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UkoKoshka [18]
3 years ago
11

Please help do not understand!!!!!!!!!!!!!!!

Chemistry
1 answer:
makvit [3.9K]3 years ago
7 0

Answer:

If your asking how much the reactions weigh separately than it should be 25

Explanation:

25 +25=50

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calculate the heat required in joules to convert 18.0 grams of water ice at a temperature of -20 c to liquid water at the normal
KIM [24]

Answer:

Explanation:

Heat required to convert ice to ice at 0⁰C

= mass x specific heat x rise in temperature

= 18 x 2.09 x 20

= 752.4 J .

heat required to convert ice at 0⁰C to water at 0⁰C

mass x latent heat of fusion

= 18 x 336

= 6048 J

Heat required to increase the temperature of water to 100⁰C

= 18 x 4.2 x 100

= 7560 J

Total heat required

7560 + 6048 + 752.4

= 14360.4 J

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2 years ago
Which of following statements is true about scientific knowledge? Scientific ideas are not subject to change, so scientific know
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Answer:

The accepted views of science knowledge can change over time. Changes can result from new science observations, but can also be affected by social, political or religious convictions. To develop a deeper understanding, students need to investigate the context of the time in which science ideas were developed.

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3 years ago
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Flura [38]
A should be the answer.
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Rachel burns a 53 gram cracker under a soda can filled with 68.7 grams of water. She took the temperature of the water before sh
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3 years ago
If an object has an acceleration of 9.8 m/s and a force of 58.8N what is the mass of an object ? What could the object be
Makovka662 [10]

Answer:

The mass of an object  is 0.6122 Kg

Explanation:

Given:

Acceleration  = 9.8 m/s

Force  = 58.8 N

To Find:

Mass of an object = ?

Solution:

We know that according to newtons 2nd law

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F= ma

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m = mass

a =  Acceleration

Substituting the values,

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3 years ago
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