What is the mass percent of carbon in glucose, C6H1206?

What’s a special glass that most beakers are made of

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?