Answer:
It lets people prepare for future weather hazards:
- If, in certain months and on certain dates, the past data shows that there's a history of rain or heat stroke on those days, people can prepare in the future for those events.
- They can also expect wind speeds, temperatures and stuff like that!
Answer:
5.36 grams the mass in grams of zinc nitrate the chemist has added to the flask.
Explanation:
Moles of zinc nitrate = n
Volume of the solution = 135.0 mL = 0.1350 L
Molarity of the solution = 0.21 M
Mass of 0.02835 moles of zinc nitrate:
0.02835 mol × 189 g/mol = 5.358 g ≈ 5.36 g
5.36 grams the mass in grams of zinc nitrate the chemist has added to the flask.
Answer:
Explanation:
As an example, the following cell reaction: Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(m) generates a cell voltage of +1.10 V under standard conditions. Calculate and enter delta G degree (with 3 sig figs) for this reaction in kJ/mol.
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(m)
ΔG = ΔG° + RTInQ
Q = 1
ΔG = ΔG°
ΔG = =nFE°
n=no of electrons transfered.
E° = 1.1v
ΔG° = -2 * 96500 * 1.10
= -212300J
ΔG° =-212.3kJ/mol
<h3>Therefore, the ΔG° = -212.3kJ/mol</h3>
the solute is dissolved in the solvent.
the solvent is able to dissolve other substances.
a solution is a special type of homogeneous mixture composed of two or more substances, meaning that its composition is identical in every sample.
hope i helped, good luck!
<h2>The molar enthalpy of decomposition of magnesium oxide is 602 kJ.</h2><h3>FURTHER EXPLANATION</h3><h3><u>
Enthalpy is an Extensive Property</u></h3>
Enthalpy is the amount of heat in a system at constant pressure. It is an extensive property. Extensive properties are characteristics that are affected by the amount of substance. Examples of extensive properties are mass and length. The opposite of extensive properties are intensive properties. These are properties that are unique to a substance. They do not vary with the amount. Examples are density and boiling point.
Equations with enthalpy values are called thermochemical equations. The value of the ΔH is specific to the stoichiometric ratio provided in the equation. Therefore, the ΔH value of -1204 kJ is specific for the formation of 2 moles of magnesium oxide. The molar ΔH of formation should then be half of this which is -602 kJ.
<h3><u>
Enthalpy depends on the direction of the reaction.</u></h3>
The direction of the reaction influences the enthalpy of the reaction. If the reaction is reversed, the enthalpy of the reversed reaction is equal in magnitude but opposite the sign of the forward reaction.
In this case, the reverse reaction of the formation of magnesium oxide is its decomposition. Therefore, the decomposition of one mole of magnesium oxide will have an enthalpy of +602 kJ.
<h3>LEARN MORE</h3>
- Learn more about Molar Enthalpy of Combustion brainly.com/question/10936616
- Learn more about Hess' Law brainly.com/question/3194633
- Learn more about Specific Heat Capacity brainly.com/question/12976104
Keywords: Enthalpy of formation, enthalpy of decomposition
