The mass of the electron is 9.10939 x10-31Kg. Express the mass o9f the electr4on to 1, 2, 3, and 4 significant figures.
I will do three figs.
9.11E-31 kg
(E means x 10^ )
I will be happy to critique your thinking on the others.
To express the mass of an electron to a certain number of significant figures, you need to round the given value. Here's how you can do it:
1 significant figure:
Round the given mass of the electron, 9.10939 x 10^-31 kg, to one significant figure.
The first significant figure is 9; therefore, the mass of the electron to one significant figure is approximately 9 x 10^-31 kg.
2 significant figures:
Round the given mass of the electron, 9.10939 x 10^-31 kg, to two significant figures.
The first two significant figures are 9 and 1; therefore, the mass of the electron to two significant figures is approximately 9.1 x 10^-31 kg.
3 significant figures:
Round the given mass of the electron, 9.10939 x 10^-31 kg, to three significant figures.
The first three significant figures are 9, 1, and 0; therefore, the mass of the electron to three significant figures is approximately 9.11 x 10^-31 kg.
4 significant figures:
Round the given mass of the electron, 9.10939 x 10^-31 kg, to four significant figures.
The first four significant figures are 9, 1, 0, and 9; therefore, the mass of the electron to four significant figures is approximately 9.109 x 10^-31 kg.