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Darina [25.2K]
3 years ago
5

In a typical chemical reaction, the subscript for a particular atom is written...

Chemistry
1 answer:
Lerok [7]3 years ago
6 0
The subscript in a chemical reaction cannot be changed. Its written like this:-

Ca₆

That means Ca = 6
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A pure substance is found to contain 53.7% fluorine and 46.3% xenon by mass. What is the empirical formula of this substance?
evablogger [386]

Answer: XF8

Explanation:

Empirical Formular shows the simplest ratio of elements in a compound.

 Xe = 46.3%             F  = 53.7%

Divide the percentage composition of each element by the atomic  mass.

Xe = 46.3/ 131.3                      F= 53.7/ 19

      = 0.353( approx)               =  2.826 (approx)

Divide through with the smallest of the answers gotten in previous step.

 Xe = 0.353 / 0.353                F = 2.826/ 0.353

       =  1                                       = 8.0

Empirical formular = XF8

3 0
3 years ago
How do I calculate the molecular and molar masses of compounds​
ludmilkaskok [199]

Answer:

The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol). The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.

6 0
3 years ago
Is rain chemical or mechanical weathering?
Blababa [14]
Mechanical! Hope I helped
3 0
3 years ago
Read 2 more answers
Calculate the number of joules released when 0.64 grams of steam (c = 2.04 l/g
allochka39001 [22]
The number  of  joules  released  when  0.64g  of   steam  are  cooled  from 125 c  to 105  c is  -26.112  joules

      calculation
by  use of Q=MCΔ T  formula  calculate the  joules released  where
Q( heat) =?
M (mass) =  0.64 g
C (specific heat capacity = 2.04 j/g/c
ΔT(change  in temperature) =  105-125 =-20c

Q  is  therefore = 0.64 g   x2.04 j/g/c x -20  c = -26.112  joules

it  is okay  to have negative value  since  the  reaction   is exothermic that  is heat  is  released


7 0
3 years ago
Which of the following reasons correctly explains the color changes that take place when ethylenediamine (C2N2H8) is added to th
pickupchik [31]

Answer:

The water ligands surrounding the cobalt metal center are being replaced by ethylenediamine and chloride ligands which results in a different crystal field splitting. Thus, the energy associated with electron transitions between the do-orbitals will differ for the two compounds showing a color change.

Explanation:

The five d-orbitals are usually degenerate. Upon approach of a ligand, the d-orbitals split into two sets of orbitals depending in the nature of the crystal field.

The magnitude of crystal field splitting is affected by the nature of the ligand. Ligands having filled p-π orbitals such as ethylenediamine lead to greater crystal field splitting.

The change in the colour that takes place when ethylenediamine is added to the solution of cobalt(II) chloride occurs due to a different crystal field splitting pattern. Thus, the energy associated with electron transitions between the d-orbitals now differ for the two compounds showing a color change.

7 0
2 years ago
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