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kkurt [141]
3 years ago
11

Plzz answer it's my last question 30 pts

Chemistry
2 answers:
Soloha48 [4]3 years ago
6 0

Answer:

The answer is C.

Explanation:

Its C because the energy in the rollercoaster is being stored, getting ready to become kinetic energy. Hope this helps!

andrezito [222]3 years ago
4 0
C cuz FORCE AND MOTION
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Whichever one has a negative enthalpy value.
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Which of the following chemical formulas are incorrect?
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Answer:

The answer to your question is:

Explanation:

Which formulas are incorrect:

NaO₂       Incorrect                     Na₂O    correct

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6 0
3 years ago
2. Using the following data, calculate the average atomic mass of magnesium (give your answer to the nearest
Savatey [412]

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Explanation:

4 0
3 years ago
A 25.0g tin sample was placed in boiling water at 99.5 C until it had the same temperature. Afterwards, the tin sample was place
MrMuchimi

Answer : The specific heat of tin is, 0.213 J/g.K

Explanation :

Formula used :

q=m\times c\times (T_{final}-T_{initial})

where,

q = amount of heat lost = -399.4 J

c = specific heat capacity of tin = ?

m = mass of tin = 25.0 g

T_{final} = final temperature = 24.5^oC=273+24.5=297.5K

T_{initial} = initial temperature = 99.5^oC=273+99.5=372.5K

Now put all the given values in the above formula, we get:

-399.4J=25.0g\times c\times (297.5-372.5)K

c=0.213J/g.K

Therefore, the specific heat of tin is, 0.213 J/g.K

7 0
3 years ago
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