As a star gives off energy in a thermonuclear reaction, the mass of the star

1.

decreases

2.

increases

3.

remains the same

Use the format of "if the. Because" when writing your hypothesis

Given the fictitious chemical equation below 2 cups of tea 1 tablespoon of dry tea + 2 cups of water What is the appropriate stoichiometric factor relating the two "reactants"? Calculate the Molar Ratios From Balanced Equations

Pyridine rings can also under electrophilic aromatic substitution. given 2-methoxypyridine below, draw the expected major product by adding in the new substitution.

Select all that apply. The rate law for the reaction 2NO (g) + CU (g) rightarrow 2NOCl (g) is given by R =

Chlorine forms from the reaction of hydrochloric acid with manganese (IV) oxide. The balanced equation is: Mn O 2 + 4HCl → MnC l 2 + C l 2 + 2 H 2 O Calculate the theoretical yield and the percent yield of chlorine if 86.0 g of Mn O 2 and 50.

Human muscle stores sugars in the form of

How much heat is needed to raise the temperature of 75 g of a substance by 15 C when the specific heat is 0.92 J/g-C?

A nitric acid solution flows at a constant rate of 5L/min into a large tank that initially held 200L of a 0.5% nitric acid solution. The solution inside the tank is kept well stirred and flows out of the tank at a rate of 10L/min.

How many molecules are in 237g (about a cup of water)

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?