When a standard solution of $NaOH$ is left in air for a few hours:

When water is added to quick lime,the reaction is

$K_2CS_3$ is called potassium ...... .

Which of the following has the least mass?

$K_2CS_3$ can be called potassium:

Which of the following contain the same number of atoms?
$A$. $2 \text{ g}$ of $O_2$ gas
$B$. $4 \text{ g}$ of $SO_2$ gas
$C$. $1400 \text{ mL}$ of $O_2$ at $STP$
$D$. $0.05 \text{ L}$ of $He$ at $STP$
$E$. $0.0625 \text{ mol}$ of $H_2$ gas
Choose the correct answer from the options given below: