Which is closest to the maximum amount of copper that could be obtained from a mixture of ‘; according to the balanced equation below? Cu2O + C → 2Cu + CO

A. 5.0 moles B. 6.0 moles C. 9.0 molesD. 10.0 moles

Which is closest to the maximum amount of copper that could be obtained from a mixture of 5.0 moles of Cu2O and 6.0 moles of C according to the balanced equation below?

Cu2O + C → 2Cu + CO

A. 5.0 moles B. 6.0 moles C. 9.0 molesD. 10.0 moles

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol