Examine the false statement. in the bohr model of an atom, an electron's path is not known exactly. which answer choice rewords the false statement so it is true?
a. in the bohr model of an atom, an electron's path follows a defined orbit inside the nucleus.
b. in the bohr model of an atom, an electron's path follows a defined orbit around the nucleus.
c. in the bohr model of an atom, an electron's path follows an erratic pattern inside the nucleus.
d. in the bohr model of an atom, an electron's path follows an erratic pattern around the nucleus.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

i think its 100.

hope this !

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