- 3, 1, 5, 2, 4
- B, A, A, A, B
- B, A, B, A
- Experiment is to determine whether the hypothesis is correct. If not, alter the hypothesis and conduct additional experiments to test the new hypothesis. (It is
often an ongoing process for scientists.) Or similar answer.
- Safe, unsafe, safe, unsafe, unsafe (obstructs sight), safe, unsafe
- B, D, C, A
- 5x 10³
- 5.6 x 10⁻³
- 3.35 x 10⁻¹s
- 4.5 x 10-5 dL
- 3.5 x 10⁻³ km
- 6.7 x 10⁻¹ g
- 3 (the final zero is significant)
- 3 (the final zero is significant)
silver is metal 1, rhodium is metal 2, platinum is metal 3
- Chocolate chip cookie, anything with different sized parts or pieces
- Salt water, anything that has 2 or more parts evenly distributed and can be separated by physical means
- Magnetism (magnetism through distillation in any order, with the non-numbered as extra credit)
- Solid to liquid
- Liquid to solid
- Gas to liquid
- Solid to gas
- Melting and freezing point
- Mass is not created nor destroyed in a reaction (or similar answer)
- 0.4 g/cm³
- 128 g
- Less than 1 g/cm³ (extra credit)
- Greater than 1 g/cm³ (extra credit)1 g/cm³ (extra credit)
- Three of the following:
- All matter is composed of indivisible particles called atoms
- All atoms of an element are identical, atoms of different elements have
- Chemical reactions involve the combination of atoms, not the destruction
- When elements react to form compounds, they react in defined, whole number ratios.
- 3, 3, 4, 3
- 26, 26. 30, 26
- 6, 6, 8, 6
- 8, 8, 9, 8
- 7.5 x 10⁷m
- a. 1s² b. 1s²2s²2p³ c. 1s²2s²2p⁶3s²3p⁶4s²
- a. (↑↓)
b. (↑↓) (↑↓) (↑) (↑) (↑)
c. (↑↓) (↑↓) (↑↓) (↑↓) (↑↓) (↑↓) (↑↓) (↑↓)(↑↓) (↑↓)Extra credit:
a. may behave as a wave
b. may behave as a stream of particles (called photons or quanta)
Extra credit: The atomic radius decreases across because since the number of electrons increases, the stronger the attraction between protons and electrons, pulling the electrons closer to the nucleus, causing a smaller radius. It decreases down the table because there is an increase in energy levels, with electrons farther away from the nucleus.
- Ionic sodium carbonate
- Covalent diphosphorus pentoxide
- Covalent ammonia
- Ionic iron (II) sulfate
- Covalent silicon dioxide
- Ionic gallium chloride
- Ionic cobalt (II) bromide
- Covalent diboron tetrahydride
- Covalent carbon monoxide
- Covalent phosphorus
- Covalent N2O3
- Covalent N2
- Covalent CH4
- Ionic LiC2H3O2
- Covalent PF3
- Ionic V2O5
- Ionic Al(OH)3
- Ionic ZnS
- Covalent SiF4
- Ionic Ag3PO4
Days 81-83 (student submitted answers)
[Part 1 – Evidence]
- The unknown substance was discovered to be the anti-venom. The anti-venom
has a similar structure to that of Nelson’s allergy drug.
- 167.16 g/mol.
- 598.66 g/mol.
- Adding the weight of the anti-toxin and the compound C to the weight of the peanut
allergy drug, it equals the weight of the unknown substance found in Nelson’s
- The unknown substance in addition to Nelson’s peanut allergy drug cancelled out
the effects of the peanut allergy drug.
- Yes, Nelson did take his medication that day. However, the amount was lower than
- Yes. It showed how the compound C combines with the spider toxin.
- It is possible Joanna took the pills for Sam.
- They did not provide any important information.
- Yes, the peanuts and related products provided a way to cross reference with the
[Part 2 – Conclusions]
- Sam Mellon
- Sam was jealous of Nelson receiving all of the credit.
- Sam knew what would happen if Nelson had the anti-toxin in his bloodstream in
addition to the peanut allergy medication.
Video Lab Answers:
- Mass of test tube with baking soda: 19.46 g
- Mass of empty test tube: 19.21 g
- Mass of baking soda: 0.25 g
- Mass of test tube and sodium chloride: 19.39 g
- Mass of sodium chloride: 0.18 g
- ? mol NaHCO3 = 0.25 g NaHCO3
(1 mol NaHCO3 / 84.0 g NaHCO3) = 0.0030 mol NaHCO3
(Note – 84.0 g is the Molar Mass of NaHCO3)
- ? mol NaCl = 0.18 g NaCl (1 mol NaCl / 58.5 g NaCl) = 0.0031 mol NaCl
- 0.0030:0.0031 or 1:1
- NaHCO3 + HCl → NaCl + H2O + CO2 (no coefficients needed)
- “Although they should be the same, the experimental mole ration may be slightly different than the theoretical mole ration due to experimental error such as not allowing the test tube to be completely cooled when massing at the end or allowing some of the liquid to splatter out of the test tube when heating.” source
- b. The wick of the candle is curled at the top.
- d. M is greater than or equal to one but less than ten.
- a. water displacement
- b. 1000 mm = 1 m
- c. Use multiple conversion factors.
- c. balance
- c. The chair will burn.
- b. CO
- c. pizza
- c. compound
- b. D = m / v
- b. the protons and neutrons
- d. all of these
- c. 1s22s22p2
- b. indivisible
- b. mass
- c. gas
- b. 2
- c. Sc