Balance the following equation. if the coefficient is one, put 1 in the blank.     [fish5]Mg +[fish6]Cr(NO3)3 –> [fish7]Mg(NO3)2 + [fish8]Cr

Convert the following numbers expressed in scientific notation to ordinary decimal numbers.   6.99723 x 105  [fish5]   2.333 x 102  [fish6]   3.775 x 10-3  [fish7]   5.1012 x 10-6  [fish8]

Coffee has a pH of 5 while water has a pH of 7. How much more acidic is the coffee than the water it is made from?

What is the difference between a strong acid and a weak acid?

An unknown liquid is poured into a graduated cylinder. Fifty milliliters of the fluid weighs 40 grams. What is the density of the liquid?

Write the formula for the conjugate base of each of the following:   NH4+  [ans5]   H2S  [ans6]   HNO2   [ans7]   HC2O4-  [ans8]

Convert the following ordinary decimal numbers to scientific notation. Note – you will not be able to enter superscripts so use brackets for the exponent. For example, 1.3 x 103 would be entered as 1.3 x 10^3   1,346.41  [fish1]   429,209  [fish2]   0.000002056  [fish3]   0.00488  [fish4]

Write the chemical formula for a compound made up of two phosphorous atoms and five oxygen atoms. Name the compound. Formula  [joe1] Name  [joe2] Is it an ionic or molecular compound?  [joe3]

Write the formula for the conjugate acid of each of the following: HC2O4-  [ans1]   SO32- [ans2]   BrO-  [ans3]   NH2-  [ans4]

For the following equation determine the oxidation number for each atom in the equation and identify whether the reaction is a redox reaction or not. If the reaction is redox, identify what is oxidized, what is reduced, the oxidizing agent, and the reducing agent. If it is not a redox reaction, put NA those answer blocks.   HCl + NH3 –> NH4Cl   Reactants Oxidation Numbers:   N        [fay1]   H         [fay2]   Cl        [fay3]   Product Oxidation Numbers   N         [fay4]   H         [fay5]   Cl        [fay6]   Is this a redox reaction?            [fay7]   If it is, what is element is oxidized?  [fay8]   What element is reduced?       [fay9]   What element is the oxidizing agent?     [fay10]   What is the reducing agent?       [fay11]