The table shows five items that a person may consider including in a safety contract. item number item 1 label all containers. 2 tie long hair back. 3 bring a cell phone to the lab in case of emergency. 4 bring a small laptop computer to the lab to use msds online. 5 wear safety goggles at all times. which three of the five items would be best to include in a safety contract? 1, 2, and 3 1, 2, and 5 2, 3, and 4 3, 4, and 5

The correct answer is B.

Answer : The correct option are, 1, 2, and 5

Explanation :

As we know that there are many safety rules when we are working in the chemistry laboratory. The safety rules are most important for us. Always follow these safety rules during the experiment.

The safety rules are :

Label all the containers. The long hair must be tied back to avoid catching fire.Wear safety goggles at all times for the protection of the eyes.Always wearing the safety gloves during the experiment.Always wearing the lab-coat during the experiment.

Hence, the correct option are, 1, 2, and 5

b

Explanation:

reverse the first reaction

multiply the second by 5

multiply the third by 3

3244.8-1967.5-1450.5=-173.2