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Andrei [34K]
3 years ago
7

Explain the concept of kenetic molecular theory

Chemistry
1 answer:
Sedaia [141]3 years ago
5 0
Not sure if you meant kinetic.. The theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. The theory is based on the idea that matter is composed of tiny particles that are always in motion.
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Which rock will experience a faster rate of chemical weathering?
dimulka [17.4K]
I would say that the answer is A), small, broken pieces of rock! Good luck!
8 0
4 years ago
1. An unknown amount of mercury (II) oxide was decomposed in the lab. Mercury metal was formed and 4.50 L of oxygen gas was rele
Musya8 [376]

Answer:

1. 59.1 g HgO

2. A.) 38.2 L

3. B.) It is directly proportional to the number of moles of the gas.

Step-by-step explanation:

1. Mass of HgO

We know we will need a chemical equation with masses and molar masses, so let's gather all the information in one place.

M_r:   216.59

          2HgO ⟶ 2Hg + O₂

(a) Calculate the <em>moles of O₂</em>  

pV = nRT            Divide each side by RT  

 n = (pV)/(RT)  

<em>Data: </em>

p = 0.970 atm  

V = 4.50 L  

R = 0.082 06 L·atm·K⁻¹mol⁻¹  

T = 390.0 K  

<em>Calculation: </em>

n = (0.970 × 4.500)/(0.082 06 × 390.0)  

n = 0.1364 mol O₂

(b) Calculate the <em>moles of HgO </em>

The molar ratio is 1 mol O₂/2 mol HgO.

Moles of HgO = 0.1364 mol O₂ × (2 mol Hg/1 mol O₂)

Moles of HgO = 0.2728 mol HgO

(c) Calculate the <em>mass of HgO </em>

Mass of HgO = 0.2728 mol HgO × (216.59 g HgO/1 mol HgO)

Mass of HgO = <em>59.1 g HgO</em>

This isn't any of the options in your list. Have I made an error?

2. Volume of Hydrogen

              Mg + 2HCl ⟶ MgCl₂ + H₂

n/mol:              3.00

(a) Calculate the <em>moles of H₂ </em>

The molar ratio is (1 mol H₂/2 mol HCl).

Moles of H₂ = 3.00 mol HCl × (1 mol H₂/2 mol HCl)

Moles of H₂ = 1.50 mol HCl

(b) Calculate the <em>volume of H₂ </em>

pV = nRT     Divide both sides by p

 V = (nRT)/p

<em>Data: </em>

n = 1.50 mol

T = 298 K

p = 0.960 atm

<em>Calculation: </em>

V = (1.5 × 0.082 06 × 298)/0.960

V = 38.2 L

3. Volume of gas

pV = nRT

 V = nRT/p

If T and p are constant, (RT)/p = constant = k

V = kn

V ∝ n

The volume is directly proportional to the number of moles of the gas.

3 0
4 years ago
Select all the discoveries for which ernest rutherford is credited. the emissions of radioactive elements the neutron the electr
liberstina [14]
 Rutherford is very well-known for his gold foil experiment. He used alpha rays to strike the gold foil. Before this he also observed radioactive decay. But in the gold foil experiment, he discovered the nucleus and the proton. So, the acceptable answers are: <span><em>emissions of radioactive elements and the proton</em>.</span>
8 0
4 years ago
What is the boiling point in degrees Celsius of water
aliya0001 [1]

Answer:

100 degree celsius

Explanation:

6 0
4 years ago
Between Lab Period 1 and Lab Period 2, design a separation scheme for all 4 cations. Use the results of your preliminary tests a
fiasKO [112]

Answer:

                    SEPARATION SCHEME FOR  CATIONS

GIVEN  CATIONS : Ag^{+} \ ,  Fe^{3+} , Cu^{2+}, Ni^{2+}

     

    Step 1:   Add 6mol/dm^3 of HCl to the mixture solution

    Result : This would cause a precipitate of AgCl to be formed

    Reaction :  Ag^{+} _{(aq)} + Cl^{-} _{(aq)}  ---------> AgCl(ppt)

    Step 2 : Next is to remove the precipitate and add H_2S to the remaining          

                 solution in the presence of 0.2 \ mol/dm^3 of HCl

     Result : This would cause a precipitate of CuS to be formed

     Reaction :  Cu^{2+}_{(aq)} + S^{2-}_{(aq)} ------> Cu_2S(ppt)

 

     Step 3: Next remove the precipitate then add 6 \ mol/dm^3 of aqueous      

                 NH_3 (NH_3 \cdot H_2 O) , process the solution in a centrifuge,when the  

                 process  is done then sort out the  precipitate from the  solution

                 Now this precipitate is   Fe(OH)_3 and the remaining solution

                contains  (Ni (NH_3)_6)

                 Next take out the precipitate to a different beaker and add HCl

                to it   this will dissolve it, then add a drop of NH_4SCN this will

                form  a precipitate  Fe(SCN)_{6}^{3-} which will have the color of

                 blood  indicating the presence of Fe^{3+}

             

   Reaction :   F^{3+}_{(aq)} + 30H^-_{(aq)} --------->Fe(OH)_3_{(aq)}

                        Fe (OH)_{(s)} _3  + 3H^{+}_{aq} -------> Fe^{3+}_{aq} + 3H_2O_{(l)}

                         Fe^{3+} + 6SCN^{-} -----> Fe(SCN)_6 ^{3-}

                      Now the remaining mixture contains Ni^{2+}

     

       

Explanation:

6 0
4 years ago
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