Answer:
Explanation:
entire mixture = 5.32g
F = 3.12g --> 3.12g*(1mol/18.998g) = 0.1642mols F
Since LiF has 1mol Li to 1 mol F,
0.1642mols F* (1mol Li/1 mol F) = 0.1642mols Li
Convert into grams:
0.1642mols Li * (6.94g/1mol) =1.1397g Li
So add the masses of Li and F together:
3.12g F + 1.1397g Li = 4.2597g LiF
5.32g - 4.2597g LiF = 1.06g KF
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Basically what we did is convert the given mass of F to mols and since we know that there is a 1:1 mole ratio of F to L, the number of mols of F is the number of mols of Li. Change the mols of Li to grams and then add the mass of Li with given mass of F. You now have the mass of LiF. To find mass of KF, subtract mass of LiF from mass of entire mixture.
They are uniform in the amount of protons and electrons but can differ in the amount of neutrons.
Answer:
No atoms are created or destroyed in a chemical reaction. The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions.
Explanation:
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.
This means that the total mass of the products in a chemical reaction will be the same as thetotal mass of the reactants .
Answer:
Option C
Explanation:
No. of Molecules=(Given Weight/Molar weight)*Avagadro No.
Given weight of H2O=3.01g
Molar weight of H2O=18g
On applying the formula, we get:
No. of Molecules=(3.01/18)*6.023*10²³=1.01*10²³
A statement about how things act in the natural world
Scientific law is “describing” phenomenas in nature and is generally accepted to be true
Scientific theory is “explaining” why those phenomenas happen and can be proven or disproven
