An element has a mass of 39.2 and an atomic number of 19. How many protons does this element have? How many neutrons? How many e
2 answers:
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Answer:
Increasing temperature
Explanation:
Enthalpy of the reaction = -393.5 kJ/mol
Negative sign implies that reaction is exothermic.
Effect of change in reaction condition is explained by Le chateliers principle.
According to Le chateliers principle, if the reaction conditions of a reversible reaction in a state of dynamic equilibirum is changed, the reaction will move in a direction to counteract the change.
1. Increasing the temperature
Forward reaction is exothermic that means temperature increases in forward direction. Backward reaction will be endothermic and so there is decrease in temperature in backward direction or in left direction.
On increasing temperature, reaction will be move in direction to counteract the increased temperature, therefore reaction will move in left direction.
2. Adding O2
If O2 is added, then reaction will move in a direction in which its get consumed. So, reaction will move in forward direction or in right direction.
3. Removing C (s)
Le Chatelier's principle does not apply on solids, so removal of C(s) does not affect the equilibrium.
Taking into account the reaction stoichiometry, 8.8488 grams of (NH₄)₃PO₄ is produced by the reaction of 5.82g of phosphoric acid.
<h3>Reaction stoichiometry</h3>In first place, the balanced reaction is:
H₃PO₄ + 3 NH₃ → (NH₄)₃PO₄
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- H₃PO₄: 1 mole
- NH₃: 3 moles
- (NH₄)₃PO₄: 1 mole
The molar mass of the compounds is:
- H₃PO₄: 98 g/mole
- NH₃: 17 g/mole
- (NH₄)₃PO₄: 149 g/mole
Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
- H₃PO₄: 1 mole ×98 g/mole= 98 grams
- NH₃: 3 moles ×17 g/mole= 51 grams
- (NH₄)₃PO₄: 1 mole ×149 g/mole= 149 grams
The following rule of three can be applied: if by reaction stoichiometry 98 grams of H₃PO₄ form 149 grams of (NH₄)₃PO₄, 5.82 grams of H₃PO₄ form how much mass of (NH₄)₃PO₄?
mass of (NH₄)₃PO₄=
<u><em>mass of (NH₄)₃PO₄= 8.8488 grams</em></u>
Finally, 8.8488 grams of (NH₄)₃PO₄ is produced by the reaction of 5.82g of phosphoric acid.
Learn more about the reaction stoichiometry:
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