Earth’s fresh water can be found in bodies of water that provide people with drinking water and recreational sites. rivers, lakes, streams, and wetlands. These also play a role in maintaining a healthy ecosystem. You explored these valuable systems and their importance in the world in lesson 2.14, however do you recall where MOST of the fresh water is located?

Question 1 options:

The Red Sea between Africa and Asia

frozen in glaciers and ice caps

South America's Amazon River

The Great Lakes between the United States and Canada

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

lab safety rules

explanation: