1 year ago

How many significant figures are in 0.00102?

Chemistry

2 answers:

Lunna [17]1 year ago

8 0

Answer:

3 digits

Explanation:

The first nonzero digit is counted as a significant digit and the zero inbetween 2 nonzero digits count too.

Therefore, the significant digits are 0.00102.

zaharov [31]1 year ago

7 0

Answer:

Explanation:

102 are significant figures

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

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Answer:

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

Explanation:

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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:

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

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