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3 years ago

What's the difference between a substance and a mixture

Chemistry

2 answers:

zhuklara [117]3 years ago

4 0

Answer:

a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.

Explanation:

Radhe Radhe❤

harina [27]3 years ago

3 0

Answer:

A pure substance consists of only one element or one compound. Whereas, a mixture consists of two or more different substances which aren't chemically joined together.

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Samaira needs to rent some tents for an outdoor family reunion in July. What is the best type of tent for Samaira to rent so tha

SVETLANKA909090 [29]

Answer:

The correct answer is rough, white tents

Explanation:

The options that have black tents are wrong because black materials absorbs heat, hence cannot protect the family from the heat from the sun during the reunion.

Also light/heat energy easily penetrate smooth surfaces as against rough surfaces. From this explanation, rough, white tents are better for the reunion as they will protect the family from the heat radiated from the sun.

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4 years ago

Read 2 more answers

If you have 8.5 moles of Al2(SO4)3 how many grams of the compound do you have?

Zepler [3.9K]

Answer:

$RFM \: of \: aluminium \: sulphate = (2 \times 27) + (32 + (16 \times 4)) \times 3 \\ = 294 \\ 1 \: mole \: weighs \: 294 \: g \\ 8.5 \: moles \: weigh \: (8.5 \times 294) \: g \\ = 2499 \: g$

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3 years ago

Preparation the buffer solution: initial pH of buffer solution: ____ Titration of a weak acid with a strong base: initial pH of

Nikolay [14]

Answer:

pH of buffer solution is 7.0

Initial pH of Weak acid is 3.27

Final pH of weak acid is 3.07

Amount of NaOH added is 1ml

Explanation:

Titration is a process in which acid and base are introduced together until a neutral solution is achieved whose pH value is near to buffer solution which is 7.0, the pH value for acid is below 7 while pH value for base is above 7.

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3 years ago

madam [21]

The answer is D. 30 percent

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4 years ago

(a) ions in a certain volume of .20M NaCl (aq) are represented in the box above on the left. in the box above on the right, draw

mamaluj [8]

Answer:

The first picture attached is the diagram that accompanies the question.

The second picture attached is the diagram with the answer.

Explanation:

In the box on the left there are 8 Cl⁻ ions and 8 Na⁺ ions.

The dissociaton equation for NaCl(aq) is:

NaCl (aq) → Na⁺ (aq) + Cl⁻(aq)

The dissociation equation for CaCl₂ (aq) is:

CaCl₂ (aq) → Ca²⁺ (aq) + 2Cl⁻(aq)

A 0.10MCaCl₂ (aq) solution will have half the number of CaCl₂ units as the number of NaCl units in a 0.20M NaCl (aq) solution.

Thus, while the 0.20M NaCl (aq) solution yields 8 ions of Na⁺ and 8 ions of Cl⁻, the 0.10MCaCl₂ (aq) solution will yield 4 ions of Ca²⁺ (half because the concentration if half) and 8 ions of Cl⁻ (first take half and then multiply by 2 because the dissociation reaction).

Thus, your drawing must show 4 dots representing Ca²⁺ ions and 8 dots representing Cl⁻ ions in the box on the right.

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3 years ago