25.0 mL of 0.150 M CaCl2 is added to 25.0 mL of 0.250 M Ni(NO3)2. Calculate the concentration of each ion (Ca2+, Cl-, Ni2+, NO3-) after mixing. Assume volumes are additive and no chemical reaction takes place.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

8. what happens to matter during a chemical reaction

Given the data below for the reaction, 2 a + 2 b + 4 c => d + e + 3 f, the reaction is fill in the [ ] order in a, fill in the [ ] order in b, fill in the [ ] order in c and fill in the [ ] order overall. (use the words "first, second, third, fourth" to fill each blank)experimentinitial conc of a, mol/l initial conc of b, mol/l initial conc of c, mol/l initial rate, mol/l.s1 0.1 0.1 0.2 2 x 10-32 0.2 0.3 0.2 6 x 10-33 0.3 0.1 0.2 2 x 10-34 0.4 0.3 0.4 1.2 x 10-2