which substance is a base?\nhcooh\nrboh\nh₂co₃\nnano₃

which substance is a base?\nhcooh\nrboh\nh₂co₃\nnano₃

which substance is a base?\nhcooh\nrboh\nh₂co₃\nnano₃

Answer

Answer:

B. RbOH

Explanation:

Step1: Recall base - definition

Bases are substances that release hydroxide ions ($OH^-$) in aqueous solution.

Step2: Analyze each option

$HCOOH$ is formic acid, an acid as it donates $H^+$ in solution.
$RbOH$ (rubidium hydroxide) dissociates as $RbOH\rightarrow Rb^+ + OH^-$, it is a base.
$H_2CO_3$ (carbonic acid) donates $H^+$ in solution, it is an acid.
$NaNO_3$ (sodium nitrate) is a salt formed from the reaction of a strong base ($NaOH$) and a strong acid ($HNO_3$), it does not release $OH^-$ and is not a base.