A. Oxygen. Oxygen has an atomic mass of 16. The atomic mass of an atom is the combined weight o the protons and neutrons. Since Oxygen's atomic mass is 16, it has 8 protons and 8 neutrons.
The law that regulates access to information about chemicals used in workplaces is called OSHA's Hazard Communication Standard.
<h3>What is the OSHA Hazard communication standard?</h3>
In a workplace, all employees should be introduced to dangers connected with exposure to hazardous chemicals. They should get a Material safety data sheet (MSDS) from the manufacturers about the chemicals. Employees can file a complaint in their local OSHA office if they think that their employer isn’t complying with the OSHA STANDARDS and for employees’ safety, the name of the complainant can be kept a secret. It is made for the safety of employees by enforcing some standards and rules.
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Answer:
Heat of solution= - 63KJ/mole
Heat evolved = - 18.82KJ
Explanation:Heat of solution = Heat of solute + Heat of hydration
◇Hsoln = - ( - 7.3 × 10 ^ 2) + ( - 793 ) KJ / mol
◇H soln= - 63 KJ
Use enthalpy of solution equation to determine the enthalpy of solution for LiI
LiI ---> Li^ + + I^-
Molecular mass of LiI=133.85g
The chemical equation for the dissociation will be:
40gLiI (1molLiI)/133.85g LiI - 63KJ/1 mol LiI
18.82KJ
The heat was evolved because the value of enthalpy was negative
Phase transfer catalyst is used when oxidizing methoxybenzyl alcohol because it is able to dissolve in both the ethyl acetate and the aqueous layers.
What is phase transfer catalyst?
A phase-transfer catalyst, often known as a PTC, is a catalyst that helps a reactant move from one phase into another where a reaction takes place. Heterogeneous catalysis features a unique subset known as phase-transfer catalysis.
In the absence of a phase-transfer catalyst, ionic reactants are frequently soluble in an aqueous phase but insoluble in an organic phase. When introducing salts into the organic phase, the catalyst acts as a detergent. When a phase-transfer catalyst is added, the reaction is said to be catalyzed, which means it is accelerated.
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Answer:
Weight of the iceberg is metric ton
Explanation:
Molar mass of = 18 g
So, 6.01 kJ of heat energy is needed to melt 18 g of ice
Hence, kJ of heat energy is needed to melt of ice or g of ice
Now, = 1 metric ton
So, g = 1 metric ton ( 1 kg = 1000 g)
Hence, g = metric ton = metric ton
So, weight of the iceberg is metric ton