Which of the following chemical equations violates the law of conservation of mass?
a. ti + 2cl2 yields ticl4
b. 2c2h2 + 5o2 yields 4co2 + 2h2o
c. li2so4 + 2ca(no3)2 yields 2lino3 + 2caso4
d, mgso4 + 2naoh yields mg(oh)2 + na2so4

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?