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vredina [299]
2 years ago
12

I really need help guys in order to pass this. its kinda urgent!

Chemistry
1 answer:
lbvjy [14]2 years ago
6 0
Female energy the answer is the first one
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125.0 g of an unknown substance is heated to 97.0°C. It is then placed in a calorimeter than contains 250g of water with an init
Sveta_85 [38]
The heat released by the substance in the calorimeter is equal to  the heat absorbed by water which results to the decrease and increase in temperature, respectively.
We use m Cp ΔT to balance the heat involved 

(m Cp ΔT) subs in calorimeter = <span>(m Cp ΔT) water
</span>125 g * Cp * (97.0-23.5 ) C = 250 g *(4.18 J/C g)* (23.5-20)
Cp = 0.398 J/Cg

Answer is B 
4 0
3 years ago
Read 2 more answers
from the balanced equation we see that h20 is 1 to 1 mole ratio the number of moles of acid and base. What is the number of mole
forsale [732]

Answer:

0.0498 mol

Explanation:

Number of moles = concentration in mol/L × volume in L

Concentration = 1 M = 1 mol/L

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3 years ago
What does every atom of the same element have in common
VikaD [51]
All atoms of the same element have the same
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3 years ago
The figure below represents a reaction.What type of reaction is shown?
o-na [289]
Are you sure it isn’t SO3+H2O = H2SO4 because that would be combination (synthesis) A+ B=AB

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7 0
2 years ago
A slingshot that has been pulled back but has not been let go.
Elden [556K]

Answer: Potential energy

Explanation: i hope i wasnt toooo late

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