Question

Calculate the molar mass of $Mn{O}_2$

Answer 1

Hint: The molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles. It is the mass of $1$ mole of the substance or $6.022\times {10}^{23}$ particles, expressed in grams.

Complete answer:
To calculate the molar mass for $Mn{O}_2$we must follow the following steps:
$-$ Use the chemical formula to determine the number of each type of atom present in the compound.
$-$Multiply the atomic weight of each element by the number of atoms of that element present in the compound.
$-$Add it all together and put units of $grammo{l}^{-1}$ after the number.
 The equivalent weight of $Mn{O}_2$ is the same as its molecular weight. The molar mass and molecular weight of $Mn{O}_2$ is $86.937$.

Additional information:
Manganese dioxide is the inorganic compound with the formula $Mn{O}_2$. This blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese and a component of manganese nodules. The principal use for $Mn{O}_2$ is for dry cell batteries, such as the alkaline battery and the zinc carbon battery. $Mn{O}_2$is also used as a pigment and as a precursor to other manganese compounds, such as $KMn{O}_4$

Note:
A specialized use of manganese dioxide is as an oxidant in organic synthesis. The effectiveness of the reagent depends on the method of preparation, a problem that is typical for other heterogeneous reagents where surface area, among other variables, is a significant factor.