Response: The updated temperature stands at 10643 K
Clarification:
The combined gas law integrates Boyle's law, Charles's law, and Gay-Lussac's law.
The equation for this law is given by:
where,
= initial gas pressure = 750.0 mm Hg = 0.98 atm (760mmHg=1atm)
= final gas pressure = 3.50 atm
= initial gas volume = 2.00 L
= final gas volume = 20.0 L
= initial gas temperature = 
= final gas temperature =?
Now substituting all the stated values into the equation, we obtain:
Thus, the new temperature results in 10643 K
Elemental zinc replaces copper
Explanation:
During this reaction, the zinc added to the copper sulfate solution has replaced the copper present in the compound.
This process is known as a single displacement reaction.
Zn + CuSO₄ → ZnSO₄ + Cu
This represents the reaction in the recycling process.
The reaction is influenced by the elements' positions within the reactivity series of metals.
- In a single displacement reaction, an element higher in the reactivity series displaces one that is lower.
- Zinc ranks above copper in this series, allowing it to react with sulfate.
- Consequently, copper is pushed out as a solid product in the solution.
- Elements positioned higher in this series exhibit greater reactivity
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Chemical reaction
Answer:
Refer to the explanation.
Explanation:
Formation reactions involve the creation of one mole of a compound from its elements in their standard states.
NaBr (s)
The equation for the standard formation is
Na (s) + (1/2)Br₂ (g) → NaBr (s)
As per appendix C, the standard heat of formation for NaBr(s) is
ΔH∘f = -359.8 kJ/mol.
SO₃ (g)
The equation for the standard formation is
S (s) + (3/2) O₂ (g) → SO₃ (g)
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ΔH∘f = -395.2 kJ/mol.
Pb(NO₃)₂ (s)
The equation for the standard formation is
Pb (s) + N₂ (g) + 3O₂ (g) → Pb(NO₃)₂ (s)
According to appendix C, the standard heat of formation for Pb(NO₃)₂(s) is
ΔH∘f = -451.9 kJ/mol.
I hope this is helpful!
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Answer:
THE MOLAR MASS OF XCL2 IS 400 g/mol
THE MOLAR MASS OF YCL2 IS 250 g/mol.
Explanation:
We derive the molar mass of XCl2 and YCl2 by recalling the molar mass formula when both mass and the number of moles are known.
Number of moles = mass / molar mass
Molar mass = mass / number of moles.
For XCl2,
mass = 100 g
number of moles = 0.25 mol
Thus, molar mass = mass / number of moles
Molar mass = 100 g / 0.25 mol
Molar mass = 400 g/mol.
For YCl2,
mass = 125 g
number of moles = 0.50 mol
Molar mass = 125 g / 0.50 mol
Molar mass = 250 g/mol.
Accordingly, the molar masses for XCl2 and YCl2 are 400 g/mol and 250 g/mol, respectively.
5060 has three significant figures: Below is the clarification
Explanation:
Significant figures
Significant figures (also referred to as significant digits and decimal places) in a number are those digits that carry substantial meaning.
These include all digits except: leading zeros.
Guidelines for determining significant figures
1. All non-zero digits are counted as significant. For instance, the number 23 has two significant figures.
2. Zeros located between two non-zero digits are significant; for example, 202.1201 contains seven significant figures.
3. Zeros preceding the significant figures are not significant. For example,.000021 has two significant figures, with zeros being non-contributory.
4. Zeros following the significant figures are significant.
This explains why the number 5060 has three significant figures.
