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2 years ago

Conservation Models Activity

Chemistry

1 answer:

erica [24]2 years ago

3 0

Answer:

first you need to pick out a model that u can use so u can define it into order

hope that works

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an unknown molecule is found to consist of 24.2% carbon by mass, 4.0% hydrogen by mass and the remaining mass is due to chlorine

Paha777 [63]

Answer:

C3 H6 Cl 3

Explanation:

C -24.2%

H - 4.0%

Cl - (100-24.2 - 4.0)=73.8 %

We can take 100g of the substance, then we have

C -24.2 g

H - 4.0 g

Cl - 73.8 g

Find the moles of these elements

C -24.2 g/12.0 g/mol =2.0 mol

H - 4.0 g/1.0 g/mol = 4. 0 mol

Cl - 73.8 g/ 35.5 g/mol = 2.1 mol

Ratio of these elements gives simplest formula of the substance

C : H : Cl = 2 : 4 : 2 = 1 : 2 : 1

CH2Cl

Molar mass (CH2Cl) = 1*12.0 +2*1.0 + 1*35.5 = 49.5 g/mol

Real molar mass = 150 g/mol

real molar mass/ Molar mass (CH2Cl) = 150 /49.5=3

So, Real formula should be C3 H6 Cl 3.

4 0

4 years ago

Read 2 more answers

A 5.00 gram sample of an oxide of lead PbxOy contains 4.33 g of lead. Determine simplest formula for the compund

Harrizon [31]

Answer: The empirical formula is $PbO_2$

Explanation:

Mass of Pb = 4.33 g

Mass of O = (5.00-4.33) g = 0.67 g

Step 1 : convert given masses into moles

Moles of Pb = $\frac{\text{ given mass of Pb}}{\text{ molar mass of Pb}}= \frac{4.33g}{207g/mole}=0.021moles$

Moles of O = $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{0.67g}{16g/mole}=0.042moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Pb = $\frac{0.021}{0.021}=1$

For O = $\frac{0.042}{0.021}=2$

The ratio of Pb O= 1: 2

Hence the empirical formula is $PbO_2$

6 0

3 years ago

Someone pls help me I will make you brain

harkovskaia [24]

Answer:

Explanation:

4 0

3 years ago

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For the Ag ground-state ion, predict the type of orbital from which an electron will need to be removed to form the ion of great

bagirrra123 [75]

Answer:

For the Ag ground-state ion, the type of orbital from which an electron will need to be removed to form the ion of greater positive charge is :

<u>s-orbital</u>

Explanation:

Naming of orbitals :

s = s-orbital

p = p-orbital

d = d-orbital

The electronic configuration of Ag is :

$[Kr]4d^{10}5s^{1}$

The Outermost shell = 5s

so electron should be removed from 5s . there is only 1 electron in 5s -shell. Hence , Ag exist +1 oxidation state.

According to Aufbau's Rule : Electron will be filled first in lower energy orbital.

The electron should be removed first ,from the higher energy orbital.This is because high energy orbitals are away from the nucleus and can be easily removed. The outermost electron feel less attraction of the nucleus

Ionization energy : Energy required to remove the electron from the outermost shell of the element in the gaseous state.

$Ag\rightarrow Ag^{+} +e^{-}$

Hence it will form Ag+ cation

$[Kr]4d^{10}$

Outer shell is removed after loss of electron.

4 0

4 years ago

Please help The sun uses nuclear fusion to generate its energy. In the very distant future, the sun will eventually run out of f

QveST [7]

Answer:

Explanation:

the answer is a because the sun cannot stop burning but will rather burn hotter Then decay amongst the atoms in space

5 0

2 years ago