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White raven [17]
3 years ago
14

3. ¿Cuál de las siguientes operaciones es correcta para calcular el número de moles de hidrógeno necesarios para producir 6 mole

s de NH3 según la siguiente ecuación? 3H2+N2-> 2NH3 pliss necesito ayuda :(
a)6molesNH3 x2molesNH3 /3molesH2
b) 6molesNH3 x3molesNH3 /2molesH2
c)6molesNH3 x3molesH2 /2molesNH3
d) 6 moles NH3 x 2 moles H2 / 3 moles NH3
Chemistry
1 answer:
Aloiza [94]3 years ago
4 0

Answer:

the answer is d that is 6×2/3

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State one medical use of radioactive isotopes
Korvikt [17]

Answer:

Radioactive isotopes are widely used in medical field

Explanation:

Radioactive isotopes are widely used in medical field.

Radiations emitted by radioactive isotopes or used to kill the microorganism in food and to increase the shelf life of food.

Cobalt-60 is used to treat the cancer.

Iodine-131 is used to check the activity of thyroid.

Technetium-99 also used for the thyroid.

Phosphorus-32 is used to detect the cancer specially in skin and eyes.

Xenon-133 is used for lungs imaging.

Au-198 is used to diagnose the liver disease.

Co-60 is used as gamma ray irradiation of tumor.

In industry radioactive isotopes are used to measure the thickness of materials.

5 0
3 years ago
Which parts (postulates) of Dalton's atomic theory has been modified in light of later discoveries
professor190 [17]

Explanation:

1) Atoms can not be subdivided. It has been changed as it is possible to divide an atom into Protons, Neutrons and Electrons as well as other smaller particles.

2) The regulations for the chemical mixture have always been altered to the rules for the chemical combination in the creation of organic compounds may be denied.

3)Atoms are of a particular element are identical in all respects i. e. they have same mass and similar properties.

It was modified. And according. to new search;

Atoms of the same element may not be always identical.

8 0
3 years ago
A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and fil
Flura [38]

Answer:  Molarity of Cl^- anions in the chemist's solution is 0.0104 M

Explanation:

Molarity : It is defined as the number of moles of solute present per liter of the solution.

Formula used :

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.049g}{95g/mol}=5.2\times 10^{-4}moles  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

Molarity=\frac{5.2\times 10^{-4}moles\times 1000}{100ml}=5.2\times 10^{-3}mole/L

Therefore, the molarity of solution will be 5.2\times 10^{-3}mole/L

MgCl_2\rightarrow Mg^{2+}+2Cl^-

As 1 mole of MgCl_2 gives 2 moles of Cl^-

Thus 5.2\times 10^{-3}  moles of MgCl_2 gives =\frac{2}{1}\times 5.2\times 10^{-3}=0.0104

Thus the molarity of Cl^- anions in the chemist's solution is 0.0104 M

6 0
3 years ago
Choose the molecule with the strongest internal bond, (intra-, not intermolecular bond) ​
Verdich [7]

Answer:

A

Explanation:

The molecule with the strongest intramolecular bond is HF. Hydrogen fluoride is the answer due to the strong and highly electronegative nature of Fluorine.

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  • When it combines with other substances, due to its electronegative property, it draws most of the electrons closest to itself in the bond.
  • This tendency and ability makes the shared electrons closer the fluorine in the bond.
  • The strong polarization that ensues confers a very strong covalent bond pair on the bond formed.
6 0
2 years ago
What kind of change results in a new substance being produced
tatiyna
Chemical change creates a new substance
3 0
3 years ago
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