Answer:
Aspirin was purified in the lab by recrystallizing the crude aspirin. The melting point of the purified aspirin is expected to be lower than the melting point of crude aspirin.
Explanation:
The presence of impurities in a sample lowers the melting point of the impure substance. Hence the melting point of an impure substance is always less than the melting point of the corresponding pure substance.
Bearing this in mind, the statement "Aspirin was purified in the lab by recrystallizing the crude aspirin. The melting point of the purified aspirin is expected to be lower than the melting point of crude aspirin." is found to be false since impure substances tend to have a slightly lower melting point than the pure substance, and a broader melting temperature range.
1 mole is equal to the atomic mass of the element/compound in grams
Explanation:
Density = 1.60 g/mL
Initial Temperature T1 = 218.0°C + 273 = 491 K (Upon converting to kelvin temperature)
Final Temperature T2 = 750.0°C + 273 = 1023 K (Upon converting to kelvin temperature)
Mass of gas = 1.00 lb = 453.592 g (Upon converting to g)
Final Volume V2 = ?
Initial volume can be obtained from;
Density = Mass / Volume
Volume = Mass / Density
Volume = 453.592 / 1.60 = 283.495 ml
Initial Volume V1 = 283.495 ml
Using charles law;
V1 / T1 = V2 / T2
V2 = V1 * T2 / T1
V2 = 283.495 * 1023 / 491
V2 = 590.66 ml
Answer: The components of a pure substance are single elements or compounds instead of a mixture of compounds.
Explanation: Pure substance consits of a pure type of particle.
All elements and compounds that are considered as pure will have fixed boiling point and melting point.
Answer:
I will pick fusion over fission.
Explanation:
Fission and Fusion are nuclear processes in which atoms are altered to create energy.
By definition, fission is simply the division of one atom into two atoms while fusion is simply the combination of two lighter atoms to produce a bigger atom.
I will pick fusion over fission for the following reasons;
- Fusion reactions produces far greater amounts of energy than fission reactions normally produce.
- Fusion does not produce radioactive, toxic waste products that can damage the environment we live whereas fission does so.
