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4 years ago

Which of the following is a compound? Ne N2 NaCl O2

Chemistry

2 answers:

Lapatulllka [165]4 years ago

7 0

Ne because it it just a regular element (neon)

Katyanochek1 [597]4 years ago

7 0

Answer:

NaCl, $N_2, O_2$

Explanation:

In chemistry, a chemical compound is a substance composed of the combination of two or more elements of the periodic table.

Ne: is an element of the periodic table.

$N_2$ : is a molecule

NaCl: is a molecule

$O_2$ : is a molecule

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You have a vial that may contain lead(II) cations or barium cations, but not both. Available to you are solutions of ammonium su

Bess [88]

Answer:

We should add, the KBr solution.

Explanation:

The vial contains Ba²⁺ and Pb²⁺

Our solutions are: (NH₄)₂ SO₄, NaF and KBr

We dissociate the solutions:

(NH₄)₂ SO₄ → 2NH₄⁺ + SO₄⁻²

NaF → Na⁺ + F⁻

KBr → K⁺ + Br-

When we add ammonium sulfate and sodium fluorine, we are adding sulfates and fluorines, but these two anions make precipitate both cations, we can not determine, if the vial contains Ba²⁺ or Pb²⁺

SO₄⁻²(aq) + Ba²⁺ (aq) → BaSO₄ (s) ↓

SO₄⁻² (aq)+ Pb²⁺(aq) → PbSO₄ (s) ↓

2F⁻ (aq) + Ba²⁺ (aq) → BaF₂ (s) ↓

2F⁻ (aq) + Pb²⁺ (aq) → PbF₂ (s) ↓

When we add the KBr, bromides only make precipitate with Pb²⁺, so the vial has only Pb²⁺ cation:

2Br⁻ (aq) + Ba²⁺ (aq) → BaBr₂ (aq)

2Br⁻ (aq) + Pb²⁺ (aq) → PbBr₂ (s) ↓

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3 years ago

CHEMCIAL TECHNOLOGY QUICK CHECK which activity would be considered resource extraction? eating beef raising cattle eating deer h

Harlamova29_29 [7]

Hunting deer can be considered resource extraction. It involves the loss of biodiversity.

<h3>What does resource extraction mean?</h3>

Resource extraction refers to the usage of fundamental resources (biodiversity resources) from the environment.

Hunting deer is considered a resource extraction activity because this activity involves the loss of biodiversity.

Biodiversity is a fundamental issue for the health (homeostasis state) of the whole ecosystem.

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2 years ago

Balance the following equation.<br> C3H8(g) + O2(g) → CO2(g) + H2O(l)

Arte-miy333 [17]

Explanation:

C3H8+5O2----->3CO2+4H2O

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3 years ago

Which action is necessary for a solar eclipse to occur?

Nat2105 [25]

Answer:

Moon has to be in-between the Earth and the Sun.

2. Moon's umbra should sweep your place.

3. Latitude and longitude of your place should be within the befitting limits.

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3 years ago

If the lab technician needs 30 liters of a 25% acid solution, how many liters of the 10% and the 30% acid solutions should she m

Mice21 [21]

Answer:

7.5 L of the 10% and 22.5 L of the 30% acid solution, she should mix.

Explanation:

Let the volume of 10% acid solution used to make the mixture = x L

So, the volume of 30% acid solution used to make the mixture = y L

Total volume of the mixture = <u>x + y = 30 L .................. (1) </u>

For 10% acid solution:

C₁ = 10% , V₁ = x L

For 30% acid solution :

C₂ = 30% , V₂ = y L

For the resultant solution of sulfuric acid:

C₃ = 25% , V₃ = 30 L

Using

C₁V₁ + C₂V₂ = C₃V₃

10×x + 30×y = 25×30

So,

Solving 1 and 2 we get,

6 0

3 years ago