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lana [24]
3 years ago
15

How much heat is needed to raise the temperature of a 5.0 gram block of aluminum from 22.0°c to 37.0°c?

Chemistry
2 answers:
Reptile [31]3 years ago
3 0
You'll need the specific heat capacity of aluminium to solve this question.
H=(0.005)(37-22)(specific heat capacity of aluminium)

dimulka [17.4K]3 years ago
3 0

Answer: 67.65 Joules

Explanation:

Q= m\times c\times \Delta T

Q= heat gained

m= mass of the substance = 5.0 g

c = heat capacity of aluminium = 0.902 J/g ° C      

\Delta T={\text{Change in temperature}}=(37-22)^oC=15^0C  

Q=5.0g\times 0.902J/g^oC\times 15^oC

Q= 67.65 Joules

Thus heat gained by 5.0 g of aluminum is = 67.65 Joules

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We have that you can you prepare 450 ml of 1 X buffer A by adding 45ml of 10X buffer A with 405ml(450-45) of water

From the question we are told

If you have 100 ml of 10X Buffer A, how could you prepare 450 ml of 1 X buffer A

Generally the equation for the  Concentration  Volume relationship is mathematically given as

C1V1=C2V2\\\\Where\\\\C1=10X\\\\C2=1X buffer A\\\\V2=450ml \\\\Therefore\\\\V1=\frac{450*1}{10}\\\\V1=45ml

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You can you prepare 450 ml of 1 X buffer A by adding 45ml of 10X buffer A with 405ml(450-45) of water

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