Density is what type of property? select all that apply physical
chemical
extensive
intensive

C and D

Explanation:

For example, the ratio of an object's mass and volume, which are two extensive properties, its density, which is an intensive property.

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

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