lung cancer kills about 3,000 people per day. If 90% of the deaths from lung cancer are attributed to smoking, what is the rate of people who die from smoking each day

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;

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