atlas.BETA

Help / Feedback

atlas.

Everything from class,
without digging for it.

I built atlas to keep our notes, assignments, dates and study stuff in one place.

Designed & built by Jovan

Find the thing you’re looking for.

Mrs. Cote

Keep your assignment beside you. Write your working there.

atlas.Opening your question…

Whole assignment
textbookYour class material

Hebden uncertainty significant figures and density pp.23-29

Use this alongside Hebden uncertainty significant figures and density pp.23-29. Assigned references: Teacher notes: p.28 #42a–h, p.32 #48a,b; #49a; #50a,b; #51a,b,c; #52a,b; #55, p.39 #57a–f; #58a–d; #59a–d.

Teacher notes: p.28 #42a–h · p.32 #48a,b; #49a; #50a,b; #51a,b,c; #52a,b; #55 · p.39 #57a–f; #58a–d; #59a–d

Measurement and

Read all certain digits and one justified estimated digit. Attach an uncertainty based on the actual scale. Multiplication/division uses the limiting significant-figure count; addition/subtraction uses the limiting decimal place. Keep extra digits until the final answer.

Use the teacher-note references

The teacher notes specify p.28 #42, p.32 #48–55 with selected parts, and p.39 #57–59 with selected parts. The supplied textbook photos cover pp.23–29; use your class edition to resolve the page correspondence. Do not renumber another page’s exercise as the assigned one.

Teacher-note assignment

  1. 42

    Round the p.28 #42a–h values to the precision stated on the original.

    Walk through
  2. 48–55

    Complete the selected measurement parts on the teacher-note reference p.32.

    Walk through
  3. 57–59

    Complete the selected calculation parts on the teacher-note reference p.39.

    Walk through
Mark a section finished

This records your progress. It does not submit work to your teacher.

Original & sources

Captured class material is kept privately. The companion uses original explanations and references.

Atlas uses original explanations. For exact wording, tables and figures, keep your teacher’s handout or textbook beside it.

Chemistry student study guide & current class-note scopePrivate class evidence from Mrs. Cote · checked 2026-10-06

Original atlas explanations and practiceJovan Pahal / atlas · checked 2026-10-06

Explain this idea