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3 years ago

Of the choices, which metal element would be the most reactive? (Please explain why the answer is the answer).

Chemistry

2 answers:

mart [117]3 years ago

7 0

Answer:

sulfur

Explanation:

sulfur because it have unknown metal

i just got done with the unit 2 weeks ago

sasho [114]3 years ago

5 0

A sulfur because it is the closest to fr

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Which equation agrees with ideal gas law?

Julli [10]

Https://www.gstatic.com/education/formulas2/355397047/en/boyle_s_law.svg

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3 years ago

A 1.362 g sample of an iron ore that contained Fe3O4 was dissolved in acid with all of the iron being reduced to iron (II). The

Natasha2012 [34]

Answer:

a. MnO₄⁻ + 8H⁺ + 5Fe²⁺ → 5Fe³⁺ + Mn²⁺ + 4H₂O

b. 18.17% of Fe in the sample

Explanation:

a. In the reaction, Fe²⁺ is oxidized to Fe³⁺ and permanganate, MnO₄⁺ reduced to Mn²⁺, thus:

Fe²⁺ → Fe³⁺ + 1e⁻

MnO₄⁻ + 5e⁻ + 8H⁺ → Mn²⁺ + 4H₂O

5 times the iron and suming the manganese reaction:

MnO₄⁻ + 5e⁻ + 8H⁺ + 5Fe²⁺ → 5Fe³⁺ + 5e⁻ + Mn²⁺ + 4H₂O

b. Moles of permanganate in the titration are:

0.03942L × (0.0281 moles / L) = <em>1.108x10⁻³ moles of MnO₄⁻</em>

Based on the reaction, 1 mole of permanganate reacts with 5 moles of iron, if 1.108x10⁻³ moles of MnO₄⁻ reacts, moles of iron are:

1.108x10⁻³ moles of MnO₄⁻ × (5 moles Fe²⁺ / 1 mole MnO₄⁻) =

<em>4.431x10⁻³ moles of Fe²⁺</em>. Molar mass of Fe is 55.845g/mol. 4.431x10⁻³ moles of Fe²⁺ are:

4.431x10⁻³ moles of Fe²⁺ ₓ (55.845g / mol) =

<h3>0.2474g of Fe you have in your sample.</h3>

Percent mass is:

0.2474g Fe / 1.362g sample ₓ 100 =

<h3>18.17% of Fe in the sample</h3>

6 0

3 years ago

Consider the reaction. 2 NaCl ( aq ) + Ba ( OH ) 2 ( aq ) ⟶ BaCl 2 + 2 NaOH Identify the precipitate, or lack thereof, for the r

Luba_88 [7]

<u>Answer:</u> The precipitate formed in the given reaction is $BaCl_2$

<u>Explanation:</u>

Precipitation reaction is defined as the reaction in which an insoluble salt is formed when two solutions are mixed containing soluble substances.

Precipitate is the insoluble salt which settles down at the bottom of the reaction mixture.

For the given chemical reaction:

$2NaCl(aq.)+Ba(OH)_2(aq.)\rightarrow BaCl_2(s)+2NaOH(aq.)$

By Stoichiometry of the reaction:

2 moles of aqueous sodium chloride reacts with 1 mole of aqueous barium hydroxide to produce 1 mole of solid barium chloride and 2 moles of aqueous sodium hydroxide

Hence, the precipitate formed in the given reaction is $BaCl_2$

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3 years ago

How do prokaryotic cells differ from eukaryotic cells

Varvara68 [4.7K]

Answer:

eukaryotic have nuclei but prokaryotic don't.

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3 years ago

Explain why a fluoride ion is smaller than a chloride ion.

kari74 [83]

Answer:

Fluorine element has less orbitals than chlorine.

Explanation:

They are both in the same group so they have to gain the same amount of electrons(which will not effect shape)....However on going down the group one notices that the atoms get larger as more orbitals are needed to hold the electrons.

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3 years ago