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Zolol [24]
3 years ago
9

How many moles of O2 are needed to react with 2.35 mol of C2H2?

Chemistry
2 answers:
adelina 88 [10]3 years ago
7 0

Answer : The number of moles of O_2 needed are 5.88 moles.

Solution : Given,

Moles of C_2H_2 = 2.35 mole

The balanced chemical reaction will be,

2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O

From the balanced reaction we conclude that

As, 2 moles of C_2H_2 react with 5 moles of O_2

So, 2.35 moles of C_2H_2 react with \frac{2.35}{2}\times 5=5.88 moles of O_2

Therefore, the number of moles of O_2 needed are 5.88 moles.

Mrrafil [7]3 years ago
5 0
2 C2H2 + 5 O2 --> 4 CO2 + 2 H2O

2.35 mol C2H2 - x mol O2
2 mol C2H2 - 5 mol O2

x =  \frac{2.35 \times 5}{2}  = 5.875 \: mol
answer: 5.875 mol
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The mass of a 50-mL volumetric flask is 40.638 g. After adding 15.0 mL of 95% ethanol and adding enough water to complete the vo
Nuetrik [128]

Answer

0.9516 grams / mL (50.00 has 4 sig digs.)

Remark

You have a couple of extraneous numbers there. You don't care about anything except the mass of the flask +  water/alcohol mixture  (88.219 grams). and the mass of the flask (40.638 grams)

Formulas

  • mass water/alcohol mixture = mass of the flask with fluid - mass flask
  • density = mass / volume

Solution

mass water/alcohol mixture = 88.219 - 40.638 = 47.581

  • Volume = 50 mL
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  • Density = 47.581/50
  • Density = 0.95162  There are 4 sig digs so the answer should be
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3 years ago
What occurs when a neutron strikes a stable isotope and causes it to become unstable? A. Energy to mass conversion
Vsevolod [243]

Answer:

Why some elements are radioactive (unstable). When the atoms of an element have extra neutrons or protons it creates extra energy in the nucleus and causes the atom to become unbalanced or unstable. Whether radioactive elements can become stable and if so, how. The unstable nucleus of radioactive atoms emit radiation.

Explanation:

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6 0
3 years ago
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Write the fraction of the mass of kcl produced from 1 g of k2c03​
Minchanka [31]

Mass of KCl= 1.08 g

<h3>Further explanation</h3>

Given

1 g of K₂CO₃

Required

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Solution

Reaction

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mol of K₂CO₃(MW=138 g/mol) :

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From the equation, mol ratio K₂CO₃ : KCl = 1 : 2, so mol KCl :

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Hi :)

The bottom number tells you how many protons you have in the nucleus of this element.

In Krypton-84, this means that you have 84 nucleons, where 36 of these are protons, and the remaining 48 are neutrons.


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iren2701 [21]

The location of the negative charges is evenly distributed throughout the entire atom.

J. J. Tomson concluded that atoms are divisible and that the corpuscles are their building blocks.

Atoms are made up of smaller particles.

J. J. Thomson discovered the electron ( the negative charges of the atom) in 1897.

His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge and evenly distributed throughout the entire atom.

With this model, he abandoned his earlier hypothesis that the atom was composed of immaterial vortices.

Later, Rutherford demonstrate that J.J Thompson's Plum Pudding model was not accurate.

More info about Thomson’s plum pudding model: brainly.com/question/6319700

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