Well, one of the major importance sod hydrogen bonding is that it is necessary for forming and or creating double stranded DNA molecules, as the Nitrogenous bases extending from the nucleotides present in each strand are held together by hydrogen bonds.
Answer: The concentration of unknown sample is 1.8 mg/ml
Explanation:
According to the dilution law,
where,
= concentration of stock solution = ?
= volume of stock solution = 0.25 ml
= concentration of diluted solution = 0.45 mg/ml
= volume of diluted solution = (0.25+0.75) ml = 1.00 ml
Putting in the values we get:
Therefore, concentration of unknown sample is 1.8 mg/ml
If you imagined the line BCD as a line and ACE as a transversal, this would make angle ACB and DCE alternate interior angles. Since all three angles in a triangle, add up to 180 degrees, this means that the side lengths should be similar or congruent to accommodate the angle measure.