Question 5 (1 point) What are some ways individuals can reduce the amount of carbon they contribute to the atmosphere (select all that apply): Question 5 options: Ride a bike or walk instead of drive Drive cars more Turn off lights in the home when not in use Use public transportation

that tool would be a compass

the answer would be a

the maximum mass of nh3 is nh3 in grams

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