Which energy changes are associated with a liquid freezing?
Answers
Answer:
energy is released as potential energy decreases
Explanation:
EGD2020
Related Questions
Explain why a solution can have many solutes, but only one solvent.
Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the sugars can’t be separated by filtration. Under which category will you classify it?suspensioncolloidsolutioncompoundelement
A substance that is present in a reaction but not used up in the reaction is called a _____.
Given the balanced equation:4Fe(s) + 3O2(g) ==>2Fe2O3(s) + 1640 kJWhich phrase best describes this reaction?(1) endothermic with DH = +1640 kJ(2) endothermic with DH = -1640 kJ(3) exothermic with DH = +1640 kJ(4) exothermic with DH = -1640 kJ
Answers
(1) CuCO3(s) ==> CuO(s) + CO2(g)
(2) 2KClO3(s)==>2KCl(s) + 3O2(g)
(3) AgNO3(aq) + KCl(aq) ==>AgCl(s) + KNO3(aq)
(4) H2SO4(aq) + 2KOH(aq)==> K2SO4(aq) + 2H2O(l)
Answers
2KClO3(s)⇒2KCl(s) + 3O2(g)
K=2 K=2
Cl=2 Cl=2
O=6 O=6
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A suspension is a mixture containing solid particles that are large for sedimentation. We know that mud contains solid pieces of dirt that haven't been broken down. So, suspension = mud.
A solution is a mixture composed of two or more substances. We know that gasoline is made of petrol mixed with a variety of additives. So, solution = gasoline.
A colloid is a solution that has particles ranging between 1 and 1000 nanometers, yet are still able to remain evenly distributed throughout the solution. We know that blood is thin and isn't mixed with anything but our blood. So, colloid = blood.
Blood: colloid
Mud: Suspension
Gasoline: solution
The volume remains the same.
The amount of solvent increases.
The concentration increases.
Answers
Answers
This is because aluminium has a 3+ charge and nitrate has a 1- charge, so you need 3 of them to balance out aluminium.
Therefore, you have one ion of aluminium.
b. producing flowers
c. being a prokaryote
d. being an autotroph
Answers
The correct option is d. being an autotroph. All plants are multicellular eukaryotes that produce their food through the process of photosynthesis.
What are autotroph ?
Autotrophs are organisms that are capable of producing their own food using energy from the environment, such as sunlight or chemicals. They are also known as "producers" in ecosystems because they are able to synthesize organic molecules from simple inorganic substances.
Plants are one of the most well-known examples of autotrophs, as they use energy from sunlight to produce their own food through photosynthesis.
Not all plants produce flowers, as there are some plant groups that do not produce flowers such as ferns and mosses. Additionally, plants are not unicellular as they are made up of many cells. Finally, plants are not prokaryotes, as they have complex cells with a nucleus and other organelles.
Hence, option d is correct.
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