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sweet [91]
3 years ago
14

In which reaction would the activation energy result in an endothermic reaction?

Chemistry
2 answers:
miv72 [106K]3 years ago
7 0

Answer : The correct option is, An egg cooking

Explanation :

  • Endothermic reaction : It is a type of chemical reaction in which the energy is absorbed from the surrounding.
  • Exothermic reaction : It is a type of chemical reaction in which the energy is released into the surrounding.

Water freezing  : It is an exothermic process. In this process, the heat is released when the phase changes from the liquid state to solid state.

An egg cooking  : It is an endothermic process. In this process, the heat is absorbed when the phase changes from the solid state to liquid state.

A candle burning : It is an exothermic process because the more amount of  heat is released when candle burns.

Iron rusting : It is an exothermic process because heat is released during the iron rusting process.

Hence, an egg cooking  is an endothermic reaction.

egoroff_w [7]3 years ago
3 0

Just did the test.

Answer is "An egg cooking".

I thought it was a candle burning because it keeps going until the light goes out but was wrong :( lol.

Hope this helps!

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Alum is a compound used in a variety of applications including cosmetics, water purification, and as a food additive. It can be
vlabodo [156]

Answer:

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

Explanation:

Mass of bottle = 10.221 g

Mass of bottle with aluminium pieces = 11.353 g

Mass of aluminium = 11.353 g - 10.221 g = 1.132 g

Mass of alum and bottle = 19.230 g

Mass of alum =  19.230 g - 10.221 g = 9.009 g

Experimental yield of alum =  9.009 g

Theoretical yield of alum:

2Al(s) +2 KOH(aq) +4H_2SO_4(aq)+10 H_2O(l) \rightarrow 2 KAl(SO_4)_2.12 H_2O(s)+3H_2(g)

Moles of aluminium = \frac{1.132 g}{27 g/mol}=0.041926 mol

According to reaction, 2 moles of aluminum gives 2 moles of alum.

Then 0.041926 mol aluminium will give :

\frac{2}{2}\times 0.041926 mol=0.041926 mol of alum.

Mass of 0.041926 moles of alum:

0.041926 mol × 474 g/mol= 19.873 g

Theoretical yield of alum = 19.873 g

Percentage yield:

\% Yield =\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100

Percentage yield of the alum:

\% Yield =\frac{ 9.009 g}{19.873 g}\times 100=45.33\%

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

7 0
3 years ago
A world without friction would it be?<br> Bill Nye Video
cupoosta [38]

Answer:

it opposes motion. the object would continue to slide forever if not stopped by another object.

8 0
2 years ago
1. What elements of an organic organization are apparent from the chapter materials on Zappos? (Refer to Exhibit 11.3)
kompoz [17]

Answer: This topic circles organizational design: structure, culture, and control.

Exhibit 11:3 presentation outlines; Exhibit Mechanistic vs. Organic Organizations: The Building Blocks of Organizational Structure

Zappos is an organic organization. The elements in Zappos as an organization include;

• Low degree of specialization

• Flexible division of labor • Employees focus on "bigger picture" • Clear understanding of organization's core competencies and strategic intent • Domain expertise in different areas • Generalized knowledge of how to accomplish strategic goals valued • Distributed decision making • Vertical (top-down and bottom-up) as well as horizontal communication • Flat structures High span of control • Horizontal as well as two-way vertical communication • Mutual adjustment • Differentiation strategy

Explanation: Do reference the exhibit in order source with keywords " Zappos - Exhibit Mechanistic vs. Organic Organizations: The Building Blocks of Organizational Structure"

6 0
3 years ago
What is the molecular formula of a substance whose molar mass is 166.8 grams and its empirical formula is C2H4N2?
Tanzania [10]

Answer:

C4H2O6

Explanation:

8 0
3 years ago
assuming oxygen behaves like an ideal gas, what volume in liters would 3.50 moles of oxygen gas occupy at STP?
astra-53 [7]

Answer:

78.4L

Explanation:

1 mole of any gas is found to occupy 22.4L at stp. This also indicates that 1mole of oxygen occupy 22.4L.

Therefore,

3.50 moles of oxygen Will occupy = 3.5x22.4 = 78.4L

6 0
3 years ago
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