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2 years ago

What does the prefrontal cortex do? What happens to grey matter in adolescence? What does this mean?

Chemistry

1 answer:

shutvik [7]2 years ago

7 0

Answer:

Adolescence is a time of significant growth and development inside the teenage brain. The main change is that unused connections in the thinking and processing part of your child's brain (called the grey matter) are 'pruned' away. ... The front part of the brain, the prefrontal cortex, is remodelled last.

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Whoever answers correctly I’ll give you a Brainly

Andre45 [30]

Answer:

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Explanation:

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2 years ago

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Which shows the potential energy of particles in three substances, from least to greatest? liquid, solid, gas liquid, gas, solid

AleksandrR [38]

Answer:

Gas liquid solid

Explanation:

gases have a weak potential since they have a weak bond between molecules while in solids it's the strongest making them vibrate in a fixed position

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2 years ago

Which atomic property is different in each isotope of an element?

Valentin [98]

Every isotope of an element has a different number of neutrons, which means that the atomic property which is different in each isotope of an element is mass number.
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3 years ago

An unknown compound contains 38.7 % calcium, 19.9 % phosphorus and 41.2 % oxygen. what is the empirical formula of this compound

Softa [21]

Answer: Ca3(PO4)2

Explanation:

We assume that the sample is 100.0 g.

The sample contains 38.7 g of Ca, 19.9 g of P, and 41.2 g of O as the proportions show.

Then we can calculate the number of moles of each component (n = m/atomic mass).

The number of moles of Ca = 38.7/40.078 = 0.96 mol.

The number of moles of P = 19.9/30.97 = 0.64 mol.

The number of moles of O = 41.2/15.99 = 2.75 mol.

Now, we can get the molar ratios of different components (Ca, P, and O) in the sample by dividing the number of moles of each component by the lower number of moles, that we should divide the number of moles by (0.64).

Ca: P: O = (0.96/0.64) : (0.64/0.64) : (2.75/0.64) = 1.5 : 1 : 4.

To avoid the fraction of the ratios, we can multiply all ratios by 2.0.

Now, the ratio of Ca : P : O will be 3 : 2 : 8.

That main the empirical formula of the compound is Ca3P2O8 which can be expressed as calcium phosphate (Ca3(PO4)2).

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2 years ago

The freezing point of water is 0.00°C at 1 atmosphere. How many grams of nickel(II) sulfate (154.8 g/mol), must be dissolved in

VladimirAG [237]

Answer:

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Explanation:

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3 years ago