NaCl+CaCl=Na2S+CaCl2 is an impossible reaction.
Because PE is proportional to the height of where the mass is, and the top of the swing is the highest the mass of the 'bob' ever gets.
Answer:
c
Explanation:
sorry if im wrong my apolgies but i think c cus thats the only one that says equal amounts of something
like to test a drop of each so its balanced
1 CH4 (g) + 2 O2 (g) -----> CO2 (g) + 2H2O(l) ΔH= - 890 kJ
1 mol 2 mol
1) If ΔH has minus, it means "release". We need only "release" choices.<span>
2) From reaction
1 mol </span>CH4 (g) "releases" ΔH= - 890 kJ - We do not have this choice.
2 mol O2 (g) "release" ΔH= - 890 kJ, so
1 mol O2 (g) "release" ΔH= - 445 kJ
Correct answer is B.