What is the difference between mass number and atomic mass?

An operator is a segment of dna that acts as an on off swicth for translation? true or false

Write the chemical reaction that is responsible for the ph of a buffer which contains nh3 and nh4cl. write the reaction in such a way that is appropriate for a ka.

The heat of combustion of butane, c4h10, is 2874 kj/mol. what is the heat of combustion of butane, in kj per gram? (provide the right sig. fig)

Which element is placed in the same period as ruthenium but has a higher atomic number than it? bismuth osmium silver zirconium

What organic compound is phosphorus found in?

Oxygen (O) will have chemical properties most like: sulfur (S). nitrogen (N). hydrogen (H). fluorine (F).

List the five major pollutants in the United States

What mass of MgCl2 was produced from 5.87 of Mg (OH) 2 reacting with 12.84 g of HCl? Identify the limiting and the excess reactants.

Use a Punnett square to predict the cross of a homozygous tall parent with a homozygous short parent, if tall is dominant over short. What will be the phenotype of the offspring described in this example. Select one: a. some tall some short b.

Write the mathematical expression that allows you to solve for the oh - concentration in water when you know only the h3o + concentration.