One isotope of nitrogen has 7 protons and 8 neutrons. Which is the correct reference for this isotope?

A.

nitrogen-15

B.

nitrogen-8

C.

nitrogen-7

D.

nitrogen-1

Give the structural formula of the compound with the condensed structural formula of CH3C (CH3) 2C (CH2CH3) 2CH2CH2CH2CH2CH3. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars.

How many water molecules are in a 0.369 g sample? answer in units of molecules?

1. What is energy measured in? 2. What should you consider when choosing which food you eat each day? 3. Name some energy stores

Describe the relationship between the radius of a cation and that of the atom from which it is formed. a. cations are much smaller than their corresponding parent b. cations are much larger than their corresponding parent c.

What is the correct formula name for calcium chloride? A. CaCl B. Ca2Cl C. CaCl2 D. ClCa2

How do you balance __Mg + __HCl - - > __MgCl2 + ___ H2

How many grams of methane, CH4 are produced from the complete reaction of 5.15 moles of carbon monoxide, CO

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?