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Viktor [21]
3 years ago
8

Will Give Brainliest!

Chemistry
2 answers:
Amanda [17]3 years ago
7 0

mass is very wrong i soully believe its magnetism

Lorico [155]3 years ago
5 0

Answer: The correct answer is Magnetism.

Explanation: We are given two samples of iron fillings.

Magnetism: This property remains same for any sample of same element.

Mass: We are given different mass. So, they cannot be same.

Shape: Iron fillings cannot have a definite shape.

Volume: As the density of any element remains same always. As the mass is different, so to have the same density, the volume of two sample will also be different.

Hence, magnetism is the only property that will remain same for the two samples.

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<h2>Complete the table to summarize the properties of the different subatomic particles. </h2>

Explanation:

Atom

It is a smallest particle which cant exist independently.

According To Dalton, atom was indivisible but later on, it was proved that atom can be subdivided into sub atomic particles called electron, proton & neutron.

These subatomic particles have marked properties .

Proton

  • It was discovered by E.Goldstein .
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Select any of the following combinations which would make a good buffer solution?
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Answer:

b. 0.05 M H₂CO₃ + 0.05 M KHCO₃

d. 0.1M HCN + 0.2M NaCN

g. 0.2M NH₃ + 0.1M NH₄Br

Explanation:

A buffer solution consists of the following components:

  • A weak acid and its conjugate base.
  • A weak base and its conjugate acid.

<em>Which would make a good buffer solution?</em>

<em>a. 0.3 M HC₂H₃0₂ + 0.1 M HCI</em>

It does not have the components of a buffer solution. HCl is a strong acid.

<em>b. 0.05 M H₂CO₃ + 0.05 M KHCO₃</em>

It is a good buffer because it has a weak acid (H₂CO₃) and its conjugate base (HCO₃⁻), which comes from the salt.

<em>c. 0.05 M KC₂H₃O₂</em>

It does not have the components of a buffer solution.

<em>d. 0.1M HCN + 0.2M NaCN</em>

It is a good buffer because it has a weak acid (HCN) and its conjugate base (CN⁻), which comes from the salt.

<em>e. 0.2M NaF + 0.2M NaOH</em>

It does not have the components of a buffer solution. NaOH is a strong base.

<em>f. 0.3M NH₄Cl</em>

It does not have the components of a buffer solution.

<em>g. 0.2M NH₃ + 0.1M NH₄Br</em>

It is a good buffer because it has a weak base (NH₃) and its conjugate acid (NH₄⁺), which comes from the salt.

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