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NECTA ChemistryTanzania

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Question 261

How does increasing the temperature affect the rate of a chemical reaction?
Rates and equilibriumRates of Reactionmedium

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Question 262

Which statement correctly describes an equilibrium state in a chemical reaction?
Rates and equilibriumChemical Equilibriumhard

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Question 263

Which element has the electron configuration 1s2 2s2 2p6 3s1?
Atomic structureAtomic Structuremedium

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Question 264

What is the balanced chemical equation for the reaction of hydrochloric acid with sodium hydroxide?
Acids, bases, saltsAcids, Bases and Saltseasy

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Question 265

In the equilibrium reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g), what happens to the equilibrium if the pressure is increased?
Rates and equilibriumRates and equilibriumhard

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Question 266

Which statement correctly describes isotopes?
Atomic structureAtomic structuremedium

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Question 267

Calculate the number of moles in 44 g of carbon dioxide (CO₂). (Molar mass: C=12 g/mol, O=16 g/mol)
Mole conceptMole concepteasy

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Question 268

What type of organic compound is formed when an alcohol is oxidized under controlled conditions?
Organic chemistryOrganic chemistrymedium

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Question 269

In the equilibrium reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g), what happens if the pressure is increased?
Rates and equilibriumRates and equilibriumhard

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Question 270

Which statement about isotopes is TRUE?
Atomic structureAtomic structuremedium

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