A block is found to have a volume of 35.3 cm^3. it's mass is 31.7 g. Calculate the density of the block.

Kobe is testing whether 100 g of substance A, 100 g of substance B, or 100 g of substance C produces more oxygen in a chemical reaction at 25°C. What is the independent variable? a) the nature of the substances. b) the masses of the substances.

What clues indicate that a rusty bike has gone through a chemical change

Using the equation N2+3H2-->2NH3 how many grams of NH3 is made if 11 grams of N2 are used?

Explain distillation and chromatography

Which is the first element to have 4d electrons in its electron configuration?

Complete each of the definitions with the appropriate phrase. Precision means that measurements are close to Accuracy means that measurements are close to Anawer Bank each other an accepted value |individual several

Acetylene is hydrogenated to form ethane. the feed to the reactor contains 1.4 mol h2/mol c2h2. (find properties of the reactants/products in appendix of book) a.

Several properties of the element magnesium are shown. Which one is a chemical property?

How does the quantity of atp produced as a result of activity by the electron transport chain compare to the quantity produced as a result of glycolysis?

Molybdenum has a molar mass of 95.94g/mol. How many molecules of molybdenum are in 150.0 g of molybdenum