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lord [1]
3 years ago
6

Sean drew this diagram and labeled an unknown gas as gas A. Which gas does A represent?

Chemistry
2 answers:
Ronch [10]3 years ago
8 0

Answer: choice C) carbon dioxide.

Explanation: The given diagram is showing the gas coming from the house(kitchen), birds and animals.

In kitchens, the fuel is burned to cook the food and a combustion reaction takes place when the fuel is burned. Combustion of hydrocarbon fuels produces water and carbon dioxide gas.

In respiration process, animals inhale oxygen gas and exhale carbon dioxide gas.

So, the gas A in the diagram must be representing carbon dioxide gas and hence the correct choice is option C) carbon dioxide.

ANEK [815]3 years ago
3 0
Gas A is Carbon Dioxide
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Doing a bungee jumping

Potential energy ---> Kinetic energy

Explanation:

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A satellite can move around Earth in a circular orbit at constant height because
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Suppose you are working with a NaOH stock solution but you need a solution with a lower concentration for your experiment. Calcu
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Answer: The volume of the 1.224 M NaOH solution needed is 26.16 mL

Explanation:

In order to prepare the dilute NaOH solution, solvent is added to a given amount of the NaOH stock solution up to a final volume of 250.0 mL.

Since only solvent is added, the amount of the solute, NaOH, in the dilute solution is the same as in the volume taken from the stock solution.

Molarity (<em>M)</em> is calculated from the following equation:

<em>M</em> = <em>n</em> ÷ <em>V</em>

where <em>n</em> is the number of moles of the solute in the solution, and <em>V</em> is the volume of the solution.

Accordingly, the number of moles of the solute is given by

<em>n</em> = <em>M</em> x <em>V</em>

Now, let's designate the stock NaOH solution and the dilute solution as (1) and (2), respectively . The number of moles of NaOH in each of these solutions is:

<em>n </em>(1) = <em>M </em>(1) x <em>V </em>(1)

<em>n </em>(2) = <em>M </em>(2) x <em>V </em>(2)

As the amount of NaOH in the dilute solution is the same as in the volume taken from the stock solution,

<em>n</em> (1) = <em>n</em> (2)

and

<em>M</em> (1) x <em>V</em> (1)<em> </em>= <em>M</em> (2) x <em>V</em> (2)

For the stock solution, <em>M</em> (1) = 1.244 M, and <em>V</em> (1) is the volume needed. For the dilute solution, <em>M</em> (2) = 0,1281 M, and <em>V</em> (2) = 250.0 mL.

The volume of the stock solution needed, <em>V</em> (1), is calculated as follows:

<em>V</em> (1) = <em>M</em> (2) x <em>V</em> (2) ÷ <em>M</em> (1)

<em>V</em> (1) = 0.1281 M x 250.0 mL ÷ 1.224 M

<em>V </em>(1) = 26.16 mL

The volume of the 1.224 M NaOH solution needed is 26.16 mL.

7 0
3 years ago
What evidence did Mendeleev use to decide that the alkali metals should be in the same group?
Bezzdna [24]

Answer:

they all reacted the same

Explanation:

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An ideal gas has a volume of 5.00L under a pressure of 1.00 atm and a temperature of 10.0 K. If the temperature is changed to 10
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Answer:

6.25 L

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

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