How do you convert particles to moles, and mass to moles? 1) 77.56 g of CaCO3 to moles

2) 2.55 x 10^24 molecules of KCl to grams

3) 0.0931 mol of BaCl2 to grams

4) 1.55 x 10^22 molecules to moles

5) 0.664 moles of HF to molecules

6) 86 g of Fe(NO3)3 to moles

7) 7.88 x 10^23 molecules of CO2 to grams

8) 2.93 moles of MgF2 to grams

9) 7.56 g of MgCO3 to moles

10) 8.55 x 10^21 molecules of NaCl to grams

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5

Amechanical wave that transports a lot of energy will have a

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.