Answer:
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Explanation:
Answer:
Heat, Q = 262 kJ
Explanation:
Given that,
Mass of a sample, m = 750 g
Initial temperature, ![T_i=95^0\ C](https://tex.z-dn.net/?f=T_i%3D95%5E0%5C%20C)
Final temperature, ![T_f=17^0\ C](https://tex.z-dn.net/?f=T_f%3D17%5E0%5C%20C)
The specific heat of the sample, ![c=4.18\ J/g^0 C](https://tex.z-dn.net/?f=c%3D4.18%5C%20J%2Fg%5E0%20C)
We need to find the amount of heat released. The amount of heat released is given by the formula as follows :
![Q=mc\Delta T\\\\Q=750\times 4.48\times (17-95)\\\\Q=-262080\ J\\\\Q=-262\ kJ](https://tex.z-dn.net/?f=Q%3Dmc%5CDelta%20T%5C%5C%5C%5CQ%3D750%5Ctimes%204.48%5Ctimes%20%2817-95%29%5C%5C%5C%5CQ%3D-262080%5C%20J%5C%5C%5C%5CQ%3D-262%5C%20kJ)
So, 262 kJ of heat is released by the sample.
374u
187u
C₁₄H₂₂N₄O₈
Explanation:
To find the molecular weight of the compound C₁₄H₂₂N₄O₈ we simply sum that atomic masses of the given elements in the compound.
The empirical weight is determined by using the simplest ratio of the elements involved in the compound;
Molecular weight of C₁₄H₂₂N₄O₈;
atomic mass of C = 12g/mol
H = 1g/mol
N = 14g/mol
O = 16g/mol
Molecular weight = 14(12) + 22(1) + 4(14) + 8(16)
= 168 + 22 + 56 + 128
= 374u
Empirical weight:
Empirical formula:
C₁₄ H₂₂ N₄ O₈
14 : 22 : 4 : 8
divide by 2:
7 : 11 : 2 : 4
empirical formula C₇H₁₁N₂O₄
empirical weight =
=
= 187u
The molecular formula is the actual combination of atoms in a compound. so the molecular formula of the compound is C₁₄H₂₂N₄O₈
learn more:
Molecular mass brainly.com/question/5546238
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Volume of a cylinder: V= pi (r)^2(h)