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Arada [10]
3 years ago
12

Why don't noble gases bond?

Chemistry
1 answer:
Luba_88 [7]3 years ago
7 0
<span>Their outer shells are filled So much that they don't need to bond or react with any other atoms.</span>
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Watch the video that shows using the dilution method to make a solution of known concentration. Note that while the video shows
Nady [450]

Answer:

2.6\times 10^{-6}\ moles

Explanation:

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For potassium permanganate :

Molarity = 2.6\times 10^{-4}\ M

Volume = 10.0 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 10.0×10⁻³ L

Thus, moles of potassium sulfate :

Moles=2.6\times 10^{-4} \times {10.0\times 10^{-3}}\ moles

Moles of potassium permanganate = 2.6\times 10^{-6}\ moles

4 0
3 years ago
What is conserved during all chemical reactions?
Stels [109]

Answer:

In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. ... The law of conservation of mass states that the total mass of substances taking part in a chemical reaction is conserved during the reaction.

Explanation:

8 0
2 years ago
Using the table above, calculate the atomic mass of the unknown element.
sleet_krkn [62]
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6 0
2 years ago
Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 97. g of octane is mi
zhannawk [14.2K]

Answer: 61 grams

Explanation:

To calculate the number of moles, we use the equation:

\text{Number of moles of octane}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{97g}{114g/mol}=0.85moles

\text{Number of moles of oxygen}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{150g}{32g/mol}=4.69moles

The chemical equation for the combustion of octane in oxygen follows the equation:

2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O

By stoichiometry of the reaction;

25 moles of oxygen react with 2 moles of octane

4.69 moles of oxygen react with=\frac{2}{25}\times 4.69=0.37  moles of octane

Thus, oxygen is the limiting reagent as it limits the formation of product and octane is the excess reagent.

25 moles of oxygen produce 18 moles of water

4.69 moles of oxygen produce=\frac{18}{25}\times 4.69=3.38  moles of water.

Mass of water produced=moles\times {\text{Molar mass}}=3.38\times 18g/mol=61g

The maximum mass of water that could be produced by the chemical reaction is 61 grams.

6 0
2 years ago
How many grams of sodium chloride are present in a 0.75 m solution with a volume of 500.0 milliliters?
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