If false rewrite the statements to make them correct True or False.

1 answer:

3 0

1. Only particles in the solid state are not in motion 2. The particles of a solid have less energy than gas 3. In a glass of iced tea the sugar in iced tea are the solvent and the water is the solute.

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I know that the answer is C. 8, but can you explain step by step how to get that answer?

Leya [2.2K]

Answer:

Explanation:

Oxidation:

$Fe^{2+} -->Fe^{3+}+e^{-}$

Reduction:

$Cr_{2}O_{7}^{2-}+6e^{-} -->2Cr^{3+}$

We have to equalise the number of moles of electrons gained and lost in a redox reaction in order to get a balanced reaction.

Hence we have to multiply the oxidation reaction throughout by 6.

and adding the two half-reactions we obtain:

$6Fe^{2+}+Cr_{2}O_{7}^{2-} -->6Fe^{3+}+2Cr^{3+}$

Still the total charge and number of oxygen is not balanced.

Since the reaction takes place in acidic conditions, we will add required number of H+ to the appropriate side to balance the charge and add half the amount of H2O to balance the hydrogen atoms.

We add 14 H+ on LHS and 7H2O on RHS to obtain:

$6Fe^{2+}+Cr_{2}O_{7}^{2-}+14H^{+} -->6Fe^{3+}+2Cr^{3+}+7H_{2}O$

Sum of coefficients of product cations = 6+2 = 8

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Which country contributes the most green house gases to earth'satmosphere?

pshichka [43]

United states of america

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Water is an example of a compound that is held together by what bonds

nikklg [1K]

Water is held together by hydrogen bonds.

Water molecule: H2O:
--- = hydrogen bond

O
/ \
H H ---O
/ \
H H

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When discussing discordant and harmonious sound waves, which statement is false?

notka56 [123]

When discussing discordant and harmonious sound waves, the statement tat is false is : if the original waves combine to form irregular displacement of air, the sound will be discordant. The fact is, irregular displacement of air does not guarantee sound discordance

hope this helps

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What kind of signals does nerve tissue use to convey information?

marshall27 [118]

Glial cells or glia

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