Which statement is NOT true about matter? A. It has the same value everywhere on Earth.
B. It is independent of gravitational forces.
C. It becomes less in outer space, farther from Earth.
D. It is a constant measure of the amount of matter.
E. It is found in all matter.

pls help ill give thanks and brainliest

c. electrical charges of ionic bonds.

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