Answer:
no, Charon is significantly smaller than Mercury
69. The student's skin was obviously warmer than the initial temperature of the bracelet. According to the second law of thermodynamics, heat transfers from a higher temperature to a lower temperature hence heat transfers from the student's skin to the bracelet warming up the bracelet.
70. moles of copper=mass of copper/molar mass of copper
=30.1g/(63.55g/mol)= 0.4736 moles Cu
71. Delta H( heat released) = mCp(deltaT) = 30.1g(0.385 J/gK)(33-19)K = 162.23J
72. Copper is chemically less active than iron.
Answer:
Mass of carbon = 236.5 g
Explanation:
Given data:
Mass of C₃H₆ = 275 g
Mass of C = ?
Solution:
Formula:
Mass of carbon = molar mass of carbon/ molar mass of compound × mass of compound
Molar mass of carbon = 12 g/mol
Molar mass of compound = 42 g/mol
Mass of carbon = 36 g/mol / 42 g/mol × 275 g
Mass of carbon = 0.86 × 275 g
Mass of carbon = 236.5 g
Answer: Divide the mass of the object by its volume to yield the density of the object. For example, the object density = mass / (Vf – Vi). Compare the measured density to that of pure gold (19.3 g/cc) to determine whether the object is made of pure gold.
Explanation: I searched it
Answer: The answer is D, Coal
hope this helps.
