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2 years ago

Circle the letter of each chemical equation that is balanced

Chemistry

2 answers:

Dahasolnce [82]2 years ago

7 0

Just choice D.
If you find the number of atoms of each element, you will find that only choice D has the same amounts on each side of the equation.

Alenkasestr [34]2 years ago

5 0

Explanation:

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What is the mass percent of potassium sulfate in solution if 78g of potassium sulfate is dissolved in 500 mL of water? (The dens

Debora [2.8K]

Answer:

13.5 %

Explanation:

First we<u> calculate the mass of 500 mL of water</u>, using <em>its density</em>:

Volume * Density = Mass

500 mL * 1.00 g/mL = 500 g

Then we <u>calculate the mass percent of potassium sulfate</u>, using the formula:

Mass of Potassium Sulfate / Total Mass * 100%

78 g / (78 + 500) g * 100 % = 13.5 %

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2 years ago

After taking a hot shower you may notice that the room gets steamy and the mirror is foggy you might also notice that there is m

ruslelena [56]

Answer:the temperature might increase because of the humidity in the room so everything gets goofy and moist

Explanation:

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2 years ago

Draw the structure of 4-methyl-5-oxohexanal.

aniked [119]

Answer:

Explanation:

The structural formula provides more information which is often used to represent a particular organic substance. A structural formula indicates how the atoms are arranged within the molecule of a substance. From the information, the structure of 4-methyl-5-oxohexanal is represented by using a stick formula where the methyl group falls into position 4 and oxygen group falls into position 5 on the hexanal compound.

The structure is provided in the image attached below for better understanding.

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3 years ago

When iron metal reacts with oxygen, the reaction can form Fe2O3. Write a balanced chemical equation for this reaction, and find

I am Lyosha [343]

<h3>Answer:</h3>

Balanced equation: 4Fe + 3O₂ → 2Fe₂O₃

Moles of oxygen gas = 9 moles

<h3>Explanation:</h3>

To answer the question;

We first write the balanced equation between iron metal and Oxygen

The balanced equation is given as;

4Fe + 3O₂ → 2Fe₂O₃

We are given 6 moles of Fe₂O₃

We are required to determine the number of moles of oxygen needed to form 6 moles of Fe₂O₃.

From the equation, 3 moles of oxygen gas reacts to produce 2 moles of Fe₂O₃

This means, the mole ratio of O₂ to Fe₂O₃ is 3 : 2

Therefore; Moles of O₂ = Moles of Fe₂O₃ × 3/2

Hence, moles of oxygen = 6 moles × 3/2

= 9 moles

Thus, Moles of Oxygen needed is 9 moles

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2 years ago

What is the chemical symbol of an element

11Alexandr11 [23.1K]

A chemical symbol is a shorthand method of representing an element. Instead of writing out the name of an element, we represent an element name with one or two letters. As you know, the periodic table is a chemist's easy reference guide. ... Each element is represented by a chemical symbol consisting of letters

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3 years ago