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3 years ago

Help me on this question, will give brainliest.

Chemistry

1 answer:

JulsSmile [24]3 years ago

6 0

The answer is to this question is c

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What would a scientist’s next steps be if his/her data failed to support their hypothesis?

Paul [167]

To change only one variable which is very important than to test the experiment to match the hypothesis again, I think. It’s been a while since I was on that lesson‍♀️

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3 years ago

What involves 2 non metals ionic or covalent bonds

Juli2301 [7.4K]

Answer:

A bond forms between two non metals is covalent

Explanation:

For example Chlorine Cl is a non metal bond in Cl - Cl is covalent

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3 years ago

Which ionic equation describes a redox reaction? A. Ag(+) + Cl- = AgCl B. 2H(+) + CO3(2-) = CO2 + H2O C. H(+) + OH(-) = H2O D. Z

Gennadij [26K]

Answer: The correct option is D. $Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu$

Explanation:

Redox reaction is defined as the reaction in which oxidation and reduction take place simultaneously. It is known as the reaction in which the exchange of electrons takes place.

The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction. It occurs when the oxidation number of a species increases.

A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when the oxidation number of a species decreases.

From the given ionic reactions:

$Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu$

On the reactant side:

Oxidation number of Zn = 0

Oxidation number of Cu = +2

On the product side:

Oxidation number of Cu = 0

Oxidation number of Zn = +2

As the oxidation number of Zn is increasing from 0 to +2. Thus, it is getting oxidized. Similarly, the oxidation number of Cu is decreasing from +2 to 0. Thus, it is getting reduced. Therefore, forming a redox couple

Hence, the correct option is D. $Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu$

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3 years ago

Convert to moles 3.45 g Na

GenaCL600 [577]

Answer: .150 moles of Ana

Explanation:

You just multiply 3.45 g of Na times the number of mole so in this case 1 mole divided by the grams it takes to make that mole. Which can be found on your periodic table it is the number right under the symbol of the element.

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3 years ago

People expend energy even when they sit perfectly still. Why?

Murljashka [212]

Because you’re body is using energy to keep you alive. Your breathing takes energy, so does your heart beat.

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