A team of engineers is designing a habitat for astronauts to live in on the Moon. Which statement describes a criterion of this project?
A. The habitat must be completed within 10 years.
B. The habitat must use fewer than 200,000 kg of materials.
C. The habitat must protect astronauts from harmful radiation.
O D. The habitat must cost less than $500 billion to build.
SUBMIT

h let me think

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

diaria maybe go see a doctor about that