The mass of a sample is measured as 23.647 g. If the instrument used has a precision of 0.01 g, what is the correctly rounded mass?

What is 15.48 rounded to one decimal place?

The value of Avogadro's number is $6.02214076 imes 10^{23}$ $mol^{-1}$. A student experimentally determines Avogadro's number to be $6.022141 imes 10^{23}$ $mol^{-1}$. When reporting this value with the correct number of significant figures reflecting the precision of the experimental result, the student should report:

The mass of an electron is approximately $9.1093837 imes 10^{-31}$ kg. If this value is multiplied by the speed of light squared ($c^2 = (2.99792458 imes 10^8 m/s)^2$), what is the correct representation of the resulting energy in joules, considering significant figures?

A chemist measures the volume of a solution as 25.34 mL using a burette with a precision of ±0.02 mL. They then dilute this solution to a final volume of 250.0 mL using a volumetric flask with a precision of ±0.1 mL. What is the absolute uncertainty in the final concentration of the diluted solution?

Taking into account of the significant figures, what is the value of ${\rm{9}}{\rm{.99}}\,\,{\rm{m -- 0}}{\rm{.0099}}\,\,{\rm{m}}$ ?

The length, breadth and thickness of a metal block is given by $l = 90 cm$, b=8 cm, t=2.45 cm. The volume of the block is

What is the area of a disc of radius 1.1 cm?

If the value of the resistance is 10.845Ω and the value of the current is 3.23 A, then the potential difference is 35.02935 V. its value in correct significant figures would be

What is the result of $99.9 + 0.099$ when considering significant figures?

Taking significant figures into account, calculate the sum of $19.98$ and $0.0199$.