1 answer:
Answer:
m = 1538.5 g
Explanation:
To answer this question, use the equation for specific heat:
Where q is the total heat energy, m is the mass, c is the specific heat of the substance (in this case water), and delta T is the temperature change.
You will be expected to know the specific heat of water, which is 4.186 J/g/C. Using the information in the question:
The final answer, 1538.5 g, is closest.
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Molar mass of C= 12g/mol
2C= 2*12g/mol= 24g/mol
Molar Mass of F=19g/mol
4F= 4*19g/mol= 76g/mol
Total molar mass of C2F4 = (24g/mol+76g/mol)= 100g/mol
Now you need to find the moles of Fluorine
Moles= Mass/molar mass
Moles of Fluorine = 5.71g/100g/mol=0.0571mol of Fluorine
To find the number of atoms you multiply moles by Avogadro's number(
)
So the number of Fluorine atoms= 0.0571* 6.022x10^23= 3.44x10^22 atoms or
atoms
2C= 2*12g/mol= 24g/mol
Molar Mass of F=19g/mol
4F= 4*19g/mol= 76g/mol
Total molar mass of C2F4 = (24g/mol+76g/mol)= 100g/mol
Now you need to find the moles of Fluorine
Moles= Mass/molar mass
Moles of Fluorine = 5.71g/100g/mol=0.0571mol of Fluorine
To find the number of atoms you multiply moles by Avogadro's number(
So the number of Fluorine atoms= 0.0571* 6.022x10^23= 3.44x10^22 atoms or