18 Type the correct answer in the box.
A certain sample of a liquid has a mass of 42 grams and a volume of 35 centimeters? What is the density of the liquid?
The density of the liquid is
grams/centimeter

relative humidity is a measure of the amount of moisture in the air relative to the total amount of moisture the air can hold.

so d

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

it has both hydrogen and oxygen