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3 years ago

Can electricity cause a chemical change?

Chemistry

1 answer:

KiRa [710]3 years ago

6 0

Yes it can cause chemical change

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Which statement best describes the amount of catalyst that remains at the end of a reaction?

Ivenika [448]

I believe the correct answer is C. The amount of catalyst is the same at the end as at the beginning of the reaction. Catalysts can't be consumed by the reaction thus is not D.

7 0

3 years ago

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Metals react with oxygen to give oxides with the general formula MxOy. What is a balanced chemical equation for the reaction of

katovenus [111]

Answer: $4Fe+3O_2\rightarrow 2Fe_2O_3$

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here iron is having an oxidation state of +3 called as $Fe^{3+}$ cation and oxide $O^{2-}$ is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $Fe_2O_3$ .

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

$2Fe+3O_2\rightarrow 2Fe_2O_3$

8 0

3 years ago

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What is the Law of Definite Composition and how does it apply to pure substances and mixtures?

Lyrx [107]

Answer:

The Law of Definite Proportions ensures that chemical compounds are always created using the same proportions, regardless of the amount of the compound which is being made

5 0

3 years ago

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A GFCI is an example of what kind of electrical safety device?

vichka [17]

Answer:

Circuit breaker.

Explanation:

3 0

3 years ago

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Smooth muscle myosin is a motor protein that plays a crucial role in the contraction of smooth muscle. If this protein has a mol

zysi [14]

Answer: Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass, occupies 22.4 L at STP contains avogadro's number $(6.023\times 10^{23})$ of particles.

Molecular mass of protein = 480,000 g/mol

Thus 1 mole of protein weighs = 480,000 g

So 27 moles of protein weighs = $\frac{480,000}{1}\times 27=12960000g$

Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

6 0

4 years ago