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adell [148]
3 years ago
9

How did Wegener use similar mountain ranges and areas made of certain types of rock found in Africa and South American as eviden

ce that these 2 continents were once connected?
Chemistry
1 answer:
Effectus [21]3 years ago
4 0

Answer:

the Germany scientist Alfred Wagner describes fold mountains that are found in The world are the same also geological similarity that occur between this continent are the same for example the rock that are found in brazil are the same of that of south africa.

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What is the mass of oxygen in 250 go of sulfiric acid, H2CO4
Nuetrik [128]
Hope this helps you.

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4 years ago
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An excited ozone molecule, O3*, in the atmosphere can undergo one of the following reactions,O3* → O3 (1) fluorescenceO3* → O +
Maurinko [17]

Answer:

The simplified expression for the fraction  is  \text {X} =    \dfrac{  {k_3  \times cM} }{k_1 +k_2 + k_3 }

Explanation:

From the given information:

O3* → O3                   (1)    fluorescence

O + O2                      (2)    decomposition

O3* + M → O3 + M    (3)     deactivation

The rate of fluorescence = rate of constant (k₁) × Concentration of reactant (cO)

The rate of decomposition is = k₂ × cO

The rate of deactivation = k₃ × cO × cM

where cM is the concentration of the inert molecule

The fraction (X) of ozone molecules undergoing deactivation in terms of the rate constants can be expressed by using the formula:

\text {X} =    \dfrac{ \text {rate of deactivation} }{ \text {(rate of fluorescence) +(rate of decomposition) + (rate of deactivation) }  } }

\text {X} =    \dfrac{  {k_3 \times cO \times cM} }{  {(k_1 \times cO) +(k_2 \times cO) + (k_3 \times cO \times cM) }  }

\text {X} =    \dfrac{  {k_3 \times cO \times cM} }{cO (k_1 +k_2 + k_3  \times cM) }

\text {X} =    \dfrac{  {k_3  \times cM} }{k_1 +k_2 + k_3  }    since  cM is the concentration of the inert molecule

7 0
4 years ago
Please help multiple choice 15 points
stellarik [79]

A is the answer to this question. Thank you.

5 0
3 years ago
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17 Which substance can not be broken down by a chemical change?(1) ammonia (3) propanal
lyudmila [28]
Zirconium cannot be broken down by a chemical change, because it is an element. The others are all molecules.
6 0
4 years ago
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What is the potential energy of a car with a mass of 1200kg at the top of a 42m high hill?
GalinKa [24]

Answer:

P.E = 493920 j

Explanation:

Given data:

Mass = 1200 kg

height = 42 m

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Solution:

Formula:

<em>P.E = mgh</em>

Now we will put the values in formula.

g = 9.8 m/s²

P.E = 1200 Kg × 9.8 m/s²× 42 m

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Kg.m²/s² = j

P.E = 493920 j

8 0
4 years ago
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