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vladimir1956 [14]
3 years ago
15

Suppose the mass spectrum of a hypothetical monatomic element x contains a signal at mass number 13 and another of identical hei

ght at mass number 15.
How many isotopes are present and why
What's the fractional abundance of the isotopes.why?
Chemistry
1 answer:
ArbitrLikvidat [17]3 years ago
4 0
For this case, Only 1 isotope would be present, i.e. the principal element with mass M=13 and then one isotope at mass M+2. <span>We are assuming that the principal element is the one that is the lowest mass - by definition, an isotope is one where there are additional neutrons - hence the mass increases, but the proton count is the same. 


</span>
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Give an example of a predator-prey relationship. Then, identify the predator and prey.
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One example of a predator prey relationship would be a a shark and a fish. The shark is the predator and the fish is the prey. The predator hunts for the prey.
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For each solute, identify the better solvent: water or carbon tetrachloride
Rom4ik [11]

The better solvent for Na₂S (Natrium sulfide)and CH₃OH(methanol): water

The better solvent for C₆H₆(benzene) and Br₂(bromine) : CCl₄

<h3>Further explanation</h3>

In covalent bonds there are differences in electronegativity which causes polarization of the bonds

If the bond in an electron pair is more attracted to one atom, then the covalent bond is polar

This is due to the electron attraction of one atom which is bigger than the other atoms

But the geometrical shape of molecules can make molecules that have polar bonds can be polar or non-polar

The symmetrical shape of the molecule is usually a non-polar molecule

For example on H₂O

This molecule is polar because of the difference in electronegativity where the O atom has a stronger electron attraction when compared to the H atom, so this molecule have positive and negative poles where the negative pole is on the O atom

Polar molecules dissolved in water undergo ionization so they can conduct electricity and are electrolyte,  while non-polar molecules are non-electrolyte.

<em>Polar molecules will dissolve polar molecules and vice versa non-polar molecules can dissolve non-polar molecules. </em>

So water molecules that can be used to test polar and non-polar molecules by dissolving them in water

The size of polarity is usually indicated by the magnitude of the dipole moment

The greater the dipole moment, the more polar the compound is. In non-polar compounds the dipole moment is zero.

water- H₂O is a polar solvent, due to the large electronegativity between O and H atoms, and the shape of the V molecule (asymmetrical)

CCl₄- Carbon tetrachloride is a nonpolar solvent, where C atoms as central and Cl atoms have different electronegativity but because of the symmetrical shape so that the dipole moment is removed and so it is nonpolar

Let see that each of these compounds is polar or non-polar

Na₂S (Natrium sulfide)and CH₃OH(methanol) are ion compounds that can dissolve in polar solvents such as water

C₆H₆(benzene) and Br₂(bromine) are non-polar covalent compounds with symmetrical shapes and do not have free electron pairs that can dissolve in CCl₄

<h3 /><h3>Learn more</h3>

ionic bonding

brainly.com/question/1603987

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brainly.com/question/5008811

Lewis structures

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Keywords : chemical bond, covalen bond, water, electrons, dipole moment

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4 0
3 years ago
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How much work (in JJ) is required to expand the volume of a pump from 0.0 LL to 2.5 LL against an external pressure of 1.1 atmat
stira [4]

Answer:

- 278.85 J  

Explanation:

Given that:

Pressure = 1.1 atm

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The work that takes place in a reaction at constant pressure can be expressed by using the equation:

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Since the volume of the gas is expanded from 0 to 2.5 L when 1.1 atm pressure is applied. Then, the work can be given by the expression:

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W = -1.1 atm ( 2.5 - 0.0) L

W = -1.1 atm (2.5 L)

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Recall that:

1 atm L = 101.4 J

Therefore;

-2.75 atm L = ( -2.75 × 101.4 )J

= -278.85 J  

Thus, the work required at the chemical reaction when the pressure applied is 1.1 atm  = - 278.85 J  

8 0
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Give the symbols of the ions formed when sodium reacts with chlorine
Mademuasel [1]

Answer:

When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation (Na+) and a chloride anion (Cl-), both ions have complete valence shells, and are energetically more stable.

3 0
3 years ago
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