Answer: Option B) They are chemical reactions that give off energy and increase the temperature of the surroundings.
Explanation:
Exothermic reactions are chemical reaction that occurs spontaneously and brings about the release of energy (in form of heat) to raise the temperature of their surroundings. Hence, the reacting vessel feels hot as the reaction proceeds to completion.
An example of exothermic reaction is the reaction between an acid and base
The balanced equation for the reaction is N2 + 3H2 --> 2NH3. Thus, the mole ratio of nitrogen to ammonia in the balanced equation is 1:2<span>.</span>
Answer:
Its B Nylon
Explanation:
i just took the quiz and got it right.
<span>he balanced equation for the reaction is
4Fe + 3O</span>₂ ---> 2Fe₂O₃<span>
stoichiometry of O</span>₂ to Fe₂O₃ is 3:2
number of O₂ moles used up - mass present / molar mass of O₂
number of O₂ moles = 63.98 g / 32 g/mol = 1.999 mol
if 3 mol of O₂ forms 2 mol of Fe₂O₃
then 1.999 mol of O₂ forms - 2/3 x 1.999 mol = 1.333 mol
answer is A) 1.333 mol of Fe₂O₃ are formed
A solid will always hold its shape as long as there are no item/forces acting on it.
Liquids, plasma, and gases will never hold a shape on there own, mostly all liquids only hold the shape there given. Gases never really have a shape.And plasma is a form of energy, so its more like the gas, it has to be given a shape/container.
Answer :B
Hope this helps
