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Nikolay [14]
3 years ago
7

A marble is given potential energy by being placed at Location W. When the marble released, it rolls down the track.

Chemistry
2 answers:
lubasha [3.4K]3 years ago
4 0

Answer:b

Explanation:

ira [324]3 years ago
3 0

Answer:the answer is c , location Y

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Which of the following electronic transitions would emit the lowest energy photon?
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Answer:

i will think c-n=3 to NM=2

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3 years ago
How do you know that a sealed calorimeter is a closed system?
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Answer: Option (c) is the correct answer.

Explanation:

When a system is open then there will be exchange of energy between the system and surrounding.

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Thus, we can conclude that a sealed calorimeter is a closed system because thermal energy is not transferred to the environment.

5 0
3 years ago
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20.0 g of bromic acid, HBrO3, is reacted with excess HBr.
Blababa [14]

After Rounding off The percentage yield is 64%

<h3>What is Percentage Yield ?</h3>

It is the ratio of actual yield to theoretical yield multiplied by 100% .

It is given in the question

20.0 g of bromic acid, HBrO3, is reacted with excess HBr.

The reaction is

HBrO₃ (aq) + 5 HBr (aq) → 3 H₂O (l) + 3 Br₂ (aq)

Actual yield = 47.3 grams

Molecular weight of Bromic Acid is 128.91 gram

Moles of Bromic Acid = 20/128.91 = 0.155 mole

Mole fraction ratio of Bromic Acid to Bromine is 1 :3

Therefore for 0.155 mole of Bromic Acid 3 * 0.155 = 0.465 mole of Bromine is produced.

1 mole of Bromine = 159.8 grams of Bromine

0.465 of Bromine = 74.31 grams of Bromine

Percentage Yield = (47.3/74.31)*100 = 63.65 %

After Rounding off The percentage yield is 64% .

To know more about Percentage Yield

brainly.com/question/22257659

#SPJ1

5 0
1 year ago
Identify and describe the different forms of precipitation shown in the images.
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Sleet and hail, sleet are tiny drops of water that freeze when it rains. Hail forms when a thunderstorm lifts a water droplet above the freezing level.

Explanation:

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2 years ago
All of the following institutions awards certificates except: a.) Community college b.) liberal arts college c. Junior college d
Serjik [45]
Except B, Liberal Arts College
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3 years ago
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