Which unit can be used to express solution concentration? 1) J/mol

2) L/mol

3) mol/L

4) mol/s

Sickle-cell anemia is associated with a mutation in the gene encoding the beta subunit of hemoglobin that results in a change from glutamic acid to valine at position 6. All other amino acids are identical to a normal hemoglobin molecule.

Suppose the amount of a certain radioactive substance in a sample decays from to over a period of days. Calculate the half life of the substance. Round your answer to significant digit.

describe how a physical property such as mass and texture, can change without causing a change in the substance

What type of reacton is this? Ca + 2H2O = Ca (OH) 2 + H2

1). How can the position of a particle be determined? A-by measuring its mass B-by determining its charge C-by analyzing its interactions with another particle D-by measuring its velocity 2).

A flask contains 0.83mol of neon gas at a temperature of 35°C. The pressure gauge indicates 0.37atm inside the flask. What is the volume of the neon gas?

Which one is a true statement about endothermic reactions? A. Energy is absorbed making it feel colder. B. The reaction container always feels hot. C. The reactants have less heat energy than the products. D.

In which pair of elements are the chemical properties of the elements most similar?

In a play, the rising action consists of the events that lead up to the a. last line in the scene. c. external conflict. b. climax. d. internal conflict.

Solution of Na2SO4 is A) acidic B) basic C neutral