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How many significant figures are in 0.040?
Two. There are rules of Significant figure is: RULE #1 - All digits 1 through 9 are significant. RULE #2 - Zero is significant when it is between two non-zero digits. RULE #3 - A terminal zero to the right of a decimal point in a number greater than one is significant. RULE #4 - A terminal zero to the right of a decimal point in a number less than one is significant. RULE #5 - A zero used to fix a decimal point in a number less than one is not significant. by Salim Reza
How many significant figures in 1.40?
In the number 1.40, there are three significant figures. The zero after the decimal point is considered significant because it helps specify the precision of the measurement. The rule is that all non-zero digits and any zeros between them are considered significant figures.
Why Walden's rule not applicable to small size cations?
Walden's rule states that ions of similar size have similar properties. However, for small cations, the high charge density can lead to significant interactions with surrounding molecules, causing deviations from Walden's rule. These interactions can affect properties such as solubility and reactivity, making the rule less applicable for small cations.
How does the 10 percent rule apply to the food chain?
The 10 percent rule in ecology states that only about 10% of energy is transferred from one trophic level to the next in a food chain. This is because energy is lost as heat during metabolic processes, limiting the amount of energy available for organisms at higher trophic levels. Consequently, this rule helps to explain why food chains are typically limited in length.
How many significant figures are in 9.090?
If the zeros are significant figures then 900 is correct to 3 significant figures. If rounding off has occurred then the answer could be 1 sf or 2sf. For example : If the original number was 903 and rounding off to the nearest ten was required then 900 is correct to 2 significant figures. If the number was 927 and rounding off to the nearest hundred was required then 900 is correct to 1 significant figure.
