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

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

Write the formula for the conjugate base of each of the following:   NH4+    H2S    HNO2      HC2O4- 

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    429,209    0.000002056    0.00488 

Write the formula for the conjugate acid of each of the following: HC2O4-    SO32-   BrO-    NH2- 

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

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          H           Cl          Product Oxidation Numbers   N           H           Cl          Is this a redox reaction?              If it is, what is element is oxidized?    What element is reduced?         What element is the oxidizing agent?        What is the reducing agent?       

Your instructor sends you into the chemistry stockroom to get a bottle as acid. What class of acid are you looking for?

Write the chemical formula for a compound made from the ammonium cation and the sulfate anion. Name the compound. Formula  Name  Is it an ionic or molecular compound? 

Assuming that the following numbers are not exact, how many significant figures does each number have?   9,875    102.405    10.000    0.00012