The definition of absorbance is A=log( I(0) / I), which is the logarithm (base 10) of the initial intensity of the light passed through the sample divided by the intensity of the light after it has passed through.
Let's look at a few values of A and see what these values imply.
If A = 0, then I(0) must equal I, which means the intensity doesn't change, which means no light is absorbed.
If A = 1, then I(0) / I must equal 10. This means that 90% of the light was absorbed.
If A=2, then I(0) / I must equal 100, and 99% of the light was absorbed.
If A=3, then I(0) / I must equal 1000, and 99.9% of the light was absorbed.
And so on.
dilute it
A pH value greater than 7 is an alkali.
In reference to the melting of DNA: as DNA melts (denatures from a double-stranded molecule to two single strands) the UV absorbance INCREASES. This absorbance increase is referred to as a "hyperchromic shift" or the hyperchromic effect. Thinking about this situation in reverse: the UV absorbance DECREASES as two DNA strands anneal to form double stranded DNA. This is referred to as the "hypochromic effect". (Please note, there is an answer on answers.com that incorrectly states the opposite, that absorbance decreases with melting. This is incorrect. Two single strands of DNA have higher absorbance than the double-stranded molecule.)
Yes. NaOh is a strong base so it would have a pH greater than 7 (likely up around 13-14).
If you mean greater than the pH of vinegar, then the answer is sodium hydroxide is a base, which means it will have a pH greater than 7, and vinegar is an acid, which means it will have a pH less than 7.
because that chart gives a more accurate value than the absorbance scale on the specthometor
dilute it
No.
A positive value is a value that is greater than zero. A negative value is a value that is less than zero.
Any number greater than 0 or it is positive.
5. It does not have a value greater than 12. Consequently, it does not have a value greater than 12 and less than 13.
In mathematics, when we comparing two values if any of the value has a larger value then the sign greater than is used for differentiating that the value is greater than the another value. > is the greater than sign, as in If x is greater than y,then x>y
That a certain value is greater than most of the values possible.
The same as it does for any other numerical value.
Here are two possibilities:"has not the same value as";"is less than or greater than".
greater as the absolute value of -3 is 3
Generally, when the median is greater than the mean it is because the distribution is skewed to the left. This results in outliers or values further below the median than above the median which results in a lower mean value than median value. When a distribution is skewed left, it is generally not very symmetrical or normally distributed.