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Tcecarenko [31]
3 years ago
9

What would you call the following chemical reaction, Zn(s) + H2O(g) – Zno (s) + H2(g)

Chemistry
1 answer:
egoroff_w [7]3 years ago
5 0

I'd say it's single replacement/displacement

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You may have to recrystallize any or all of the components of your extraction mixture, benzoic acid, ethyl-4-aminobenzoate and f
hjlf

Answer:

the Recrystallization solvents are;

-Sodium Hydroxide Base (NaOH)

- Hydrochloric Acid (HCl)

- Sand bath when acidic and basic components are removed.

Explanation:

Recrystallization is simply a technique used to purify an impure compound in a solvent.

Now, we want to purify the mixture of benzoic acid, Ethyl-4-aminobenzoate and fluorenone.

For the benzoic acid, it can be separated out of the mixture by addition of sodium hydroxide base (NaOH).

The Ethyl - 4 - aminobenzoate will be separated from the mixture by the addition of Hydrochloric Acid (HCl).

The fluorenone would be separated out by heating the mixture in a sand bath after the basic and acidic components have already been extracted out.

Thus, the Recrystallization solvents are;

-Sodium Hydroxide Base (NaOH)

- Hydrochloric Acid (HCl)

- Sand bath when acidic and basic components are removed.

6 0
3 years ago
Which properties represent a non metal ( there are more than one answer )
MAVERICK [17]

Answer:

B.) Dull

C.) Poor conductors

D.) Brittle

7 0
3 years ago
What is the percent yield of alum if 0.4000 grams of aluminum is used in the synthesis of alum and 4.8946 grams of alum is actua
slamgirl [31]
% yield = actual yield/ theoretical yield x 100%

4.8946 / 0.4 = 12.2365 

% yield = 12.2365 x 100 = 1223.65%
7 0
3 years ago
When organic matter decomposes under oxygen-free (anaerobic) conditions, methane is one of the products. Thus, enormous deposits
Nataliya [291]

The mass of methane is 1.117×10^17 g.

Given,

∆H°rxn =-802kj/mol

1Ej = 10^18 j =10^-3×10^18 kj

802kj of energy is released by 1 mol of CH4.

1kj of energy is released by 1/802 mol of CH4.

5600Ej of energy is released= 5600/802 mol of CH4

5600×10^18×10^-3 kj of energy is released

=5600 × 10^18 × 10^-3 /802 mol

=6.982 ×10^15 mol of CH4

We know,

the molecular mass of CH4 = 16 g

1 mol of CH4 = 16g

6.982×10^15 mol = 16 × 6.982 × 10^15 = 1.117×10^17 g

Hence, the mass of methane is 1.117×10^17 g.

Learn more about methane here :

brainly.com/question/694309

#SPJ4

7 0
2 years ago
How does silicon dioxide become a covalent bond. (explain)
tatuchka [14]
Silicon dioxide is SiO2.  Silicon has 4 valence electrons, while each oxygen has 6 valence electrons.  This can be shown as 
     **             *                   *
**  O *       *  Si   *        *   O  **
      *               *                 **
At points where there is one valence electron, represented by a lone *, the electrons will be 'shared' between the atoms.  This will make silicon dioxide appear as
   **           *--------------- *
**  O *--*  Si   * ------ *   O  **
      *------- *                 **
, as the lines with no arrows indicate that each electron moves between the atoms, and does not stay with one forever.
4 0
4 years ago
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