A student calculates the volume of a sphere to be $4.1887902047863905 imes 10^3 cm^3$. If the radius measurement used in the calculation has only two significant figures, what is the correctly rounded volume?

What is 15.48 rounded to one decimal place?

A student performs a titration and calculates the concentration of a solution to be $0.1234567$ M. The burette used has a precision of $\pm 0.02$ mL, and the volumetric flask used to prepare the solution has a precision of $\pm 0.1$ mL. Which is the most accurate way to report the concentration, considering significant figures and uncertainty?

A student has measured the length of a wire equal to 0.04580 m. This value of length has the number of significant figures equal to

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:

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?

A current of 2..34 A flows in a resistance of 11.111111${\rm{\Omega }}$. The potential difference across the given resistance with due regard for significant figure is

The respective number of significant figures for the numbers 23.023, 0.0003 and $2.1 imes {10^{ - 3}}$ are

If $L = 2.331\;cm,\;B = 2.1\;cm,$ then L+B=

The length, breadth and thickness of a block are given by $l = 12cm,\;b = 6\;cm\;$ and $\;t = 2.45cm$ The volume of block according to the idea of significant figures should be

If $x = 4.99$ and $y = 0.0099$, what is $x + y$ to the correct number of significant figures?