A liquid is heated until boils. which result shows that the the test tube is pure water?
A. Condensation forms at the top of the test tube
B. Steam is produced
C. The thermometer reads 100
There is nothing behind in the test-tube

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Which elements are found in glucose, the product of photosynthesis? a. carbon, hydrogen, and oxygen b. carbon and hydrogen c. carbon, nitrogen, and oxygen d. hydrogen, nitrogen, and carbon