Multiple states of matter - mixture
Same state of matter - pure
Separated physically- mixture
Consistent properties - pure
Can’t be separated- pure
Can’t be a single element - mixture
Answer:
Endothermic.
Explanation:
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In this case, it is necessary to keep in mind that exothermic processes are characterized by the release of energy and the endothermic processes by the absorption of heat. In such a way, every process from solid to liquid or gas is endothermic as they require energy to separate the molecules and therefore turn out in the phase change. On the other hand, every process from gas to liquid or solid is exothermic as heat is released to rejoin the molecules and produce the phase change.
Therefore, since solid water molecules tend to be well-arranged, it is necessary to add heat to the system to produce the phase change until gas; in such a way, this process is endothermic as energy must be absorbed by the ice.
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Answer:
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.2x350mg = 70mg which converts to .070g.
.35g/.070g = 5 tablets.
Molarity is defined as the number of moles of solute in 1 L of the solution.
Since the mass of the solute has been given we have to obtain the number of moles of solute
Number of moles = mass / molar mass
So we need to convert the mass to number of moles by dividing the mass by its molar mass.
The volume of the solution needs to be given in L but it has been measured in ml. Therefore volume in mL should be converted to L.
The molarity is found by dividing the number of moles by volume of solution in L
Answer is C)
