The objects below represent solids that have equal masses and equal volumes. A
(D) cylinder
A) ball
B) cube (C) pyramid
22. Which object has the greatest density?
AA
B) B
CC
D) D
E) They are all the same.

idk

explanation:

the answer is the first option

explanation:

just googled it m8. not that hard

lol

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