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sesenic [268]
3 years ago
7

The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to conta

in 1 mol of each substance?
A) No, because they have different masses.
B) No, because they have different volumes.
C) Yes, because the number of moles is not dependent on the mass or the volume.
D) Yes, because the number of moles is only dependent on the mass per unit volume.
Chemistry
2 answers:
sesenic [268]3 years ago
8 0

Answer: The correct answer is Option C.

Explanation:

To calculate the number of moles, we use the formula:

\text{number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

We are given in the question that the masses of twp samples are different and from the above formula, we see that the moles of a substance depends on the molar masses of the substance.

Volume of the substance has no effect on the moles.

So, the two substances can have 1 mol of substance.

andrew11 [14]3 years ago
5 0
<span>The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?

</span><span>C) Yes, because the number of moles is not dependent on the mass or the volume.</span>
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ahrayia [7]

Answer:

Actual velocity of the ping-pong ball= 5 m/s

Explanation:

velocity of ping pong ball because of the shot gun= 4 m/s North

velocity added to the ping-pong ball due to the wind=3 m/s

These velocities are perpendicular to each other. so we use Pythagoras theorem to find the resultant velocity of the ping- pong ball

so the actual velocity of the ping-pong ball =V= √4²+3²

V= √25

V= 5 m/s

Explanation:

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3 years ago
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Plants, Animals, Protists and Fungi all belong to which domain?
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Answer:

Eukarya

Explanation:

Organisms in the domain Eukarya keep their genetic material in a nucleus and include the plants, animals, fungi, and protists.

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3 years ago
how many moles of aluminum are needed to produce 0.418 mol of Al2(SO4)3? 2 Al(s) + 3 H2SO4(aq) → Al2(SO4)3(aq) + 3 H2(g)
nlexa [21]
<h3>Answer:</h3>

0.836 mol Al

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Chemistry</u>

<u>Stoichiometry</u>

  • Using Dimensional Analysis
  • Reactions RxN
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN - Balanced] 2Al (s) + 3H₂SO₄ (aq) → Al₂(SO₄)₃ (aq) + 3H₂ (g)

[Given] 0.418 mol Al₂(SO₄)₃

[Solve] <em>x</em> mol Al

<u>Step 2: Identify Conversions</u>

[RxN] 2 mol Al (s) → 1 mol Al₂(SO₄)₃ (aq)

<u>Step 3: Stoich</u>

  1. [DA] Set up:                                                                                                      \displaystyle 0.418 \ mol \ Al_2(SO_4)_3(\frac{2 \ mol \ Al}{1 \ mol \ Al_2(SO_4)_3})
  2. [DA] Multiply/Divide [Cancel out units]:                                                            \displaystyle 0.836 \ mol \ Al

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

Since our final answer already has 3 sig figs, there is no need to round.

5 0
3 years ago
What is the energy released when a chemical compound reacts to produce new compounds?
Ghella [55]
The energy released when a chemical compound reacts to produce new compounds is called Bonding Energy.
8 0
3 years ago
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2NaHCO, + Caci, -&gt; Ca(OH), + 2NaCl +
Leto [7]

Answer:

This is a precipitation reaction: Ca(OH)2 is the formed precipitate.

Reactants:

CaCl2 – Calcium chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02

Other names: Calcium(II) chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Calcium dichloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, E509 source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02

Appearance: White powder, hygroscopic source: wikipedia, accessed: 2019-09-27; Odourless hygroscopic colourless or white crystals source: ICSC, accessed: 2019-09-04

NaOH

Names: Sodium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Caustic soda source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Lye source: wikidata, accessed: 2019-09-02

Appearance: White, waxy, opaque crystals source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed: 2019-09-02

Products:

NaCl – Sodium chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02

Other names: {{unbulleted list source: wikipedia, accessed: 2019-09-27, Salt source: wikidata, accessed: 2019-09-02, Table salt source: wikidata, accessed: 2019-09-02

Appearance: Colorless cubic crystals source: wikipedia, accessed: 2019-09-27

Ca(OH)2 – Calcium hydroxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02

Other names: {{ubl source: wikipedia, accessed: 2019-09-28, Slaked lime source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Calcium hydrate source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02

Appearance: White powder source: wikipedia, accessed: 2019-09-28; Colourless crystals or white powder source: ICSC, accessed: 2019-09-04; White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.] source: NIOSH NPG, accessed: 2019-09-02

Explanation:

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3 years ago
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