12.5 mm = ? dam 0.05 km = ? hm 26 cm = ? dm $6 per square yard = $? per square foot 15 km = ? miles 2,450 g = ? pounds Helpful conversions: 1 kg = 2.2 pounds, 1 mile = 1.6 km

Jack’s orchard had 6 orange trees with a harvest of 450 lbs.  Jill’s orchard had 15 orange trees with a harvest of 1215 lbs.   a. What was Jack’s harvest yield per tree? b. What was Jill’s harvest yield per tree? c. Whose orchard had the highest yield per tree?

3/8 > 25%

Express 4/5 as a decimal Express 4/5 as a percentage Express 18% as a fraction in simplest form

37.44989 rounded to the nearest tenth is 37.5

0.0042 is expressed using scientific notation as 4.2 * 10^-3

According to Valence Bond theory the orbital hybridization pattern for Ni(CN)42– is

The following scenes (1, 2, and 3) represent solutions of magnesium (black) and fluoride (green) ions that are above solid magnesium fluoride MgF2. (The solid, other ions, and water are not shown) a. Which scene best represents the solution in equilibrium with the solid in water? b. In which, if any, other scene(s) will additional solid form? c. Once the equilibrium has established in all scenes if applicable, how will addition NaF (aq) affect the mass of solid present in any scene?    

Ammonia has a Kb of 1.8×10−5. Three ammonia/ammonium chloride (NH3/NH4Cl) buffer solutions, A, B, and C, were made using varying concentrations. What is the pH of each of the following three solutions?  Enter each of your answers to two decimal places.  A. NH3 ten times greater than NH4Cl, pH = B. NH4Cl ten times greater than NH3, pH = C. NH3 = NH4Cl, pH =  

Which one(s) of the following combinations (I to VI) that after being mixed can possibly create a buffer solution? Select ALL that apply.