A spring is stretched 55 cm from its testing position. If the spring's constant of proportionality is 15N / m, what is the spring potential energy? (Keep 3 significant figures)

Mercury (II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below. 2HgO 2Hg + O2 The molar mass of HgO is 216.59 g/mol. The molar mass of O2 is 32.00 g/mol.

What volume of concentrated nitric acid (15.0M) is requiredfor the preperation of 2.00 L of 0.001 M nitric acidsolution.

How many moles of oxygen gas are there in 6.02 x 10 the the 24th power?

What is the name of the element with the atomic number 79

What is the formula mass of (NH4) 2SO4

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.

The role gravity played in the formation of the sun?