Answer:
it would not melt at a specific point
Explanation:
becuase it is not pure
Answer:A
Explanation:
Your muscular system is at work
Answer:
m = 7.29 grams
Explanation:
Given that,
Initial temperature, T₁ = 25ºC
Final temperature, T₂ = 31.5ºC
The specific heat of the metal is 0.89 J/gºC.
We know that the heat released due to the change in temperature is given by :
![Q=mc\Delta T\\\\m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{42.2 }{0.89\times (31.5-25)}\\\\m=7.29\ g](https://tex.z-dn.net/?f=Q%3Dmc%5CDelta%20T%5C%5C%5C%5Cm%3D%5Cdfrac%7BQ%7D%7Bc%5CDelta%20T%7D%5C%5C%5C%5Cm%3D%5Cdfrac%7B42.2%20%7D%7B0.89%5Ctimes%20%2831.5-25%29%7D%5C%5C%5C%5Cm%3D7.29%5C%20g)
So, the mass of the piece is equal to 7.29 grams.
The reaction H2SO4 + 2 NaOH -> Na2SO4 + 2H2O applies to an acid-base titration.
moles NaOH = c · V = 0.2423 mmol/mL · 32.23 mL = 7.809329 mmol
moles H2SO4 = 7.809329 mmol NaOH · 1 mmol H2SO4 / 2 mmol NaOH = 3.9046645 mmol
Hence
[H2SO4]= n/V = 3.9046645 mmol / 37.21 mL = 0.1049 M
The answer to this question is [H2SO4] = 0.1049 M