For a theoretical yield of 5.3 g and actual yield of 4.54766 g, calculate the percent yield for a
chemical reaction.
Answer in units of %.

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

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?