There would be five. The only time you do not count figures as significant is if they are zeroes behind a decimal, but before any other figure.
Ex/
0.000501 only has three significant figures, while 1.000501 has seven.
1 mole H2O = 18.02g --- water is H2O ... 2 x 1.008 + 1 x 15.996 = 18.012 g/mole = 18.01 grams
Grams isn't a measurement of length; it is a measurement of weight.
The formula unit for magnesium fluoride is MgF2. From the periodic table, add the atomic weight of 1 magnesium atom and 2 fluorine atoms to get to get 62.3018. This means that 1 mole of MgF2 is 62.3018g of MgF2. Now, to find out the mass of 4.78 mol MgF2 X the g/mol so that you will cancel the moles, and keep the grams. 4.78 mol MgF2 X 62.3018g MgF2/1mol MgF2 = 297g MgF2 *The answer 297 is in keeping with significant figures. When you multiply or divide, the answer can have no more than the fewest significant figures in the calculation, which was 4.78, and which has only three significant figures.
It is 0.0063 kilograms: a kg being the standard measurement unit for mass.
40 grams is a unit of measurement for mass or weight. It is equivalent to roughly 1.41 ounces in the imperial system.
302.05 grams
5
302.05 grams
There are 4 significant figures in this problem.
4 of them.
five. 30.002
10.1+25.01+5.08
The significant figures are the ones which convey meaningful information about the measurement beyond the magnitude. Saying that a sample weighs .0000039 grams is better stated as 3.9 x 10^-6 grams or perhaps 3.9 micrograms. That's two significant figures. All the zeroes are not significant.
I would use grams because grams would give you more significant figures for the measurement than kilograms
The rule when rounding off numbers is "If the first figure to be discarded is 5 or more then the previous figure is increased by 1". When 16490 is rounded off to 2 significant figures then the first figure to be discarded is 4. As this is less than 5 then the previous figure (6) is not increased by 1. 16490 to 2 significant figures is 16000.
5 significant figures.
Rounded to two significant figures, 7.42 grams is approximately equal to 7.4 grams.