Answer:
Explanation:
Your goal when trying to find a solution's molarity is to determine how many moles of solute you have in one liter of solution.
Notice that your solution has a volume of 100.0 mL. Since
∣∣ ∣∣¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯aa1 L=103mLaa∣∣−−−−−−−−−−−−−−−−
you can say that your solution has a volume that is equivalent to 110th of 1 L. Therefore, the number of moles that will be present in your sample will represent 110th of the number of moles present in 1 L of this solution.
So, use sucrose's molar mass to find the number of moles present in your sample
10.0g⋅1 mole sucrose342.34g=0.02921 moles sucrose
So, if this is how many moles you have in 100.0 mL of this solution, it follows that 1 L will contain
1L solution⋅103mL solution1L solution⋅0.02921 moles100mL solution=0.2921 moles
You get 0.2921 moles of sucrose, you solute, per liter of solution, which means that the solution's molarity will be
molarity=c=∣∣ ∣∣¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯aa0.292 mol L−1aa∣∣−−−−−−−−−−−−−−−−−
The answer is rounded to three sig figs.
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A because a primary source is defined as a first hand account of an event .
Answer:
Solvent
Explanation:
Many people use the solute to describe the solid being dissolved and the solvent to describe the thing doing the dissolving, but really solvent means the part of the solution with a greater amount/concentration.
For example, if you have 1 gram of salt in 10 liters of water, the water is the solvent.
Answer:
As we read from left to right across the periodic table atomic numbers are increased by one each of element.
Explanation:
As we move from left to right across the periodic table the atomic number is increased by one and the number of valance electron in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
Answer:
Physical Change
Explanation:
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