If magnesium reacts with oxygen to form MgO, what is the balanced equation?
A) 2Mg + O₂ → 2MgO B) Mg + O₂ → MgO₂ C) Mg₂ + O₂ → MgO D) Mg […]
Basic Concepts of Chemistry, Chemistry
Basic Concepts of Chemistry
Basic Concepts of Chemistry, Chemistry
If theoretical yield is 10 g and actual yield is 8 g, what is percent yield?
A) 20% B) 125% C) 80% D) 800% Answer: C Explanation: Divide eight grams by ten grams and multiply by […]
Basic Concepts of Chemistry, Chemistry
In gravimetric analysis, what property should the collected precipitate have?
A) High volatility B) Low solubility C) Strong radioactivity D) High electrical conductivity Answer: B Explanation: A poorly soluble product […]
Basic Concepts of Chemistry, Chemistry
Using rounded atomic masses (Al=27, O=16), what is the molar mass of aluminium oxide (Al2O3)?
A) 102 g/mol B) 118 g/mol C) 86 g/mol D) 103 g/mol Answer: A Explanation: Molar mass is the sum […]
Basic Concepts of Chemistry, Chemistry
Using rounded atomic masses (C=12, H=1, N=14, O=16), what is the molar mass of urea (CH4N2O)?
A) 76 g/mol B) 44 g/mol C) 61 g/mol D) 60 g/mol Answer: D Explanation: Molar mass is the sum […]
Basic Concepts of Chemistry, Chemistry
Using rounded atomic masses (C=12, H=1, O=16), what is the molar mass of acetic acid (C2H4O2)?
A) 76 g/mol B) 44 g/mol C) 60 g/mol D) 61 g/mol Answer: C Explanation: Molar mass is the sum […]
Basic Concepts of Chemistry, Chemistry
Using rounded atomic masses (C=12, H=1, O=16), what is the molar mass of ethanol (C2H6O)?
A) 62 g/mol B) 30 g/mol C) 47 g/mol D) 46 g/mol Answer: D Explanation: Molar mass is the sum […]
Basic Concepts of Chemistry, Chemistry
Using rounded atomic masses (C=12, H=1, O=16), what is the molar mass of glucose (C6H12O6)?
A) 196 g/mol B) 180 g/mol C) 164 g/mol D) 181 g/mol Answer: B Explanation: Molar mass is the sum […]
Basic Concepts of Chemistry, Chemistry
Using rounded atomic masses (C=12, H=1, O=16), what is the molar mass of methanol (CH4O)?
A) 32 g/mol B) 48 g/mol C) 16 g/mol D) 33 g/mol Answer: A Explanation: Molar mass is the sum […]
Basic Concepts of Chemistry, Chemistry
Using rounded atomic masses (C=12, H=1, O=16), what is the molar mass of sucrose (C12H22O11)?
A) 342 g/mol B) 358 g/mol C) 326 g/mol D) 343 g/mol Answer: A Explanation: Molar mass is the sum […]