Balance las ecuaciones por el método de oxido reducción recuerde Indicar Oxidante, reductor, agente oxidante, agente reductor

1. HI + H2SO4 → SO2 + I2 + H2O

2. SO2 + O2 + CaCO3 → CaSO4 + CO2

3. PbS + Cu2S + HNO3 → Pb(NO3)2 + Cu(NO3)2 + NO2 + S + H2O

4. H2O2 + KMnO4 + H2SO4 → K2SO4 + MnSO4 + O2 + H2O

What is the value of keq for the reaction expressed in scientific notation

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.