Question

determine the moles of h3po4 in hundred grams of 87 % find the number of moles​

Answer 1

Molar mass:-

$\\ \sf\longmapsto H_3PO_4$

$\\ \sf\longmapsto 3(1u)+39u+3(16u)$

$\\ \sf\longmapsto 3u+39u+48u$

$\\ \sf\longmapsto 90u$

$\\ \sf\longmapsto 90g/mol$

Now

$\boxed{\sf No.\;of\:moles=\dfrac{Given\:mass}{Molar\;mass}}$

$\\ \sf\longmapsto No\:of\:moles=\dfrac{100g}{90g/mol}$

$\\ \sf\longmapsto No\: of\:moles=1.1mol$