Molarity = number of moles of solute / liters of solution number of moles = molarity * liters of solution number of moles of Na2C2O4 = 0.1 * 0.25 = 0.025 moles
Now, from the periodic table: mass of Na = 22.9 grams mass of C = 12 grams mass of O = 16 grams molar mass of Na2C2O4 = 2(22.9) + 2(12) + 4(16) = 133.8 grams Therefore, one mole is equal to 133.8 grams. To know the mass of 0.025 moles, all you have to do is cross multiplication as follows: mass = (0.025*133.8) / 1 = 3.345 grams
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
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Charles's law (also known as the law of volumes) is an experimental gas law that describes how gases tend to expand when heated. A modern statement of Charles's law is: This relationship of direct proportion can be written as: V∝T
I believe the answer is D. loess. The loess soil is a predominantly silt-sized sediment formed by accumulation of wind blown dust. This soil is highly porous, homogeneous, pale yellow and friable. One way of forming loess is from glaciers and that is why they contain glacially ground flour like clay and silt.
