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

English , i don't understand spanish.

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.   

H2so4 is the chemical compound of sulfuric acid.