Answer:
8.595 mol NO2
Explanation:
5.73 mol HNO3 * = 8.595 mol NO2
A student did an experiment with two identical plants, Plant 1 and Plant 2. About 10 mL fertilizer was added to both plants. Abo
ut 200 mL of water was added to Plant 1 every day. About 250 mL of water was added to Plant 2 once a week. The height of the plants was recorded over a period of 5 weeks in the table shown below.
Based on the table, which of these conclusions is correct?
A) Fertilizer helps plants grow taller.
B) A plant can survive without water for five days.
C) The plant which receives more water grows taller.
D) The growth of a plant is affected by the amount of light it receives.
(Does this question not make sense to anyone else? The plants were given the same amount of fertilizer and weren't deprived of water for five days. Also, the plant that received less water grew taller than the other. The only other option for the answer would be D, but light was not mentioned in the question. Help?)
Based on the table, which of these conclusions is correct?
A) Fertilizer helps plants grow taller.
B) A plant can survive without water for five days.
C) The plant which receives more water grows taller.
D) The growth of a plant is affected by the amount of light it receives.
(Does this question not make sense to anyone else? The plants were given the same amount of fertilizer and weren't deprived of water for five days. Also, the plant that received less water grew taller than the other. The only other option for the answer would be D, but light was not mentioned in the question. Help?)
2 answers:
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Answer: a. A solid melts:
b. a vapor is converted to solid:
c. a liquid freezes:
d. A solid sublimes:
e. a vapor condenses to liquid :
f. a liquid boils:
g. dissolving a tablespoon of salt in water:
h. combustion of gasoline:
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy change is negative and vice versa.
a. A solid melts: The solid is converting to liquid, thus the randomness is increasing as the molecules are moving away and the intermolecular forces are getting weaker. Thus the entropy change is positive.
b. a vapor is converted to solid: The gas is converting to solid, thus the randomness is decreasing as the molecules are moving close and the intermolecular forces are getting stronger Thus the entropy change is negative.
c. a liquid freezes: The liquid is converting to solid, thus the randomness is decreasing as the molecules are moving close and the intermolecular forces are getting stronger. Thus the entropy change is negative.
d. A solid sublimes: The solid is converting to gas, thus the randomness is increasing as the molecules are moving away and the intermolecular forces are getting weaker. Thus the entropy change is positive.
e. a vapor condenses to liquid : The gas is converting to liquid, thus the randomness is decreasing as the molecules are moving close and the intermolecular forces are getting stronger. Thus the entropy change is negative.
f. a liquid boils: The liquid is converting to gas, thus the randomness is increasing as the molecules are moving away and the intermolecular forces are getting weaker. Thus the entropy change is positive.
g. dissolving a tablespoon of salt in water: The solid is converting to ions , thus the randomness is increasing as the ions can move freely. Thus the entropy change is positive.
h. combustion of gasoline: The liquid is converting to gas, thus the randomness is increasing as the molecules are moving away and the intermolecular forces are getting weaker. Thus the entropy change is positive.