እነዚህን የያዘ ተማሪ በትንሹ ኢንትራንስ ላይ 10 ጥያቄ ይሰራል ።
📘አንድ የ12ኛ ክፍል ተማሪ ሊያውቃቸው የሚገቡ የ Chemistry ፎርሙላዎች
1. Molarity (Concentration)
• Formula:
M = n / V
where M is molarity (mol/L), n is the number of moles of solute, and V is the volume of solution in liters.
2. Dilution Equation
• Formula:
C₁V₁ = C₂V₂
where C is concentration and V is volume for two different solutions.
3. Ideal Gas Law
• Formula:
PV = nRT
where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin.
4. Gas Constant (R)
• Values:
• R = 0.0821 L ⋅ atm / (mol ⋅ K)
• R = 8.314 J / (mol ⋅ K)
5. Stoichiometry
• General Formula:
moles of A × moles of B / moles of } = moles of B
6. Percent Composition
• Formula:
Percent Composition = (( mass of element / molar mass of compoun} )) × 100
7. Empirical and Molecular Formulas
• Empirical Formula: Simplest whole-number ratio of atoms.
• Molecular Formula: Actual number of atoms in a molecule.
8. Heat Transfer (Calorimetry)
• Formula:
q = mcΔ T
where q is heat absorbed or released, m is mass, c is specific heat capacity, and Δ T is the change in temperature.
9. pH and pOH
• Formulas:
• pH:
pH = -log[H⁺]
• pOH:
pOH = -log[OH⁻]
10. Relationship between pH and pOH
• Formula:
pH + pOH = 14
11. Equilibrium Constant (Kc)
• Formula:
Kc = [C]ᶜ[D]ᵈ / [A]ᵃ[B]ᵇ
for the reaction aA + bB ⇌ cC + dD.
12. Rate Law
• General Form:
Rate = k[A]ᵐ[B]ⁿ
where k is the rate constant, and m and n are the orders of the reaction with respect to reactants A and B.
13. Half-Life
• First Order Reactions:
• Formula:
t(1/2) = 0.693 / k
https://t.me/quiz_time11
https://t.me/quiz_time11
Viidiyoo barnootaaf ⬇️ ⬇️
https://youtube.com/channel/UCLPTQfMXS6we7aTT4g9MwCw
📘አንድ የ12ኛ ክፍል ተማሪ ሊያውቃቸው የሚገቡ የ Chemistry ፎርሙላዎች
1. Molarity (Concentration)
• Formula:
M = n / V
where M is molarity (mol/L), n is the number of moles of solute, and V is the volume of solution in liters.
2. Dilution Equation
• Formula:
C₁V₁ = C₂V₂
where C is concentration and V is volume for two different solutions.
3. Ideal Gas Law
• Formula:
PV = nRT
where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin.
4. Gas Constant (R)
• Values:
• R = 0.0821 L ⋅ atm / (mol ⋅ K)
• R = 8.314 J / (mol ⋅ K)
5. Stoichiometry
• General Formula:
moles of A × moles of B / moles of } = moles of B
6. Percent Composition
• Formula:
Percent Composition = (( mass of element / molar mass of compoun} )) × 100
7. Empirical and Molecular Formulas
• Empirical Formula: Simplest whole-number ratio of atoms.
• Molecular Formula: Actual number of atoms in a molecule.
8. Heat Transfer (Calorimetry)
• Formula:
q = mcΔ T
where q is heat absorbed or released, m is mass, c is specific heat capacity, and Δ T is the change in temperature.
9. pH and pOH
• Formulas:
• pH:
pH = -log[H⁺]
• pOH:
pOH = -log[OH⁻]
10. Relationship between pH and pOH
• Formula:
pH + pOH = 14
11. Equilibrium Constant (Kc)
• Formula:
Kc = [C]ᶜ[D]ᵈ / [A]ᵃ[B]ᵇ
for the reaction aA + bB ⇌ cC + dD.
12. Rate Law
• General Form:
Rate = k[A]ᵐ[B]ⁿ
where k is the rate constant, and m and n are the orders of the reaction with respect to reactants A and B.
13. Half-Life
• First Order Reactions:
• Formula:
t(1/2) = 0.693 / k
https://t.me/quiz_time11
https://t.me/quiz_time11
Viidiyoo barnootaaf ⬇️ ⬇️
https://youtube.com/channel/UCLPTQfMXS6we7aTT4g9MwCw