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3 years ago

Which one of the following statements is true?

Chemistry

1 answer:

marshall27 [118]3 years ago

6 0

Answer: Option (c) is the correct answer.

Explanation:

A state function is defined as the function of a system which relates to several state variables that depend only on the current equilibrium state of the system.

A state function does not depend on the path followed by the system to reach at its present state.

Enthalpy change is represented by $\Delta H$ and its value depends on state functions like U, P and V. Therefore, change in enthalpy is also a state function.

Value of these functions does not depend on the path taken to reach their values.

Therefore, we can conclude that the statement enthalpy is a state function, is true.

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Write the charge balance for a MgSO 4 and NaNO 3 solution that contains H + , OH − , Mg 2 + , HSO − 4 , SO 2 − 4 , MgHSO + 4 , M

irga5000 [103]

Answer :

$MgSO_4$ solution contains $Mg^{2+}$ and $SO_4^{2-}$

$NaNO_3$ solution contains $Na^{+}$ and $NO_3^{-}$

Explanation :

Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.

All the polyatomic ions always form an ionic compound.

Polyatomic ions : It is a charged species that composed of two or more atoms and these charged species are bonded by the covalent bond.

The given compounds are, $MgSO_4$ and $NaNO_3$

$MgSO_4$ is an ionic compound which is formed by the combination of $Mg^{2+}$ cation and $SO_4^{2-}$ anion.

and,

$NaNO_3$ is an ionic compound which is formed by the combination of $Na^{+}$ cation and $NO_3^{-}$ anion.

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3 years ago

What is the frequency of an electromagnetic wave that has a wavelength of

AlexFokin [52]

Answer:

D. 2.5 x 10 ^-14 Hz

Explanation:

Use wavelength formula: v = f x wavelength

Rearrange formula for frequency.

f = wavelength / v

f = 7.6 x 10 ^-6 / 3.00 x 10 ^8

f = 2.5 x 10^-14 Hz

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Which of the following is a helpful addition to your observations?

Pavlova-9 [17]

The answer to that question would be C

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What is the combined gas law formula ?

Lera25 [3.4K]

P = pressure, V = volume, T = absolute temperature k = constant.

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How does the structure of amino acids allow them to form a polypeptide

melamori03 [73]

<span>Amino acids which are known to be linked by peptide bonds they form polypeptide chains.

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3 years ago