Answer:
Hair and nails are mostly made of protein. Your body uses protein to build and repair tissues. You also use protein to make enzymes, hormones, and other body chemicals. Protein is an important building block of bones, muscles, cartilage, skin, and blood.
Explanation:
Answer:
a) cH4(g) +2O(g)__ CO2(g) +2H2O(g)
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The student should set up an experiment in which he will require a crucible, a sample of hydrated copper sulfate (CuSO₄ <span>• 5H</span>₂O), a hot plate and a digital mass balance.
First, the student should check the mass of the empty crucible, then add the sample to the crucible and check the mass again. The difference is the mass of the sample.
Next, the student should place the crucible on a hot plate and begin heating the sample. After regular time intervals, such as two minutes, the students should measure the mass of the crucible and sample and note it down until it stops decreasing.
After a final mass of the sample has been obtained, the student may subtract this from the initial mass and find the mass of water evaporated.
The enthalpy of the reaction can be obtained from the enthalpies of formation as -16.2 kJ/mol.
<h3>What is the enthalpy of reaction?</h3>
We know that any time that there is a chemical reaction, there is an interaction that place between the reactants and the products and as such we are going to get new substances and these are the substances that I have referred to here as the products of the reaction.
In this case, we are asked to obtain the enthalpy change of the reaction. This tells us the heat that could have been absorbed or evolved in the reaction. We have to at this point know that the enthalpy change of the reaction gotten from;
Sum of enthalpy of the products - Sum of enthalpy of the reactants
ΔH = [(-484.5)] - [(-393.5) + (-74.8)]
ΔH = (-484.5) + 468.3
ΔH = -16.2 kJ/mol
Learn more about enthalpy:brainly.com/question/3393755
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Answer:
112.18 g.
Explanation:
you're using stoichiometry to find the mass of the compound S₃O.