Answer:
- 484 KJ/mol
Explanation:
The reaction equation is;
CH4(g) + F2 (g) ------> CH3F(g) + HF(g)
The enthalpy of the reaction can be calculated from bond energies using the formula;
ΔHreaction = Bond energy of reactants - bond energy of products
or
ΔHreaction = Bonds broken - bonds formed
[4(413) + 1(155) - 3(413) + 1(485) + 1(567)]
[(1652 + 155) - (1239 + 485 + 567)]
[1807 - 2291]
= - 484 KJ/mol
Answer:
October 21, 2012, St. Peter's Basilica, Vatican City by Pope Benedict XVI
Explanation:
Answer:
False because it can absorb SOME energy but not every kind of energy.
Answer: huskies are strong and powerful animals.
Explanation:
The excerpt best supports a central idea in the passage by showing that huskies are strong and powerful animals. This can be seen as it was written that the dog threw his whole weight upon the traces and drove his claws into the frozen trail, calling every muscle into play. This shows the strength possessed by the animal.
Other options are wrong as they didn't show how strong the dog was.
Answer:
A)
Explanation:
b and e kills organisms, so it doesn't evolve the diseases. genetic modification causes the plants to be resistant, and doesnt target diseases, so the disease isnt evolved. only antibiotics make diseases evolve, overuse of it causes the disease to develop resistance if it isnt completely killed off.
