How many significant figures does 0.857610 have?

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

Which statement describes james chadwick’s discovery.

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate