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3 years ago

Which of these statements is true?

Chemistry

1 answer:

Effectus [21]3 years ago

8 0

I think is number 4

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Why should you prefer dry ashing to wet ashing of food sample such as cabbage

julia-pushkina [17]

Answer:

Wet ashing is primarily used in the preparation of samples for subsequent analysis of specific minerals . It breaks down and removes the organic matrix surrounding the minerals so that they are left in an aqueous solution

Explanation:

8 0

3 years ago

What is a zero order reaction? Give two examples.

dezoksy [38]

Answer:

I guess 3 to be honest and that's what I think

4 0

3 years ago

Write the net ionic equation for the reaction of aqueous solutions of ammonium chloride and iron(III) hydroxide.

vagabundo [1.1K]

Answer:

$Fe(OH)_3(s)\rightarrow Fe^{3+}(aq)+3OH^-(aq)$

Explanation:

Hello.

In this case, for the reaction between aqueous solutions of ammonium chloride and iron (III) hydroxide, we have the following complete molecular reaction:

$3NH_4Cl(aq)+Fe(OH)_3(s)\rightarrow 3NH_4OH+FeCl_3$

And the full ionic equation, taking into account that the iron (III) hydroxide cannot be dissolved as it is insoluble in water:

$3NH_4^+(aq)+3Cl^-(aq)+Fe(OH)_3(s)\rightarrow 3NH_4^+(aq)+3OH^-(aq)+Fe^{3+}(aq)+3Cl^-(aq)$

Finally, the net ionic equation, considering that spectator ions are NH₄⁺, Cl⁻ as they are both the left and right side, therefore, the net ionic equation is:

$Fe(OH)_3(s)\rightarrow Fe^{3+}(aq)+3OH^-(aq)$

Best regards.

8 0

3 years ago

!!20 Points!!

elena-14-01-66 [18.8K]

Answer:Tungsten changes oxidation numbers +6 to zero

Undergoes reduction

Explanation:

did it!

4 0

3 years ago

PLEASE HElP ASAP!!!!!!

stepan [7]

Answer:

1 hour

Explanation:

7 0

3 years ago