Changing the pendulum design after the first trial was an example of to solve the problem presented by the teacher. A) designing the model B) evaluating th e model C) identifying the problem D) doing research on the problem

C. identifying the problem

Explanation:

To be sure of what the experiment involves one need to have an hypothesis to guide the task.

Assuming the hypothesis in the experiment is , “changing the amount of weight at the end of the pendulum will change the period of the pendulum.”

The experiment design would be complementary in that it would entail measuring the period with just one amount of weight, then changing the weight without changing any other variables, then measuring the period with the new amount of weight.

Changing the pendulum design after the first trial was an example of identifying the problem or the variable tied to the one factor that we are solving for.

answer; /// i do believe that the correct answer is (c)nuclear bond

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :