If two gases are present in a container, the total pressure in the container is equal toa.the sum of the pressures that are exerted by each of the two gases.
b.twice the sum of the pressures that are exerted by the individual gases.
c.the sum of the pressures that each gas would exert if they occupied twice the volume.
d.the sum of the pressures that each gas would exert if they occupied half the volume.
Answers
Answer: The correct option is (a).
Explanation:
If two gases are present in a container, the total pressure in the container is equal to the sum of the all the individual pressures exerted by the individual gases in a container.
Individual pressure exerted by the individual gas in a container is called partial pressure of that individual gas.
So, total pressure of gas in container is:
Where = Total pressure exerted by the gases in the container.
= Partial pressure of gas 'a'
= partial pressure of gas 'b'
The answer is a, because the question is referring to partial pressures. Partial pressures are a mere sum, no halving or doubling of anything is necessary.
So, A
Hope this helped :)
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How many moles of oxygen are produced when 8 moles of Al are produced?
125 cm3 of a solution contains 0.25 moles of the solute. What is the concentration of the solution?
Name two elements that have properties similar to copper
Which of the following affects the rate of a chemical reaction?A. the presence of a catalyst B. the temperature C. the concentration of reactants D. all of the above
Iron
Sugar
Sand
Answers
Because it does not have the same properties, composition or appearance throughout the mixture. (Sand.)
Hope this helped! c:
B) acetyl CoA + choline
C) methylcholine + acetate
D) choline only
E) acetate only
Answers
Final Answer:
Once released, acetylcholine is degraded by extracellular enzymes into acetate + choline. Option A is the correct answer.
Explanation:
Acetylcholine (ACh) is a neurotransmitter responsible for transmitting signals across synapses in the nervous system. Once it is released into the synaptic cleft, acetylcholine is rapidly broken down by the enzyme acetylcholinesterase (AChE). The enzymatic degradation of acetylcholine by AChE results in the hydrolysis of the acetyl group, leading to the formation of acetate and choline.
Acetate is a small molecule that is easily cleared from the synaptic cleft, while choline can be taken up by the presynaptic neuron to be reused for the synthesis of new acetylcholine molecules. This degradation process is essential for terminating the signal transmission and preventing continuous stimulation of the postsynapticneuron.
Option A is the correct answer.
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Answers
1. The environment. Every machinery and device the industries makes which includes, infrastructures, mega structures to micro devices. Iron and steel is used. Reducing the extraction of ore and creating steel saves the environment, reduces mining.
2. Economic reasons. When the ore mining and steel making is reduced in activity, the government won’t just be able to save the environment but it also save funds for other purposes.
Answers
The amount of hydrogen produced does not change if the volume of water was decreased to 440mL 400g.
What is Mole?
The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
The reaction will be;
Ca(s) + 2 H₂O(l) → Ca(OH)₂(aq) + H₂ (g)
Since water is in excess, because 0.1 moles of calcium requires only 0.2 moles of water which is 3.6 g, therefore changing the mass of water used will not affect the amount of hydrogen gas produced since the amount of hydrogen gas produced depends on the amount of calcium used.
Therefore, The amount of hydrogen produced does not change if the volume of water was decreased to 440mL 400g.
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Answer:
The volume of hydrogen produced would be the same.
Answers
Answer : The amount of heat needed are, 8464.5 J
Explanation :
Formula used :
where,
q = heat gained = ?
m = mass of water = 45.0 g
c = specific heat of water =
= final temperature =
= initial temperature =
Now put all the given values in the above formula, we get:
Thus, the amount of heat needed are, 8464.5 J
m is the mass of the water, Cp is the specific heat of water and ∆T is the change in temperature of the water (final-initial temperature). q is the energy involved in the reaction, measured in joules.
q=(45.0) x (4.184 Jg^-1/°C^-1) x (45°C)
q=8472.6 Joules
Answers
The covalent bonds present in based on the valence electrons and thus form 4 bonds.
What are valence electrons?
The valence electrons are the number of electrons present on the last orbital of the atom.
The atomic number of carbon is 6, thereby it is given with the electronic configuration 2, 4.
There is the presence of the 4 valence electrons in the carbon atom, and thereby the number of covalent bonds formed by carbon atom is 4.
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