3 points 2. The mass of a rock you find on Bradshaw Road has a mass of 16 grams
and a volume of 8 cm. What is the rock's density? (d = m/v) *
2.0 g/cm
0.5 g/cm
1.0 g/cm
128.0 g/cm

2.0g/cm

Explanation:

d=m/V

d=16/8

d=2g/cm

give me abc and i will get it for u.

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