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nadya68 [22]
3 years ago
9

Which of the following releases the greatest amount of energy as it proceeds? Assume the same mass of starting material is used

in each.
A. solidification
B. condensation
C. nuclear reaction
D. chemical reaction
Chemistry
1 answer:
Ivanshal [37]3 years ago
4 0
The answer should be <span>C. nuclear reaction.</span>
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What mass (in g) of potassium chlorate is decomposed if the yield of oxygen gas for the first reaction is 88.6%, if it is known
Ainat [17]

Using the stoichiometry and the number of moles involved in the reaction, The mass of KClO3 decomposed is 63.73 g.

Let us take it up from the second reaction;

Using stoichiometry , the equation of the reaction is;

CH4 + 2O2 ⟶ CO2 + 2H2O

Number of moles of CO2 produced = mass/molar mass

Actual yield of CO2 = 23.6 * 100/77.8 = 30.33 g

Number of moles in 30.33 g of CO2 = 30.33 g/44 g/mol = 0.69 moles

From the reaction equation;

2 moles of O2 yields 1 mole of CO2

x moles of O2 yields 0.69 moles of CO2

x = 2 *  0.69 /1

x = 1.38 moles of O2.

Mass of O2 used =  1.38 moles * 32 g/mol = 44.16 g

This becomes the actual yield of the first reaction.

Theoretical yield of oxygen = 44.16 g * 100/88.6

= 49.84 g of O2

Number of moles of O2 = 49.84 g/32 g/mol = 1.56 moles

Given the reaction equation;

KClO3 ⟶ 2KCl + 3O2

1 mole of KClO3 yields 3 moles of O2

x moles of O2 yields 1.56 moles of O2

x =  1 * 1.56/3

= 0.52 moles of KClO3

Mass of KClO3 decomposed = 0.52 moles * 122.55 g/mol = 63.73 g of KClO3

Learn more: brainly.com/question/9743981

7 0
2 years ago
PLEASE HELP WILL GIVE BRAINLIEST!!!
My name is Ann [436]

Answer: It's the anode broski (B)

Explanation: I'm taking the Chem summer course too broski, this was the correct answer. Cheers broski

8 0
3 years ago
A sample of carbon-12 has a mass of 6.00 g. How many atoms of carbon-12 are in the sample?
Serjik [45]
<em>mC: 12g/mol</em>

12g ------- 6,02·10²³ a.
6g ---------  X
X = (6×<span>6,02·10²³)/12
</span><u>X = 3,01·10²³ atoms</u>

---->>> A :)

4 0
3 years ago
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You are doing an experiment about the diet of mice. You want to see how the amount of salt in a mouse's food affects how much wa
Radda [10]

A variable, which is controlled or changed in a scientific experiment to examine the influences on the dependent variable is known as an independent variable. On the other hand, a dependent variable refers to the variable, which is being measured and tested in a scientific experiment.  

In the given case, one is observing that how the amount of salt in a mouse food influences the water the mouse drinks. Thus, the amount of salt in the food in the given case is an independent variable, as one can determine the amount of water consumed by the mouse, by manipulating the amount of salt intake given to the mouse.  

Hence, the correct answer is option B.  


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Which element is very toxic and reactive green gas?
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I would answer this but i have to go to bed i have a reading test tommorow
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