When yeast is added to bread dough, it produces carbon dioxide. the pressure of the gas causes the dough to expand. explain how the rising of dough is an example of both a physical and a chemical change.

A KNO3 solution is made using 84.4 g of KNO3 and diluting to a total solution volume of 1.50 L. Calculate the mass percent of the solution. (Assume a density of 1.05 g/mL for the solution.)

Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does not contain an error. A) n=2, l=2, ml=+1 B) n=3, l=2, ml=-3 C) n=4, l=3, ml = - 2 D) n=2, l=2, ml=0 E) n=4, l=2, ml=+4

What is the number of moles of 7L of gas at 10 atm and held at a temperature of 298K?

Identify the catalyst-containing systems below as homogeneous or heterogeneous. Catalysts (4 items) (Drag and drop into the appropriate area below) NO (g) for the oxidation of SO2 (g) to SO3 (g) KI (aq) for the decomposition of H2O2 (aq) H2 (g)

The atoms or molecules in solids have no motion. true or false

How many moles are in 10 grams of CaCl2?

Which is the correct formula for phosphorus pentachloride? PCl4 because a subscript of 4 indicates four Cl atoms PCl5 because a subscript of 5 indicates five Cl atoms P5Cl because a subscript of 5 indicates five P atoms P5Cl3 because a subscript of

Why are the elements in groups 3 to 12 often used to make dyes?

What is not needed for corrosion of metals? a. oxygen c. water b. ions d. sunlight

What force can move the oceans