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3 years ago

Which element, mg or al, will have the higher first ionization energy and which will have the higher third ionization energy?

Chemistry

1 answer:

vesna_86 [32]3 years ago

8 0

Al will have a higher first and third ionization energy

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KBr will undergo dissociation in solution while benzene will undergo solvation.

Degger [83]

Kbr will undergo dissociation in an aqueous solution. But Benzene will not dissolve in water so it will be a solvent.

hoping this help

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3 years ago

Which requires more heat to warm from 22 c to 85 c, 50.0 g of water mor 200. g of aluminum metal?

Yuki888 [10]

Q=mc(change in temp)
Q is amount of heat, m is mass, c is specific heat

Water:
Q= (50.0g)(4.18 J/g°C)(63°C)
Q= 13167J

Aluminum:
Q= (200.0g)(0.900 J/g°C)(63°C)
Q= 11340J

Water requires more heat

7 0

4 years ago

In the lewis structure of ch3oh, how many bonding pairs of electrons are there?

zysi [14]

Answer:
There are five <span>bonding pairs of electrons in Methanol.

Explanation:
Those electron pairs which are being shared between two atoms in molecule are called as bonding pair electrons. While, those electron pairs which are not involved in bond formation and are not shared between two atoms are called as Non-Bonding electron pairs.
In molecule of Methanol as shown below, it can be seen that carbon atom is forming four bonds with three hydrogen atoms and one oxygen atom by sharing four electron pairs and oxygen is forming two bonds, one with carbon atom and one with hydrogen atom. There are two lone pair of electrons present on oxygen atom which are not taking part in and formation.</span>

8 0

4 years ago

How does mass affect thermal energy transfer?

givi [52]

If two objects have the same mass, the object with the higher temperature has greater thermal energy.

8 0

4 years ago

A particular reactant decomposes with a half‑life of 109 s when its initial concentration is 0.280 M. The same reactant decompos

Sophie [7]

Answer:

The order of reaction is 2.

Rate constant is 0.0328 (M s)⁻¹

Explanation:

The rate of a reaction is inversely proportional to the time taken for the reaction.

As we are decreasing the concentration of the reactant the half life is increasing.

a) For zero order reaction: the half life is directly proportional to initial concentration of reactant

b) for first order reaction: the half life is independent of the initial concentration.

c) higher order reaction: The relation between half life and rate of reaction is:

Rate = $\frac{1}{k[A_{0}]^{(n-1)}}$

Half life = $K\frac{1}{[A_{0}]^{(n-1)} }$

$\frac{(halflife_{1})}{(halflife_{2})}=\frac{[A_{2}]^{(n-1)}}{[A_{1}]^{(n-1)} }$

where n = order of reaction

Putting values

$\frac{109}{231}=\frac{[0.132]^{(n-1)}}{[0.280]^{(n-1)}}$

$0.472=(0.472)^{(n-1)}$

Hence n = 2

$halflife=\frac{1}{k[A_{0}]}$

Putting values

$231=\frac{1}{K(0.132)}$

K = 0.0328

4 0

3 years ago