The number 20 has two significant figures. In scientific notation, it would be written as 2.0 x 10^1, indicating that both digits are significant. Significant figures are the digits in a number that carry meaning contributing to its precision.
One.
0.0019
0.0548
Avagadro's number is the amount of molecules in a mole. This is 6.022x10^23 molecules. There will be 6.022x10^20 molecules in a millimole and 6.022x10^14 in a nanomole. Therefore, the difference between these is how many molecules there are in the difference. This gives you approx 6.021994x10^20 molecules. This is limited by the amount of significant figures for avagadros number that I know of.
0.0556
The number 20 can be expressed in significant figures depending on how precise you want it to be. If it is written as "20," it has one significant figure. If you want to indicate that both digits are significant, you can write it as "20." or "2.0 x 10^1," which shows two significant figures. The use of a decimal point or scientific notation clarifies the number of significant figures intended.
1 significant figure.
The answer depends on how many significant figures. To one sig fig it is 20.
There are 5 significant figures in this number.
It has two.
One.
19.75 to two significant figures is 20.
If your question was 'what is 216 to one significant figure', the answer would be 2. This is because the two means two hundred. If your number was 0.216 and you had to round it to one significant figure it would also be 2, but if your number is 0.203 and you had to round it to two significant figures you would say 20 this is because you only count the zeros as significant figures after an actual number. For example; 0.31 to two significant figures would be 31 but 0.301 to two significant figures would be 30.
It's 10, correct to two significant figures.
Integers ending in 0 are ambiguous. The answer is 1 or 2.
14.68 + 20
The number 20 million is expressed in figures as 20,000,000 - 2 followed by seven zeroes.