How many grams would be in a sample of Cu(SO4)2 containing 9.1 x 1024 Cu(SO4)2 particles?

Compare and contrast physical changes with chemical changes.

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

How many significant figures are in the following numbers ? a. 0.0002030 b. 2.000 c. 2.008900 d. 145.00