Question 10 of 10 How many carbon (C) atoms are in a molecule of CH 0?
O A. 3
O B. 2
C. 1
O D. 4

the atomic mass is the bottom number on the element.

-steel jelly

a electronegativity decreases beacuse the size of nucleus is bigger.

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

b.false that your answer