3. A student performed an experiment similar to the one in this module to determine the empirical formula of a compound containing chromium (Cr) and O. After heating 0.4550 g of pure Cr wire in an
excess of air, the sample was cooled and weighed. The mass of the compound formed was 0.8749 g.
The molar masses of Cr and O are 52.00 g mol- and 16.00 g mol-, respectively.

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

Classify this reaction: 2al+n2-> aln.

Enzymes affect the reactions in living cells by changing the