The student originally has 252 grams of water in this experiment.
LAW OF CONSERVATION OF MASS:
- The law of conservation of mass explains that matter (mass) can neither be created nor destroyed but can be changed from one form to another.
- This means that in a chemical reaction, the sum of the masses of the reactants must equate to the total mass of product(s).
- According to this question, a student conducts an experiment to separate water into hydrogen and oxygen. The student collects 28.0 g of hydrogen and 224.0 g of oxygen.
- Since hydrogen and oxygen are the constituent elements of water, the sum of their masses must equate the mass of water.
- Therefore, 224g of oxygen + 28g of hydrogen = 252g of water.
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Chloral hydrate has the formula <span>C2H3Cl3O2
mass of carbon : 12
mass of Cl : 35.5
mass of hydrogen : 1
mass of oxygen : 16
So, molar mass of chloral hydrate = 2(12) + 3(1) + 3(35.5) + 2(16) = 165.5 gm
1 mole contains </span><span>6.02 x 10^23 molecules
Thus, mass of one molecule = 165,5 / (</span><span>6.02 x 10^23) = 2.75 x 10^-22 gm
therefore, mass of 500 molecules is equal to:
500 x 2.75 x 10^-22 = 1.37 x 10^-19 gm</span>
Answer:
The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.
Explanation:
yw <3
Answer:
C. 2.9 atm
Explanation:
- Use combined gas law formula and rearrange it.
- Convert C to K.
- Hope that helped! Please let me know if you need a further explanation.