All of the questions here are pertaining to the colligative properties of a solution and the preparation of solutions. Maybe, it would be best if you understand the equations to be used in order to answer these questions.<span>
Freezing point depression or Boiling point elevation:
</span><span>ΔT = -K (m) (i)
</span>ΔT is the change in the freezing point or the boiling point not the freezing point/boiling point. Therefore, it should be added to the original value of the property of the solvent.
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K is a constant called the molal freezing point depression constant and for the boiling point is the boiling point elevation constant. It is a property of the solvent.
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m is the concentration of the solute in the solvent in terms of molality or kg solute/kg solvent.
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i is the vant hoff factor which will represent the number of ions which the solute dissociates when in solution.</span>
It's a chemical change because it's changing the object's property.
Answer:
devices that move a robot's joints
Explanation:
Answer:
The molecular formula of mono sodium glutamate is
Explanation:
Molar mass of sodium glutamate,M = 169 g/mol
let the molecular formula be
Percentage of carbon in the M.S.G. =35.52 %
a = 5
Percentage of Hydrogen in the M.S.G. = 4.77 %
b = 8
Percentage of oxygen in the M.S.G. =37.85 %
c = 3.99 ≈ 4
Percentage of nitrogen in the M.S.G. = 8.29 %
d = 1
Percentage of sodium in the M.S.G. =13.60 %
e = 0.99 ≈ 1
The molecular formula be :
Of course, at STP, dioxygen is a gas, but 10.0 g is still 10.0 g. We could calculate its volume at STP, which is 22.4 L × its molar quantity, approx. 8⋅L . There are 1.51×1023molecules O2 in 10.0 g O2 .