How would you solve the following geometry problem? : ∆pqr, find the measure of ∡p. in triangle pqr where angle q is a right angle. qr measures 33 point 8; pq measures 57 point 6; measure of angle p is unknown. answers: 30.4° 35.9° 54.1° 59.6° what i did: equation: tan(x) = 33.8/57.6 tan(x)=0.56 but i know that isn't correct.

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

24

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