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2 years ago

Covalently bonded compounds differ from ionically bonded compounds because:

1 answer:

3 0

Answer:Covalently bonded materials are less dense than metallic or ionically bonded ones because covalent bonds are directional in nature whereas metallic and ionic are not; when bonds are directional, the atoms cannot pack together in a dense manner, yielding a lower mass density then solids with non-directional bonds.

Explanation:

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Alum is a compound used in a variety of applications including cosmetics, water purification, and as a food additive. It can be

vlabodo [156]

Answer:

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

Explanation:

Mass of bottle = 10.221 g

Mass of bottle with aluminium pieces = 11.353 g

Mass of aluminium = 11.353 g - 10.221 g = 1.132 g

Mass of alum and bottle = 19.230 g

Mass of alum = 19.230 g - 10.221 g = 9.009 g

Experimental yield of alum = 9.009 g

Theoretical yield of alum:

$2Al(s) +2 KOH(aq) +4H_2SO_4(aq)+10 H_2O(l) \rightarrow 2 KAl(SO_4)_2.12 H_2O(s)+3H_2(g)$

Moles of aluminium = $\frac{1.132 g}{27 g/mol}=0.041926 mol$

According to reaction, 2 moles of aluminum gives 2 moles of alum.

Then 0.041926 mol aluminium will give :

$\frac{2}{2}\times 0.041926 mol=0.041926 mol$ of alum.

Mass of 0.041926 moles of alum:

0.041926 mol × 474 g/mol= 19.873 g

Theoretical yield of alum = 19.873 g

Percentage yield:

$\% Yield =\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

Percentage yield of the alum:

$\% Yield =\frac{ 9.009 g}{19.873 g}\times 100=45.33\%$

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

7 0

3 years ago

Give the ion notation for an atom with 34 protons and 36 electrons

alexandr402 [8]

Se - 78
Selenium - 78
or
78/34 Se2-

4 0

3 years ago

Aluminum, sulfur, and chorine are elements found on the periodic table. Tests

hoa [83]

Aluminum is malleable and conducts Electricity

3 0

2 years ago

Please help ASAP Read thing for the question thanks!!

katovenus [111]

Answer:

JOSHUA

Explanation:

JOSHUA

4 0

2 years ago

The value of the Solubility Product Constant for lead phosphate is ____________

emmasim [6.3K]

Answer: The reaction for the $K_{sp}$ value of lead phosphate is given below and the value of solubility product for the same is $3.0\rightarrow 10^{-44}$

Explanation:

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio. It is expressed as $K_{sp}$

The chemical formula of lead phosphate is $Pb_3(PO_4)_2$

The equation for the hydration of the lead phosphate is given as:

$Pb_3(PO_4)_2(s)+H_2O(l)\rightarrow 3Pb^{2+}(aq.)+2PO_4^{3-}(aq.)$

The solubility product of lead phosphate is $3.0\rightarrow 10^{-44}$ . This means that it is highly insoluble in water as the solubility product is very very low.

Hence, the reaction for the $K_{sp}$ value of lead phosphate is given above and the value of solubility product for the same is $3.0\rightarrow 10^{-44}$

4 0

3 years ago