Which of the following is true of a heterogeneous mixture?a. Different samples may not be exactly alike.
b. The density is the same throughout the entire mixture.
c. It is not possible to separate the various parts of the mixture.
d. Taking one sample will enable you to determine what it is made of.

Answer:

• The third chice: 0.0750 M Na₂SO₄

Explanation:

Assume 100% ionization:

1) 0.100 M solution K₂SO₄

• K₂SO4 (aq) → 2K⁺ (aq) + SO₄²⁻ (aq)

• Mole ratios: 1 mol K₂SO4 : 2 mol K⁺  + 1 mol SO₄²⁻ (aq) : 3 mol ions. This is 1 : 3

• At constant volume, the mole ratios are equal to the concentration ratios (M).

• 1  M K₂SO₄: 3 M ions = 0.100 M K₂SO₄ / x ⇒ x = 0.300 M ions

This means, that you have to find which of the choices is a solution that contains the same 0.300 M ion concentration.

2) 0.0800 M Na₂CO₃

• Na₂CO₃ (aq) → 2 Na⁺ + CO₃⁻

• 1 M Na₂CO₃ / 3 M ions = 0.0800M / x ⇒ x = 0.0267 M ions

This is not equal to 0.300 M, so this solution would not contain the same total concentration as a 0.100 M solution of K₂SO₄, and is not the right answer.

3)  0.100 M NaCl

• NaCl → Na⁺ + Cl⁻

• 1 M NaCl / 2 M ions = 0.100 M NaCl / x ⇒ x = 0.200 M ions

This is not equal to 0.300 M ion, so not a correct option.

4) 0.0750 M Na₃PO₄

• Na₃PO₄ → 3Na⁺ + PO₄³⁻

• 1 M Na₃PO₄ / 4 M ions = 0.0750 M Na₃PO₄ / x ⇒ x = 0.300 M ions

Hence, this ion concentration is equal to the ion concentration of a 0.100 M solution of K₂SO₄, and is the correct choice.

5)  0.0500 M NaOH

• NaOH → Na⁺ + OH⁻

• 1 M NaOH / 2 mol ions = 0.0500 M NaOH / x ⇒ x = 0.100 M ions

Not equal to 0.300 M, so wrong choice.

The correct answer its True

hope it helps

can i get brainlyest please??

Final answer:

An ion differs from an atom in that it has a net electrical charge, either positive or negative, due to the loss or gain of electrons.

Explanation:

An ion differs from an atom in that it has a net electrical charge. This charge is either positive or negative, resulting from the loss or gain of electrons by the atom. When an atom loses electrons, it becomes positively charged and forms a cation. On the other hand, when an atom gains electrons, it becomes negatively charged and forms an anion.

For example, let's consider sodium (Na) and chloride (Cl) atoms. Sodium has 11 protons and 11 electrons, making it neutral. However, when it loses an electron, it becomes a sodium ion (Na+), which now has 11 protons and 10 electrons, giving it a +1 charge. Chloride, on the other hand, has 17 protons and 17 electrons, making it neutral. But when it gains an electron, it becomes a chloride ion (Cl-), which now has 17 protons and 18 electrons, giving it a -1 charge.

So, while an atom is electrically neutral, an ion has a charge due to the loss or gain of electrons.

Learn more about Difference between an ion and an atom here:

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Answer:

salt

Explanation:

because is logic sense lol

The given Lewis structure does not show valid resonance form. So,the given statement is false.

What is Lewis structure?

The Lewis structure is the representation of the of valence shell in the molecule.

What is valence electron?

The electron present in outermost shell and which involve in chemical bond formation is called valence electron.

What is resonance structure?

Resonance is way to explain the localisation of electron in molecule where Lewis formula fails to describe.

The given statement is false because both structure shows different number of valence electron.

To learn more about Lewis structure here.

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Answer:

true

Explanation:

because Lewis represent valid resonance