It is not always expressed in 2 sig figs. The number of sig figs depends on the accuracy of your measurements of mass and volume to calculate the density as well as any variables that you are expected to use the density with. There is no point in having a density expressed to 15 significant figures if then you are going to multiply it by volume expressed to 1 sig fig to determine the mass.
The atomic mass of Cu-63 should be expressed to two significant figures, which are 63.
There are four significant figures in 149.0. The trailing zero after the decimal point indicates that it is significant.
all the zeros are significant. there are four significant figures.
There are two significant figures in 0.00013.
19.75 to two significant figures is 20.
Because density expressed in two significant figures depends on your accuracy of your measurements of mass and volume to calculate as well as any variables that you are expected to use.
The atomic mass of Cu-63 should be expressed to two significant figures, which are 63.
It is: 62 kg
There are four significant figures in 149.0. The trailing zero after the decimal point indicates that it is significant.
The number 151.208, when expressed to two significant figures, is 150. This is because the first two significant figures are '1' and '5', and rounding the next digit (which is '1') leads to a decrease in the last significant figure. Therefore, the rounded value is 150.
There are 4 significant figures in 0.0032. Seems to be only 2 significant figures in this number.
460. (the period/decimal point is necessary; otherwise 460 would be considered two significant figures)
There are two significant figures which are the two 2s.
all the zeros are significant. there are four significant figures.
22.1 to two significant figures = 22
23.81558 to two significant figures is 24.
42 has two significant figures.