Question 111
What is the atomic number of an element that has 15 protons in its nucleus?Atomic structureAtomic structureeasy
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Question 112
How many moles of water (H₂O) are in 36 grams of water? (Molar mass of H₂O = 18 g/mol)Mole conceptMole concepteasy
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Question 113
Which of the following is a characteristic of a base according to the Arrhenius definition?Acids, bases, saltsAcids, bases, saltsmedium
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Question 114
If increasing the concentration of reactants speeds up a reaction, what does this indicate about the reaction rate?Rates and equilibriumRates and equilibriummedium
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Question 115
In a covalent bond, what determines the polarity of the bond?Chemical bondingChemical bondinghard
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Question 116
What is the pH of a solution with a hydrogen ion concentration [H⁺] of 1 x 10⁻³ M?Acids, bases, saltsAcids, bases, saltsmedium
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Question 117
For the reaction: N₂(g) + 3H₂(g) ⇌ 2NH₃(g), increasing pressure will favor which side of the equilibrium?Rates and equilibriumRates and equilibriumhard
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Question 118
Calculate the number of moles in 18 grams of water (H₂O). (Atomic masses: H=1, O=16)Mole conceptThe Mole Concept and Stoichiometryeasy
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Question 119
What is the functional group present in all alcohols?Organic chemistryOrganic Chemistrymedium
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Question 120
Which of the following statements is true for a system at chemical equilibrium?Rates and equilibriumChemical Equilibriumhard
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