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)

How many moles of sodium metal are needed to make 3.6 moles of sodium chloride? Given the reaction: 2Na + Cl2 → 2NaCl

NH4Cl and Na2CO3 Balanced Equation Total Ionic Equation Net Ionic Equation

Which of the following statements is not true about the decomposition of a simple binary compound? a) The products are the constituent elements. b) The reactant is a single substance. c) The reactant could be an ionic or a molecular compound.

Which process is a chemical change? (1) melting of ice (2) boiling of water (3) subliming of ice (4) decomposing of water

An ideal gas in a 1.25-gallon container is at a temperature of 125 degrees Celsius and pressure of 2.5 atmospheres. If the gas is oxygen (formula:O2 molecular weight = 32 grams per mole), what is the mass of gas in the container in units of grams?

Draw the organic product of the following nucleophilic reaction

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.

A student asked to convert measurements from liters to mililiters and from mililiters to liters. His answers are shown in bold in the choices shown below. On which choice did he make a mistake?

Donald is making a model of a nitrogen atom. The box for nitrogen in the periodic table is shown. To represent a neutral atom, which of these must Donald include in his model?

What are the charges and relative masses of the 3 main subatomic particles