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Marat540 [252]
2 years ago
14

The process in which substances are changed into different substances is called

Chemistry
1 answer:
skad [1K]2 years ago
3 0

Answer:

1. chemical change

2. true

3. an unequal sharing

Explanation:

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Answer:

Replacing the powdered lead oxide with large crystals

Explanation:

The large crystals have less surface area exposed to the other reagents than the powdered  lead oxide. High surface area leads to a high rate of reaction thus the products are formed faster, while a low surface area leads to a lower rate of reaction since the reagent is less exposed to the other reagents.

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Which temperatures are equal? (Refer to the diagram of the thermometer in the lesson.)
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d

Explanation:

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A motor cyclist starts from rest and reaches a speed of 6m/s after travelling with uniform acceleration for 3s. What is his acce
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Answer:

2m/s²

Explanation:

When an object starts or at its state of rest it has an Initial speed U = 0

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total time taken for the acceleration = 3s

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Acceleration is the change in velocity (speed) with time

OR

Time rate of change of velocity

Acceleration = <u>Change in Speed(velocity)</u>

Time taken

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Acceleration = <u> </u><u> </u><u>V - </u><u>U</u><u> </u><u> </u>

t

a = <u>6</u><u> </u><u>-</u><u> </u><u>0</u>

3

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4 0
3 years ago
A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassiu
Lerok [7]

Answer:

The swirling yellow solid formed is lead iodide (PbI₂).

Explanation:

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Which is the frequency of the wave shown?
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The frequency of wave is 0.125 Hz.

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The unit of frequency is the Hz . If time is measured in seconds then frequency will be in Hz. Hz is equal to the per second.

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f = 1/ T

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