To determine the amount of heat released upon complete combustion of 1 mol of methane, we simply multiply the heat of combustion of methane with the mass of methane. In this case, first, we need the molar mass of methane to convert the moles of methane given to grams of methane. We then have the following equation:
1 mol CH₄ x 16.0425 g/ mol CH₄ x 50.1 kJ/ g CH₄ = 803.73 kJ
Thus, the heat generated upon complete combustion of 1 mol of CH₄ is 803.73 kJ
Answer:
D. All of the above
Explanation:
E = MC² is a common equation in physics.
E is energy
M is mass
C is the speed of light
The law was stated by Albert Einstein.
- From this law, it was shown that energy is released when matter is destroyed.
- Mass and energy are equivalent as seen in nuclear reactions where mass is converted to energy.
- Mass and energy is usually conserved in any process and this is a subtle modification of the law of conservation of matter and energy.
- Most of these postulates apply to nuclear reactions which generally do not follow some precepts of chemical laws.
Atomic mass S = 32.0 a.m.u
1 mole S ------------- 32.0 g
0.300 moles S ------ ??
0.300 x 32.0 / 1 => 9.6 g of S
Answer:
20 neutrons
Explanation:
neutrons = mass number - atomic number
mass number = 39, atomic number = 19
neutrons = 39 - 19 = 20