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3 years ago

The tyndall effect is used to distinguish between

1 answer:

6 0

The Tyndall Effect is the effect of light scattering in colloidal dispersion, while showing no light in a true solution. This effect is used to determine whether a mixture is a true solution or a colloid.

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Which of the following elements are already balanced in this equation? FeS₂ + Cl₂ → FeCl₃ + S₂ Cl₂

Anuta_ua [19.1K]

Fe and S are already balanced in this equation

<h3>Further explanation</h3>

Balanced indicates that the number of elements in question has the same number of atoms both on the left side (the number on the reactants side) and on the right side (the number on the product side)

Even though one of the elements is said to be balanced, the chemical equation as a whole cannot be said to be balanced, because the chemical equation has several components of the constituent elements.

To balance chemical equations, a coefficient in front of the compound is usually added either in the reactants or products

Reaction

FeS₂ + Cl₂ → FeCl₃ + S₂Cl₂

From this equation, it can be shown that: the Fe and S elements are balanced because the numbers are equal both on the left and right, while the Cl elements are not yet balanced

Fe, left=1, right=1 ⇒ balanced

S, left=2, right=1 ⇒ balanced

Cl, left=2, right=5⇒ not balanced

For balanced equations:

2FeS₂ + 5Cl₂ → 2FeCl₃ + 2S₂Cl₂

8 0

3 years ago

What is the molarity of a 0.250 L MgCl2 solution that contains 0.175 mol MgCl2?

spayn [35]

Explanation:

we know that 0.250 L = 0.250 dm3

molarity = concentration in dm3/ volume

molarity = 0.175/0.250 = 0.7 mol/dm3

4 0

3 years ago

Which of the following air pollutants causes a reddish-brown haze in the sky?

Evgen [1.6K]

I would say A. Sulfur dioxide. Local coal burning power plants have been known to change the color of the sky.

7 0

4 years ago

Read 2 more answers

A proposed mechanism for the oxidation of nitric oxide to nitrogen dioxide is shown below. 2 no (g) ⇄ n2o2 (g) fast, reversible

Sedbober [7]

Rate law is determined the rate of the slowest chemical reaction since it determine the rate of overall reaction . but this applies when the slowest step come before the fast step. For the equation above the fast step come before the slowest step. The rate law is therefore.
2NO to n2o2 (fast)
N2O2 +O2 -->2NO2(SLOW)
NO2+O2 ---> NO +O3(FAST)
rare law = k2(N2O2)(O2)

6 0

3 years ago

Read 2 more answers

Which of the following statements are true about metallic bonds?

Alborosie

Answer:

B. They bond identical atoms together

Explanation:

Metallic Bond: This is the bond that exists among the atoms of the metal. This is a type of electrostatic attraction between conduction electrons of metallic atom and their positively charged metal ions.

<em>(figure attached)</em>

Example:

Copper is a metallic element and its atoms consist of metallic bond among their selves.

Options A, B, D are not correct as all states for a kind of ionic bond formation.

Ionic bond:

It form by the complete transfer of electron from one atom to other

It is formed among two atoms of different electronegativities.

Also metals are electro-positive and non -metals are electro-negative so they form ionic bond.

Example is NaCl where sodium is a metal and Chloride is non-metal and they from ionic bond.

7 0

3 years ago