Question detail
In Gas volumes and amount of substance, which option best answers variant 5 of this quantitative chemistry objective: (chemistry only) (HT only) Substitute numerical values into equations using appropriate units. (MS 3c)?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Use of amount of substance in relation to volumes of gases (chemistry only) (HT only)
Question
- A. formula and unit: (chemistry only) (HT only) Substitute numerical values into equations using appropriate units. (MS 3c)
- B. wrong formula: uses a different Unit 4.3 relationship from Gas volumes and amount of substance
- C. wrong unit: gives a value without checking the required unit
- D. wrong reasoning: confuses coefficients, subscripts, mass, moles, or concentration
Answer
The correct option is formula and unit: (chemistry only) (HT only) Substitute numerical values into equations using appropriate units. (MS 3c).
Explanation
The correct option is formula and unit: (chemistry only) (HT only) Substitute numerical values into equations using appropriate units. (MS 3c). It is correct because it directly supports the approved learning objective to (chemistry only) (HT only) Substitute numerical values into equations using appropriate units. (MS 3c). This belongs to Gas volumes and amount of substance within Use of amount of substance in relation to volumes of gases (chemistry only) (HT only), so the answer must use the named Unit 4.3 relationship and avoid mixing it with nearby ideas such as mass, moles, concentration, yield, atom economy, gas volume, coefficients, or subscripts.
Common mistake
Incorrect Unit Usage
Students often forget to convert volumes from cm3 to dm3 when substituting values into gas volume equations.
Always check if the volume is in dm3; if it's in cm3, convert it by dividing by 1000 before substituting into the equation.
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