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forsale [732]
3 years ago
9

Which equation describes a reduction?

Chemistry
2 answers:
strojnjashka [21]3 years ago
8 0

Answer:

2Cl+2e -->2Cl^-

Explanation:

reduction is the gain of electrons and this is the only option which fits the definition.

Daniel [21]3 years ago
8 0

Answer:

2 Cl + 2 e⁻ → 2 Cl⁻

Explanation:

<em>Which equation describes a reduction?</em>

  • <em>Mg(s) → Mg²⁺(aq) + 2 e⁻.</em> NO. This is an oxidation because Mg loses electrons and its oxidation number increases from 0 to 2.
  • <em>2 Cl + 2 e⁻ → 2 Cl⁻.</em> YES. This is a reduction because Cl gains electrons and its oxidation number decreases from 0 to 1-.
  • <em>Na(s) → Na⁺(aq) + e⁻.</em> NO. This is an oxidation because Na loses electrons and its oxidation number increases from 0 to 1.
  • <em>Al(s) → Al³⁺(aq) + 3 e⁻.</em> NO. This is an oxidation because Al loses electrons and its oxidation number increases from 0 to 3.
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The unique properties of water enable life to exist on Earth. Which of these is a property of pure water?
Lera25 [3.4K]

Answer:

Capillarity , Adhesion and cohesion . The unique property of water enable life to exist . The most important property of water is movement of materials due to water , maintenance and growth and reproduction .

Explanation:

3 0
3 years ago
Can you please help solve and explain the steps for the calculation?
Nimfa-mama [501]

Answer:

The hydrogen ion concentration in a solution, [H+], in mol L-1, can be calculated if the pH of the solution is known.

pH is defined as the negative logarithm (to base 10) of the hydrogen ion concentration in mol L-1 pH = -log10[H+] ...

[H+] in mol L-1 can be calculated using the equation (formula): [H+] = 10-pH

8 0
2 years ago
What is the charge for H before electron share?
just olya [345]

An H atom is made up of a nucleus with a +1 charge, as well as a single electron. Therefore, the only positively charged ion possible has charge +1.

I hope this helps!

8 0
3 years ago
Calculate the no. of each atoms presents in 10 grams of calcium carbonate.
raketka [301]

Molar Mass of Calcium carbonate:-

\\ \sf\longmapsto CaCO_3

\\ \sf\longmapsto 40u+12u+3(16u)

\\ \sf\longmapsto 52u+48u

\\ \sf\longmapsto 100u

\\ \sf\longmapsto 100g/mol

  • Given Mass=10g

\boxed{\sf No\:of\;moles=\dfrac{Given\:Mass}{Molar\:Mass}}

\\ \sf\longmapsto No\:of\;moles=\dfrac{10}{100}

\\ \sf\longmapsto No\:of\:moles=0.1mol

Now

\boxed{\sf No\:of\:molecules=No\;of\:moles\times Avagadro\: No}

\\ \sf\longmapsto 0.1\times 6.023\times 10^{23}

\\ \sf\longmapsto 6.023\times 10^{22}molecules

8 0
3 years ago
Calculate the MASS if the density is 2.34 g/mL and the volume is 12.50 mL.
AlexFokin [52]

Answer:

<h2>mass = 29.25 g</h2>

Explanation:

The denisty of a substance can be found by using the formula

Density =  \frac{mass}{volume}

Making mass the subject we have

<h3>mass = Density × volume</h3>

From the question

Density = 2.34 g/mL

volume = 12.50 mL

Substitute the values into the above formula and solve for the mass

That's

mass = 2.34 × 12.50

We have the final answer as

<h3>mass = 29.25 g</h3>

Hope this helps you

3 0
3 years ago
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