Considering the followingI. pure waterII. solution of C12H22O11 (m = 0.01) in waterIII. solution of NaCl (m = 0.01) in waterIV. solution of CaCl2 (m = 0.01) in water(a) Choose the one with the highest freezing point.1a. pure waterb. C12H22O11 solutionc. NaCl solutiond. CaCl2 solution(b) Choose the one with the lowest freezing point.2a. pure waterb. C12H22O11 solutionc. NaCl solutiond. CaCl2 solution(c) Choose the one with the highest boiling point.3a. pure waterb. C12H22O11 solutionc. NaCl solutiond. CaCl2 solution(d) Choose the one with the lowest boiling point.4a. pure waterb. C12H22O11 solutionc. NaCl solutiond. CaCl2 solution(e) Choose the one with the highest osmotic pressure.5a. pure waterb. C12H22O11 solutionc. NaCl solutiond. CaCl2 solution

the atomic mass is the bottom number on the element.

-steel jelly

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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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