Which free elements are found in the earths crust

Write a net ionic equation for the reaction that occurs when excess hydroiodic acid and chromium (II) carbonate (s) are combined. Include states and charges.

How many grams (m) of glucose are in 165 ml of a 5.50% (m/v) glucose solution? express your answer numerically in grams?

A compound containing only C, H, and O, was extracted from the bark of the sassafras tree. The combustion of 46.3 mg produced 126 mg of CO2 and 25.7 mg of H2O. The molar mass of the compound was 162 g/mol.

A chemistry student needs 65.0g of acetone for an experiment. She has available 250. g of a 12.5% w/w solution of acetone in chloroform. Calculate the mass of solution the student should use.

How many grams of KMnO are required to make 100 mL of a 1.2 M solution?

What does LeChatelier's principal mean

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.