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find the mass of h2 produced Binary compounds of alkali metals and hydrogen react with water to produce H2(g). The H2H2 from the

scZoUnD [109]

Answer: Mass of hydrogen produced is 0.0376 g.

Explanation:

The reaction equation will be as follows.

$NaH(aq) + H_{2}O(l) \rightarrow H_{2}(g) + NaOH(aq)$

Now, formula for total pressure will be as follows.

$P_{total} = P_{H_{2}} + P_{H_{2}O}$

Hence, $P_{H_{2}} = P_{total} - P_{H_{2}O}$

= 755 mm Hg - 42.23 mm Hg

= 712.77 mm Hg

$P_{H_{2}} = \frac{712.77 \times 1 atm}{760 mm Hg}$

= 0.937 atm

Now, we will calculate the moles of $H_{2}$ as follows.

$P_{H_{2}}V = nRT$

$0.937 atm \times 0.505 L = n \times 0.0821 \times 308.15 K$

n = $\frac{0.473}{25.29}$ mol

= 0.0187 mol

Therefore, mass of $H_{2}$ will be calculated as follows.

$m_{H_{2}} = \frac{0.0187 mol \times 2.0158 g}{1 mol}$

= 0.0376 g

Thus, we can conclude that mass of hydrogen produced is 0.0376 g.

7 0

3 years ago

Part A Name the complex ion [Fe(CN)6]^3- . The oxidation number of iron is +3. Part B Name the complex ion [Cu(NH3)2(H2O)4]^2+ .

zvonat [6]

Answer:

Part A: Hexacyanoferrate (III)

Part B: DiammintetraaquoCupperate (II)

Part C: Dichlorobis(ethylenediamine) Chromate (II)

Part D: Triaquocarbonylnickel (II) Sulphate

Part E: Potassium Dicarbonatedifluoroplatinate (II)

Explanation:

For naming the complex ions there is a specific rule

Nomenclature of the complex ions are as follow

write a correct formulae
Indicate the oxidation number of metal in the complex

The oxidation number should write in the roman numeral in perenthasis after metal name
Ligand named before the metal ion
Ligan can be named in following order

* 1st negative, 2nd neutral, 3rd positive

* If there are more than 2 same charged ligand the write in

alphabetical order.

Write prefix i.e di, tri, tetra for multiple monodentate ligands
Anions name end at ido the replace the final name.
Neutral ligands named as their usual name, but there are some exceptions such as

NH3 named as ammine

H2O names aqua or aquo

CO named ascarbonyl

NO named as nitrosyl

If the complex is an anion, then name of the central atom will end in -ate, and its Latin name will be used except for mercury
The name of full complex will end with cation or anion with separate word.

Keeping the rules in mind the complexes named as following.

_________________________

Part A:

[Fe(CN)₆]³⁻

Name of the Complex : Hexacyanoferrate (III)

___________________

Part B:

[Cu(NH₃)₂(H₂O)₄]²⁺

Name of the Complex : DiammintetraaquoCupperate (II)

_______________________

Part C

CrCl₂(en)₂

Name of the Complex : Dichlorobis(ethylenediamine) Chromate (II)

________________________

Part C

[Ni(H₂O)₃(CO)]SO₄

Name of the Complex : Tetraaquocarbonylnickel (II) Sulphate

______________________

Part E

K₄[Pt(CO₃)₂F₂]

Name of the Complex : Potassium Dicarbonatedifluoroplatinate (II)

5 0

3 years ago

The mixture you separated was a mixture of iron filings, sand, and salt. Based on your understanding of matter, is this mixture

Anarel [89]

Its a heterogeneous mixture

The parts are not uniformly mixed

5 0

3 years ago

Calculate the ph of a solution whose(oh^-) is 4.583*10^-5 mole dm cube (pkw=14)

Sergeu [11.5K]

pH of solution = 9.661

<h3>Further explanation </h3>

pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.

pH = - log [H⁺]

So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.

pOH=-log[OH⁻]

$\tt pOH=-log[4.583\times 10^{-5}]\\\\pOH=5-log~4.583=4.339$

pH+pOH=pKw

$\tt pH=14-4.339\\\\pH=9.661$

8 0

3 years ago

IM ON A TIME LIMIT ANSWER FAST ILL GIVE 20 POINTS AND A BRAINEST ANSWERHow will a short-term environmental change most likely af

gtnhenbr [62]

Answer:

first and 4th

Explanation:

4 0

3 years ago