Physics, 18.09.2021 09:00, hardworker9437
When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The equation is shown.
H2 + I2 → 2HI
What is the total energy of the reaction? Is this an endothermic or exothermic reaction? (1 point) A. -9 kJ/mol, endothermic
B. 9 kJ/mol, exothermic
C. 9 kJ/mol, endothermic
D. -9 kJ/mol, exothermic
Answers: 2
Physics, 22.06.2019 12:00, jazz8224
The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?
Answers: 3
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