Consider the following intermediate chemical equations. AH, = 74.6 kJ CH2(g)-> C(s)+ 2H2(g) CCl2(g) - C(s) + 2C1,(g) H2(g)+Cl,(g) → 2HCl(g) AH, = 95.7 kJ AH, --92.3kJ What is the enthalpy of the overall chemical reaction CH (9)+401,(g) → CCI(g) +4HCl(g)? -205.7 kJ -113.4 kJ O-14.3 kJ O 78.0 kJ​

What’s the percent by mass of carbon in c10h14n2

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.