases, gas molecules are in constant motion and frequently collide with each other and the walls of the vessel. Gas molecules have negligible intermolecular forces of attraction between them hence they move at a very high speed.
However, the distribution of molecular velocities in a mixture of gases depends on the relative molecular masses of the gases in the mixture. Given helium, neon and krypton; the order of decreasing masses and increasing molecular velocities is ; krypton<neon<helium. Hence helium being the lightest gas will have the greatest molecular velocity.
The molecular velocities of each gas has been represented using the length of arrows with different colours in the image attached. The colour codes are;
Red- krypton
Blue- neon
Black-helium
It can be seen that helium has the highest molecular velocity followed by neon and lastly, krypton.
<h3>
Answer:</h3>
179 L
<h3>
Explanation:</h3>
<u>We are given;</u>
The equation for the combustion of ethane.;
2C₂H₆(g)+7O₂g)→4CO₂(g)+6H₂O(l)
Volume of ethane gas used as 89.5 L
We are required to determine the volume of carbon dioxide produced;
<h3>Step 1: Determine the number of moles of ethane gas</h3>
According to the molar gas volume, 1 mole of a gas occupies a volume of 22.4 L at STP.
Therefore;
Number of moles of ethane = Volume given/molar gas volume
Thus;
Moles of ethane = 89.5 L ÷ 22.4 L
= 3.9955
= 4.0 moles
<h3>Step 2: Determine the number of moles of CO₂ produced </h3>
From the equation,
12 moles of ethane reacts to produce 4 moles of carbon dioxide
Thus; Moles of CO₂ = Moles of ethane × 2
= 4.0 moles × 2
= 8.0 moles
<h3>Step 3: Volume of CO₂ produced</h3>
We know that;
1 mole of a gas = 22.4 L at STP
Therefore;
Volume of CO₂ = 8.0 moles × 22.4 L/mol
= 179.2 L
= 179 L
Therefore, the volume of CO₂ is 179 L
Answer: Herrington found an ACID.
Explanation:
Acid is defined as a substance which when dissolved in water, produces hydroxonium ion as the only positive ion. It is a proton donor. Acid can be used for the production of fertilizers, dyes, detergents, drugs, plastic and explosives.
The characteristics of an acid includes:
--> They have sour taste
--> In pH scale, values below 7 indicates acidity increasing downwards from 6 to 1.
--> strong acids are corrosive.
--> substances called indicators give specific colours in acidic media. For example: blue litmus turns red; phenolphthalein turns colourless; and methyl orange turns pink.
--> they react with active metals, that is, those above hydrogen on the activity series, to liberate hydrogen gas.
--> they react with bases to produce salts and water as the only products. This reaction is known as neutralisation reaction.
The above characteristics about acid shows that the substance found by Herrington is an ACID.
