0
How many significant figures are justified in a measurement of a length that is between 9 and 10 centimeters if the measuring device ruler has smallest divisions of 0.1 cm?
Wiki User
∙ 12y ago
You would need to record to the 0.1 cm, then estimate the next significant figure. So you should have a measurement to the 0.01 cm.
Wiki User
∙ 12y ago
Wiki User
∙ 6y agoTwo significant figures is enough.
Add your answer:
Earn +20 pts
How many atoms are there in a 0.250 mol sample of vanadium?
0.250 X Avogadro's Number = 1.51 X 1023, to the justified number of significant digits.
What is the mass of 2.47 moles of fluorine atoms?
The gram atomic mass of fluorine is 18.9984. Therefore, the mass of 2.47 moles is 2.47 times the gram atomic mass, or about 46.9 grams, to the justified number of significant digits.
How many atoms are in 1.4 g C?
(1.4/atomic mass of carbon) X Avogadro's number = 1.4/12.0 X 6.02 X 1023 = 7.0 X 1022 atoms, to the justified number of significant digits.
Does 1 gram sample of iron has a small number of atoms?
The number of atoms in 1 gram of iron is Avogadro's number multiplied by 1/55.845 = 1022, to the justified number of significant digits This is not a small number by most people's standards!
When you have 46 grams of sodium react with 160 grams of oxygen how many moles of sodium oxide are obtained?
The equation for the reaction is 4 Na + O2 -> 2 Na2O. This shows that, for complete reaction, one mole of oxygen is required for each four gram atomic masses of sodium. The gram atomic mass of sodium is 22.9898; therefore, 46 grams of sodium constitutes 2.00 moles of sodium, to more than the justified number of significant digits. The gram molecular mass of diatomic oxygen is 31.9988; therefore 160 grams of oxygen constitutes 5.000 moles of diatomic oxygen, to more than the justified number of significant digits. This is well over the minimum amount of oxygen required for complete reaction of all the sodium present. Each two gram atomic masses of sodium produces one gram formula mass of sodium oxide; therefore, the number of gram formula masses of sodium oxide produced is 1.00, to at least the justified number of significant digits.
What is 1.2 times 0.26?
0.31, to the justified number of significant digits.
Square Root of 157?
12.529964112.5, to the justified number of significant digits.
79.9 is 99 percent of what?
79.9/0.99 = 81, to the justified number of significant digits.
What is the reciprocal of 2.5400?
1 [exact]/2.5400 = 0.39370, to the justified number of significant digits.
Estimate for 5.07 times 0.81 please?
4.11, to the justified number of significant digits.
What is the percent of 7 divided by 195?
0.0359
What is the volume of the right circular cylinnder with a height of 12cm and a radius of 9cm?
A formula for the volume of a cylinder is 2 X pi X r2 X h, where r is the radius and h is the height. This formula yields about 3053.628059 cubic centimeters if the integers specified are considered exact or 3.1 X 103 cubic centimeters to the justified number of significant digits otherwise.
What percent is 2.58 of 58.45?
100(2.58/58.45) = 4.41 %, to the justified number of significant digits.
What is 2.9 percent of 250.00?
250.00 X 0.029 = 7.2, to the justified number of significant digits.
What does 8765 times 23 divided by 28 equal?
7200, to the justified number of significant digits.
What percent of 1048 equals 943?
100(943/1048) = 90.0 %, to the justified number of significant digits.
What is the answer to 144.00 x 1.5 percent?
144.00(1.5/100) = 2.2, to the justified number of significant digits.
