Answer:
CuO+2HCl>h2o+CuCl2
fe203+6hcl->2fecl3+3h2O
gọi CuO, fe2o3 lần lượt là x,y
80x+160y=10
2x+6y=0.35
giải phương trình ta dc hai số x,y(tính phương trình kia ra)
cuo ban đầu sẽ là :60*x=z
fe203 ban đầu sẽ là :10-z=
Explanation:
The preparation of the reagents that will be made theoretically requires equivalent amounts of the organic halide and magnesium , but slightly Grignard reagent of the magnesium is normally used.
Explanation:
When the metal is binded to a carbon atom in an alkyl group a Grignard reagent is formed. An alkyl group contains a carbon and a hydrogen atom. Bromine and Iodine are the most common halogen atoms used during their reactivity. The magnesium is coated with a layer of magnesium oxide which inhibits reactions with the organic halide. The Grignard reaction is often used as a initiator.
The reaction starts with hydrocarbyl halide, based on organic history it is a big deal in the number of C - C bond forming reactions is very small, and Grignard reaction is the best and most effective reactions.
No of moles of Carbon, C = mass/ molar mass.
Molar mass of carbon = 12.0107. We only have to calculate the no of moles
of carbon to obtain carbon's mass. .
From Sucrose chemical formula C12H22O11 we know that there are 12
carbon atoms.
So there are 1.4x10^(20) x12 = 16.8 x 10^20 carbon atoms.
We will use avogardo's number to find out the number of carbon molecules
in the compound.
From Avogadro's no. One mole of any substance equals to 6.022140857
atoms.
So X mole contains 16.8 * 10^(20) carbon atom
(16.8x10^20 carbon atoms)/6.022 x10^23 particles/mol = 0.00279 mols
The molar mass of carbon is 12.0107g/mol so we'll multiply to get the mass:
0.00279 mols x 12 = 0.03348.
There it is fella hope u understood
Answer:
B) closer together, decreasing.
Explanation:
As you heat something, you apply energy to its molecules which tends to move, but here, the opposite happens