Concept explainers
Each of the following statements is true, but Dalton might have had trouble explaining some of them with his atomic theory. Give explanations for the following statements.
a. The space-filling models for ethyl alcohol and dimethyl
These two compounds have the same composition by mass (52% carbon, 13% hydrogen, and 35% oxygen), yet the two have different melting points, boiling points, and solubilities in water.
b. Burning wood leaves an ash that is only a small fraction of the mass of the original wood.
c. Atoms can be broken down into smaller particles.
d. One sample of lithium hydride is 87.4% lithium by mass, while another sample of lithium hydride is 74.9% lithium by mass. However, the two samples have the same chemical properties.
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Chapter 1 Solutions
Bundle: Chemistry: An Atoms First Approach, 2nd, Loose-Leaf + OWLv2, 4 terms (24 months) Printed Access Card
- 7:34 • < Question 18 of 22 5G 50% Submit What is the pH of a buffer made from 0.220 mol of HCNO (Ka = 3.5 × 10-4) and 0.410 mol of NaCNO in 2.0 L of solution? 1 2 3 ☑ 4 5 6 C 7 8 | 9 +/- 0 ×10 Tap here for additional resources ||| Гarrow_forward6:46 ✔ 5G 58% < Question 7 of 22 Submit What is the primary species in solution at the halfway point in a titration of NH3 with HBr? A NH3 and H+ B NH₁+ and H+ C NH4+ D NH3 and NH4+ Tap here for additional resources |||arrow_forward6:49 Dji < Question 15 of 22 4G 57% Submit The pOH of a solution is 10.50. What is the OH- concentration in the solution? A 3.2 × 10-4 M B C 3.2 x 10-11 M 10.50 M D 4.2 M E 3.50 M Tap here for additional resources |||arrow_forward
- ヨ 6:49 Dji < Question 13 of 22 5G 57% Submit The pH of a solution is 2.40. What is the H+ concentration in the solution? A B 2.5 x 10-12 M 4.0 × 10-3 M C 2.40 M D 4.76 M 11.60 M Tap here for additional resources |||arrow_forwardヨ C 6:48 Di✔ < Question 12 of 22 5G 57% Submit The pH of a solution is 12.50. What is the H+ concentration in the solution? A 0.032 M B 3.2 × 10-13 M 1.5 M D 9.25 M 12.50 M Tap here for additional resources |||arrow_forwardヨ C 6:48 Di✔ < Question 11 of 22 5G 57% Submit The pH of a solution is 1.50. What is the H+ concentration in the solution? A 0.032 M B 3.2 × 10-13 M 1.5 M D 2.15 M 12.50 M Tap here for additional resources |||arrow_forward
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