If an element is lustrous, brittle, and a semi-conductor, how would you classify it?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6