How many moles of helium are needed to fill a balloon to a volume of 5.8 L at 30 °C and 262 mmHg?

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

What is the polyatamic ion of thiosulfate