Is Potassium Acetate an acidic or basic salt?

1 answer:

8 0

Cause potassium comes from strong base and acetate comes from weak acid, when they disociate potassium is stronger base or weaker conjugated acid than acetate is cause acetate is weaker acid or stronger conjugated base... i hope you can get it from this what i wrote

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How many molecules of NH3 are produced from 4.72x10 negative 4 power g of H2?

Delvig [45]

<span>9.40x10^19 molecules.
The balanced equation for ammonia is:
N2 + 3H2 ==> 2NH3
So for every 3 moles of hydrogen gas, 2 moles of ammonia is produced. So let's calculate the molar mass of hydrogen and ammonia, starting with the respective atomic weights:
Atomic weight nitrogen = 14.0067
Atomic weight hydrogen = 1.00794

Molar mass H2 = 2 * 1.00794 = 2.01588 g/mol
Molar mass NH3 = 14.0067 + 3 * 1.00794 = 17.03052 g/mol

Moles H2 = 4.72 x 10^-4 g / 2.01588 g/mol = 2.34140921086573x10^-4 mol
Moles NH3 = 2.34140921086573x10^-4 mol * (2/3) = 1.56094x10^-4 mol

Now to convert from moles to molecules, just multiply by Avogadro's number: 1.56094x10^-4 * 6.0221409x10^23 = 9.400197448261x10^19
Rounding to 3 significant figures gives 9.40x10^19 molecules.</span>

7 0

3 years ago

Jf,fyu,eudyj,yudu.kjm,fj

dalvyx [7]

Answer:

Yes that is correct

Explanation:

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8 0

3 years ago

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What is the measurement?

Lady bird [3.3K]

Pretty sure it's 5.25Explanation:

3 0

3 years ago

What is a the volume of a salt crystal measuring 3.22 x 10^-2 cm by 1.5 x 10^-4 cm by 4.30 x 10^-3 cm?

aleksandr82 [10.1K]

Dimension of the salt crystal is:

Length = 3.22 x 10^-2 cm

Breadth = 1.5 x 10^-4 cm

Height = 4.30 x 10^-3 cm

So it is cuboidal in shape.

Volume = L × B × H

$V = 3.22 \times {10}^{ - 2} \times 1.5 \times {10}^{ - 4} \times 4.30 \times {10}^{ - 3} \\ \\ V = 3.22 \times 1.5 \times 4.30 \times {10}^{ (- 2 - 3 - 4)} \\ \\ V = 20.769\times {10}^{ - 9} \\ \\ V = 2.0769 \times {10}^{ - 8} \\ \\ V \approx 2.1 \times {10}^{ - 8} \: {cm}^{3} \\ \\ \boxed{ \red{ \bold{answer: a}}}$

5 0

3 years ago

Which type of orbital will be occupied by the electrons of highest energy for the Si^4+ ground-state ion? 1. 2s 2. 3p 3. 4s 4. 4

Shtirlitz [24]

Answer: Option (5) is the correct answer.

Explanation:

It is known that the ground state electronic configuration of silicon is $[Ne]3s^{2}3p^{2}$ .

And, we know that when an atom tends to gain an electron then it acquires a negative charge and when an atom tends to lose an electron then it acquires a positive charge.

As $Si^{4+}$ has a +4 charge which means that it has lost 4 electrons. Hence, the electronic configuration of $Si^{4+}$ is $1s^{2}2s^{2}2p^{6}$ .

According to the Aufbau principle, in the ground state of an atom or ion the electrons fill atomic orbitals of the lowest energy levels first, before filling the higher energy levels.

As 2p orbital is filled after the filling of 2s orbital.

Therefore, we can conclude that 2p orbital will be occupied by the electrons of highest energy for the $Si^{4+}$ ground-state ion.

4 0

3 years ago