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Alisiya [41]
3 years ago
14

Applying the principle that the elements of a particular column in the Periodic Table share the same chemical properties, comple

te the following chart. The first one has been done for you.
FormulaNew CombinationPredicted Formula
Cu₂Osilver + oxygenAg₂O
NaClpotassium + chlorine
AlCl₃aluminum + fluorine
CO₂tin + oxygen
MgCl₂calcium + bromine
HClcesium + iodine
CCl₄silicon + bromine

Chemistry
2 answers:
natka813 [3]3 years ago
3 0
Note: The reactions are not balanced

K + Cl → KCl

Al + F → AlF₃

Sn + O → SnO₂

Ca + Br → CaBr₂

Cs + I → CsI

Si + Br → SiBr₄
Marianna [84]3 years ago
3 0

Answer :

New combination                                 Predicted formula

K      +       Cl                                          KCl

Al     +       F                                           AlF_{3}    

Sn    +        O_{2}                                        SnO_{2}  

Ca    +       Br                                           CaBr_{2}

Si      +       Br                                         SiBr_{4}

Ce     +       I                                              CeI

Explanation :

New combination and predicted formula of given compounds are shown below in image.

Ionic compounds are the ones which are formed when metal and non-metal combines in their ionic form.

For the formation of compound, all charges on the metal and non-metal should be balanced.

Like, we take an example of compound CaBr_{2}, in this the +2 charge of Ca is balanced by the 2Br^{-} ions.



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aksik [14]

Answer:

0.4058L of 1.0M H3PO4

0.2192L of 1.5M NaOH

Explanation:

The pKa of the H3PO4 / H2PO4- buffer is 2.12

To solve this question we must use H-H equation for this system:

pH = pKa + log [H2PO4-] / [H3PO4]

2.75 = 2.12 +  log [H2PO4-] / [H3PO4]

0.63 = log [H2PO4-] / [H3PO4]

<em>4.2658 = [H2PO4-] / [H3PO4] (1)</em>

Where [] could be taken as the moles of each reactant

As you have H3PO4 solution, the reaction with NaOH is:

H3PO4 + NaOH → H2PO4- + Na+ + H2O

As you can see, both H3PO4 and H2PO4- comes from the same 1.0M H3PO4 solution

The moles of H3PO4 are:

[H3PO4] = Moles H3PO4 - Moles NaOH

And for H2PO4-:

[H2PO4-] = Moles NaOH added

Replacing in (1):

4.2658 = [Moles NaOH] / [Moles H3PO4 - Moles NaOH]

4.2658 Moles H3PO4 - 4.2658 moles NaOH = Moles NaOH

4.2658 Moles H3PO4 = 5.2658 moles NaOH <em>(1)</em>

<em></em>

In volume:

0.625L = Moles H3PO4 / 1.0M + Moles NaOH / 1.5M

0.625 = Mol H3PO4 + 0.6667 Moles NaOH <em>(2)</em>

Replacing (2) in (1):

4.2658 Moles H3PO4 = 5.2658 (0.625 - Mol H3PO4 / 0.6667)

4.2658 Moles H3PO4 = 5.2658 (0.625 - Mol H3PO4) / 0.6667

4.2658 Moles H3PO4 = 5.2658*(0.9375 - 1.5 mol H3PO4)

4.2658 Moles H3PO4 = 4.9367 -7.8983 mol H3PO4

12.1641 mol H3PO4 = 4.9367

Mol H3PO4 = 0.4058moles * (1L / 1.0moles) =

0.4058L of 1.0M H3PO4

And:

0.625L - 0.4058L =

0.2192L of 1.5M NaOH

5 0
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D) 60°C

Explanation:

The molecules of Nitrogen gas will have the highest average kinetic energy when their temperature is the highest.

According the kinetic molecular theory, the temperature of gases is directly proportional to their average kinetic energy.

 The higher the temperature, the more kinetic energy they possess.

To find out the highest temperature from the given options, we need to solve and express all the given options in a single unit of temperature.

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Let us convert all to Kelvin;

 -40°C;

       K = 273 + (-40) = 233K

 60°C;

       K = 273 + 60  = 333K

We can see that 60°C has the highest temperature in kelvin and this will furnish the gas with the greatest average kinetic energy.

learn more:

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Answer:

The correct answer will be option-Transcription takes place in the nucleus, and translation takes place in ribosomes.  

Explanation:

The regulation of gene is regulated and controlled by two main processes of central dogma called transcription and translation.

Transcription is the process of formation of messenger RNA or mRNA from a single strand of DNA whereas translation is the formation of protein from mRNA.

This process takes place in different sites in prokaryotes and eukaryotes. In prokaryotes, both transcription and translation take place in the cytoplasm but in eukaryotes, the transcription takes place in the nucleus whereas translation takes place in the ribosomes present in the cytoplasm.

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