If the solution process is endothermic, then an increase in temperature usually results in:an increase in solubility
a decrease in solubility
no change in the solubility
a slower reaction
Answers
If the solution process is endothermic, then an increase in temperature usually results in an increase in solubility. Their heat of reaction is usually positive. The rest of the choices do not answer the question above.
Answer:
solubility increases
Explanation:
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The temperature at the point of intercept of the plotted data with the Temperature axis is:600°C-273°C-160°C50°C
What is the percentage of nitrogen in N2O
Compute 3.5×4.48697. Round the answer appropriately. Express your answer numerically using the proper number of significant figures.
"Contagion" Movie questions!I have a few questions about the movie.1. What type of pathogenic agent was the disease and what was the name of it?2. Dr. Ellis Cheever (played by Lawrence Fishburne) explains that the spread of the disease is dependent on factors such as "nutrition, underlying conditions, socioeconomic factors and access to clean drinking water." Explain the validity of this statement. 3. Explain the irony of the following statement made by Dr. Cheever" Shaking hands was a way of showing someone you werent carrying a weapon in the old days"
Answers
2K₃PO₄ + 3NiCl₂ ---> 6KCl + Ni₃(PO₄)₂
stoichiometry of K₃PO₄ to NiCl₂ is 2:3
the number of NiCl₂ moles reacted - 0.0110 mol/L x 0.154 L = 1.69 x 10⁻³ mol
if 3 mol of NiCl₂ reacts with - 2 mol of K₃PO₄
then 1.69 x 10⁻³ mol of NiCl₂ reacts with - 2/3 x 1.69 x 10⁻³ = 1.13 x 10⁻³ mol of K₃PO₄
molarity of K₃PO₄ solution given - 0.205 M
there are 0.205 mol in 1 L
therefore 1.13 x 10⁻³ mol are in - 1.13 x 10⁻³ mol / 0.205 mol/L = 5.51 mL
volume of K₃PO₄ required - 5.51 mL
Answers
ΔG = ΔH – TΔS < 0
For a spontaneous reaction to occur, ΔG must be negative. Following the equation, ΔH must be < 0, and ΔS must be > 0 for a reaction to be spontaneous at all temperatures. However, the given values have a negative value for both enthalpy and entropy. This means that spontaneity can only occur below a certain temperature, which can be calculate by setting ΔG as zero. This gives:
ΔG = ΔH – TΔS = 0
T = ΔH/ΔS = -50/-0.3 = 166.67 Kelvin
Anything below that temperature gives a negative ΔG, making it spontaneous.
Final answer:
The reaction is spontaneous at temperatures greater than 166.7 K.
Explanation:
To determine the temperature at which the reaction is spontaneous, we can calculate the Gibbs free energy change (ΔG) using the equation ΔG = ΔH - TΔS, where ΔH is the enthalpy change and ΔS is the entropy change. Since the reaction is spontaneous below a certain temperature, we can assume that at this temperature, ΔG is negative. Thus, we have -50.0 kJ - T(-0.300 kJ/K) < 0. Solving for T, we find that the reaction is spontaneous at temperatures greater than 166.7 K.
Learn more about Spontaneity of reaction here:
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c. stratosphere
b. mesosphere
d. exosphere
Answers
Answer: Option (c) is the correct answer.
Explanation:
A layer above the troposphere and below the mesosphere is known as stratosphere.
This layer of stratosphere contains about 90% concentration of ozone and there is no occurrence of weather in this layer.
The occurrence of ozone in stratosphere makes it warmer.
Therefore, we can conclude that the stratosphere contains the highest concentration of ozone.
plz help
Answers
Explanation:
General Rules. In general, the electropositive character of the oxide's central atom will determne whether the oxide will be acidic or basic. The more electropositive the central atom the more basic the oxide. The more electronegative the central atom, the more acidic the oxide.
- Use 6.022x1023 for avogadro’s number
- Ignore sig figs and do not round the final answer.
- Keep it to 1 decimal place.
Answers
Answer:
a) 13.2 moles
b) 79.33 grams of
Explanation:
First, we'll need to balance the equation
→
There are 2 (O) on the left and only one on the right, so we'll add a 2 coefficient to the right.
→
Now there are 4 (H) on the right and only 2 on the left, so we'll add a 2 coefficient to the () on the left.
→
The equation is now balanced.
a) This can be solved with a simple mole ratio.
4.6 moles ×
= 13.2 moles
b) This problem is solved the same way!
2.2 moles ×
= 2.2 moles
However, this problem wants the mass of , not the moles.
The molecular weight of is the weight of 4 (H) molecules and 2 (O) molecules (found on the periodic table). So,
4(1.008) + 2(15.999) = 36.03 g/mol
2.2 moles ×
= 79.33 grams of
Answers
Answer:
The answer to your question is 2 moles of Carbon
Explanation:
Carbon-12 means it has a molecular mass of 12g / mol. Mol is defined as the number of grams of an atom in one mol.
To solve this problem, we use proportions
12 g of Carbon ---------------- 1 mol of Carbon
24 g of Carbon -------------- x
x = ( 24 g x 1 mol ) / 12 g
x = 24 / 12
x = 2 mol of Carbon
Answer:
2 moles
Explanation:
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