Polar molecules are molecules wherein the atoms do not share an electron equally in a bond especially a covalent bond. Due to this unequal sharing of the electrons, a dipole would form where a part would have a partial positive charge and the other end would have a partial negative charge. Having both the partial positive and the negative charges, the molecules of the substance would have a tendency to hold each other. As a result, polar molecules would exist at room temperature as liquids or solids rather than existing as gas. Examples are water, sugar, ethanol and hydrochloric acid.
Different colors of sedimentary rock are determined by the environment where they are located. For example, red rocks form where oxygen is present. Darker sediments form when the environment is oxygen poor.
So, basically, the weather and surroundings of the rock, so B.
Why do molecules combined into chains?
Explanation:
Using Beer-Lambert's law :
Formula used :
where,
A = absorbance of solution
c = concentration of solution
l = length of the cell
= molar absorptivity of this solution
According to question:
A = (C) : absorbance measured by the spectrometer
c = (B) : concentration, in mol/L, of the stock solution from which the sample was made
l = (A): pathlength of light through the cell
ε = (D) : molar absorptivity, a constant unique to that substance at that wavelength
Answer:
33.8 g Solution
Explanation:
A chemistry student needs 15.0 g of methanol for an experiment. The concentration of ethanol in the solution is 44.4% w/w, that is, there are 44.4 g of methanol every 100 g of solution. The mass of solution that would contain 15.0 g of methanol is:
15.0 g Methanol × 100 g Solution/44.4 g Methanol = 33.8 g Solution
Since 33.8 g are required and 320. g are available, there is enough solution for the requirements.
