Answer:
1) correct
2) incorrect
3) correct
4)incorrect
Explanation:
1) A Lewis acid is a substance that accepts a nonbonding pair of electrons.
A Bronsted-Lowry acid is a substance that donates a proton H⁺
Since the donation of a proton involves the acceptance of a pair of electrons, every Bronsted-Lowry acid is also a Lewis acid.
2)A Lewis acid not necessarily needs to have a proton to be donated.
3) Conjugated acids of weak bases are strong acids and conjugated acids of strong bases are weak acids.
4)K⁺ comes from a strong base, therefore is does not have an acidic behaviour.
Answer:
The answer is "10.84 g".
Explanation:
The formula for calculating the number for moles:
In the given acid nitric:
Owing to the nitric acid mass = 
Nitric acid molar weight
If they put values above the formula, they receive:
In the given chemical equation:
In this reaction, 2 mols of nitric acid are produced by 1 mole of water.
So, 1.204 moles of nitric acid will be produced:
We are now using Equation 1 in determining the quantity of water:
Water moles 
Water weight molar 
The half-life of cesium-137 is 30 years. Suppose we have a 150 mg sample. The masses (in mg) that remains after t years A=150/2^t/30yrs
<h3>what do you mean by half-life?</h3>
A substance's half-life is the amount of time it takes for half of it to decompose.
<h3>What is a half-life example?</h3>
Half-life is the length of time it takes for half of an unstable nucleus to go through its decay process. A radioactive element's half-life decay time varies depending on the element. For instance, carbon-10 has a half-life of only 19 seconds, making it impossible to discover in nature. On the other hand, uranium-233 has a half-life of almost 160000 years.
When n half-lives have passed, the formula for estimating the amount still left is:-
A=A°/2^n
where,
A=initial amount
A°=remaining amount
n=t/t_{1/2}
A=150/2^t/30yrs
Learn more about half-life here:-
brainly.com/question/28001741
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Substance's attraction to external magnetic field i.e., their magnetic property/behavior distinguishes paramagnetic substance from diamagnetic substance.
<h3>What is paramagnetic and diamagnetic substances?</h3>
A diamagnetic substance is one whose atoms have no permanent magnetic dipole moment. They are slightly repelled by a magnetic field and do not retain the magnetic properties when the external field is removed
The examples of diamagnetic materials are copper, gold, antimony, silver, lead and hydrogen.
Paramagnetic materials are those materials that are weakly attracted by the external magnetic field. They are slightly attracted by a magnetic field and do not retain the magnetic properties when the external field is removed.
Examples of paramagnetic materials are aluminium, sodium and calcium.
To learn more about magnetism, refer brainly.com/question/18088490
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Answer:
D
Explanation:
BEcause you are testing which objects will stick. Your control variable will be the sweater. And the number of times you rub the object on the sweter will not make it stick. It will make it stick for a longer period.
