Skip to content
ScotSpark
Sign in
All Chemistry types
Higher ChemistrySource-linked · free

Calculations

Moles, masses and reaction quantities

Convert to amounts of substance and use the balanced-equation ratio.

One skill · 8 sittings · original source PDFs.

Open the PDF, work in your own notes, check its marking, then return to record your attempt. Grouping is provisional; PDF answers are not captured.

Loading your account progress…

Choose a source example.

17 linked pages in 2025. The different years are examples of this same skill family, not additional types.

  • 2025 · Paper 1 Multiple choice

    Official PDF

    PDF viewer page 2. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 1 Multiple choice (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 1 Multiple choice

    Official PDF

    PDF viewer page 4. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 1 Multiple choice (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 1 Multiple choice

    Official PDF

    PDF viewer page 7. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 1 Multiple choice (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 1 Multiple choice

    Official PDF

    PDF viewer page 10. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 1 Multiple choice (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 3. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 4. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 7. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 10. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 12. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 14. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 16. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 22. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 23. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 25. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 32. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 33. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

  • 2025 · Paper 2

    Official PDF

    PDF viewer page 34. Choose the question or subpart testing moles, masses and reaction quantities; an exact question number and mark total have not been source-checked yet.

    Open paper-page example (PDF opens in a new tab)
    Check the published marking instructions

    Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.

    2025 marking · Paper 2 (PDF opens in a new tab)
    Return here to record your attempt

    Attempt the question in your own notes, check the published marking, then record completion here. These are your own marks, not a verified result. Leave your marks empty to record completion only; if you enter a mark, include its total.

    Use the label in the PDF, not its viewer page number.

    Resolve the account loading or saving message above before changing this record.

View this course’s practice progress
My Higher Chemistry source-practice history

0 completed examples. Self-recorded completion and optional marks—not verified grades or original-question scores.

Record a question-type example to see it here. Answers written in external PDFs are not captured.

Response forms & source limitations

Forms describe wording on the linked pages, not separate type counts. A page can contain several subparts. PDF viewer pages may differ from printed page numbers; use the whole question and any inserts. Exact question and marking locations are shown only when source-checked.

AnalysisCalculationsComparisonsConstruction or completionDescriptionsExplanationsIdentificationMultiple choice

ScotSpark hosts no copies of the papers or marking instructions. Historical archive copies are third-party resources. Source access does not grant permission to republish copyrighted material, and no independent subject-review sign-off is recorded for these groupings.