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aalyn [17]
3 years ago
7

Magnesium reacts with oxygen to form two compounds. Compound A contains 7.88 g of magnesium for every 15.68 g of oxygen. Compoun

d B contains 2.12 g of magnesium for every 6.91 g of oxygen. What is the mass ratio of magnesium rounded to the nearest whole number
Chemistry
1 answer:
Marina CMI [18]3 years ago
4 0

Answer:

Mass ratio of magnesium =  2 : 1

Explanation:

Let us write down the masses of element involve to form the compounds .

Compound A → 7.88 g of mg and 15.68 g of 02

Compound B → 2.12 g of mg and 6.91 g of 02

since we want to get the mass ratio of magnesium, we divide the mass of mg with the other element present (oxygen) . we want to make both compound in equal proportions.

Compound A →  7.88 / 15.68  = 0.5025510204 g of Mg /1 g of Oxygen

Compound B  →  2.12 / 6.91  = 0.30680173661  g of Mg/ 1 g of Oxygen

Mass ratio of magnesium = compound A(Mg)/compound B(Mg)

Mass ratio of magnesium = 0.5025510204/0.30680173661  

Mass ratio of magnesium = 1.63803186368 /1

Mass ratio of magnesium =  2 : 1

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Answer:

a. eletrophile

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c. faster

Explanation:

Necleophile reaction is chemical reaction in which electron rich chemical specie replaces functional group with another electron deficient molecule. Lewis acid catalyst is organic chemical reaction which lewis acid act as electron pair acceptor. Nucleophile reaction proceeds about 25 times more faster than benzene.

6 0
3 years ago
Can someone please help and list what each type of thing they are? (Element, Compound, Mixture of elements, Mixture of compounds
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1. B
2. C
3. E
4. D
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7. A
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Hope this helps!
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3 years ago
Why does pumping more air into a basketball increse the pressure inside the ball?
scoundrel [369]
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8 0
3 years ago
What is the wavelength of a photon with an energy of 3.38 x 10-19 J?
irina1246 [14]

Answer:

C. 588 nm

Explanation:

Given parameters:

Energy of the photon  = 3.38 x 10⁻¹⁹J

Unknown:

Wavelength of the photon   = ?

Solution:

The energy of a photon can be expressed as;

     E = \frac{hc}{wavelength}

    hc  = E x wavelength

     Wavelength  = \frac{hc }{E}  

  h is the Planck's constant = 6.63 x 10⁻³⁴m²kg/s

  c is the speed of light  = 3 x 10⁸m/s

  E is the energy  

   Wavelength = \frac{6.63 x 10^{-34} x 3 x 10^{8} }{3.38 x 10^{-19} }    = 5.89 x 10⁻⁷m

4 0
3 years ago
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Identify which one of the three methods of analysis (i.e., TLC, IR and melting point) provides information about the structure o
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Answer:

IR provides structural information about a molecule. TLC and melting point analysis do not provide structural information.

Explanation:

IR gives information about the functional groups present in a molecule. The vibrational frequency of each functional group gives information about the structure of the entire molecule.

Structural features of a molecule are deduced by matching the vibrational frequencies of  groups obtained from the IR spectroscopy with that of known functional groups in literature.

Melting point is a qualitative method that can only yield information about the identity of a compound and not its structure. Each compound has its unique melting point recorded in literature and any pure sample of the same compound must have the same sharp meting point.

Thin-layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures. After separating the components of the mixture, it does not give any information regarding the identity or the structure  of the components of the mixture.

Therefore, only IR yields structural information about a sample.

6 0
2 years ago
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