Chris is about to do an experiment to measure the density of water at several temperatures. his teacher has him prepare and sign a safety contract before beginning the experiment. which item is most likely part of the safety contract? understand how to deal with water safely in the lab. bring an electronic copy of the msds on a personal laptop. do not discuss the experiment with other students in the lab. inspect the glassware for cracks or chips prior to beginning the lab.

Option (d) is the correct answer.

Explanation:

Safety contract is meant to ensure that the person conducting the experiment has understood all the terms and conditions for the experiment and if any accident occurs then no one else except the person himself should be responsible.

Therefore, it is necessary to check all the required apparatus carefully as there should not be any chips or breaks in them. As this may lead to spill of chemical or substance poured into it and this can be dangerous if someone deals with strong acids or hazardous chemical.

Thus, we can conclude that the item inspect the glassware for cracks or chips prior to beginning the lab, is most likely part of the safety contract.

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the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.