If an element is located on the far right side of the periodic table one of its physical properties probably be poor conductor of electricity. The answer is letter B.
of carbon is present in 4.00 g of butane.
Further Explanation:
The number of atoms or molecules that can be present in one mole of any substance is determined by a number, known as Avogadro’s number. The numerical value of Avogadro’s number is . Such units can either be atoms or molecules.
The formula to calculate the moles of is as follows:
…… (1)
The given mass of butane is 4.00 g.
The molar mass of butane is
Incorporate these values in equation (1).
The number of molecules present in one mole of butane is . So the expression to calculate the number of molecules of butane is as follows:
…… (2)
The number of moles of butane is 0.0688 mol.
The value of Avogadro’s number is .
Incorporate these values in equation (2).
A molecule of butane consists of four carbon atoms in it. So the number of carbon atoms can be calculated as follows:
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Answer details:
Grade: Senior School
Chapter: Mole concept
Subject: Chemistry
Keywords: butane, C4H10, Avogadro’s number, C atoms, moles, one mole, chemical formula, carbon atoms, molar mass of C4H10, given mass of C4H10.
(1) A catalyst is added as an additional reactant
and is consumed but not regenerated.
(2) A catalyst limits the amount of reactants used.
(3) A catalyst changes the kinds of products produced.
(4) A catalyst provides an alternate reaction pathway
that requires less activation energy.
B.4
C.1
D.2
the answer is a
Answer:
Its a
Explanation:
I got that answer on my own not from the Question ;)
The third energy level in an atom, as described by quantum mechanics, contains three sublevels: the s, p, and d sublevels.
In the field of chemistry, the term energy level refers to the fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have. Specifically, when we refer to the third energy level, we're talking about an energy state with the principal quantum number n=3.
For any energy level defined by the principal quantum number n, there are n sublevels. Therefore, in a third energy level (n=3), we have three sublevels. These would be the s, p, and d sublevels.
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Answer:
Classify each of the following statements as an experiment, a hypothesis, a scientific law, an observation, or a theory.
(1) For example, Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide (N2O) or nitrogen monoxide (NO). Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product.
(2) In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure.
(3) In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules.
(4) By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions
The correct answers to the question are as follows
(1) An experiment
(2) A scientific law
(3) A hypothesis
(4) A theory
Explanation:
(1) An experiment
A scientific experiment involves the development of procedures to verify an hypothesis
(2) A scientific law
A scientific law is a description or general rule to explain an observed phenomenon using a mathematical or verbal statement without attempting to provide an explanation
(3) A hypothesis
An hypothesis is an explanation of an observed phenomenon which can then be tested through the performance of experiments
(4) A theory
A theory in science is an explanation of naturally occurring phenomenon backed up by the results of experiments and observation
The given statements have been classified as experiment (1), observation (2), scientific law statement (3), hypothesis (4), and theory (5) respectively in the context of Chemistry.
1. Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide or nitrogen monoxide: This is an experiment.
2. Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product: This is an observation.
3. In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure: This is a statement of a scientific law.
4. In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules: This is a hypothesis.
5. By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions: This is a theory.
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At a higher temperature, the volume of the gas is smaller.
At a lower temperature, there are more particles in the gas.
At a lower temperature, the particles in the gas move faster.
Answer:
A
Explanation:
Took the test Got it right
B) acetyl CoA + choline
C) methylcholine + acetate
D) choline only
E) acetate only
Once released, acetylcholine is degraded by extracellular enzymes into acetate + choline. Option A is the correct answer.
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.
You can learn more about acetylcholine at
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