How many grams of $NaOH$ will be required to prepare $250 \, mL$ of $0.1 \, M$ solution?

How many grams of $KMnO_4$ are required to prepare $1 \ L$ of a $1 \ N$ solution,if the compound is used as an oxidizing agent in an acidic medium (in $g$)?

$A$ $300 \ mL$ bottle of soft drink has $0.2 \ M$ $CO_2$ dissolved in it. Assuming $CO_2$ behaves as an ideal gas,the volume of the dissolved $CO_2$ at $STP$ is $...... \ mL$. (Nearest integer) Given: At $STP$,molar volume of an ideal gas is $22.7 \ L \ mol^{-1}$.

$10 \ mL$ of a gaseous hydrocarbon on combustion gives $40 \ mL$ of $CO_{2(g)}$ and $50 \ mL$ of water vapour. The total number of carbon and hydrogen atoms in the hydrocarbon is:

How many grams of ethanol are required in the reaction with $Na$ metal to produce $560 \ mL$ of dihydrogen gas at $STP$? (Molecular mass of ethanol = $46 \ g \ mol^{-1}$)

$250 \ mL$ of a sodium carbonate solution contains $2.65 \ g$ of $Na_2CO_3$. If $10 \ mL$ of this solution is diluted to $1 \ L$,what is the concentration of the resultant solution (in $M$)?