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KIM [24]
3 years ago
10

Calculate the volume of solvent present in a 55.5% by volume of 10.5 mL alcohol solution.

Chemistry
1 answer:
Mazyrski [523]3 years ago
8 0

Answer:

I dont know

Explanation:

good luck

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This equation is balanced
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Which is a cause of physical weathering but not of chemical weathering ??
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A coffee-cup calorimeter initially contains 125 g water at 24.28C. Potassium bromide (10.5 g), also at 24.28C, is added to the w
iren2701 [21]

Answer:

The solution is given below

Explanation:

Heat, q= mc∆T

q= 125g x 4.18 J/g∙°C x (21.18x- 24.28) °C

q=  -1619.75J

NEGATIVE SIGN INDICATES THAT HEAT IS ABSORBED.

Enthalpy Change, ∆H = 1619.75 7/ 10.5 g

                                     = 154.26 J/g

No. of moles of KBr = Mass of KBr/ Molecular Weight of KBr

                                =10.5g/119gmol-1

                                =0.088 mol

∆H= 1619.75 J/ 0.088 mol

      = 18.41 kJ/mol  

6 0
3 years ago
What does the difference in potential energy between the reactants and products represent? A. It represents the energy required
Scrat [10]

Answer:

B. It represents the change in enthalpy for the reaction.

Explanation:

The potential energy diagram for a chemical reaction shows its potential energy plotted against the reaction progress coordinate. The potential energy diagram shows how the potential energy of reactants and products vary as reactants are converted into products.

The potential energy of the system refers to energy stored in the chemical bonds of reactants and products. The difference between the potential energy of reactants and products is known as the enthalpy of reaction. This difference in potential energy may be positive or negative. A positive difference in potential energy implies an endothermic reaction while a negative difference in potential energy implies an exothermic reaction.

6 0
2 years ago
How many neutrons does the isotope lithium have<br> A.) 3 <br> B.) 5 <br> C.) 8 <br> D.) 4
Fantom [35]
The answer is D they have 4 neutrons
6 0
2 years ago
Read 2 more answers
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