Which body changes occur after an individual has become an adult?

How many electrons are in the nucleus of an aluminum atom?

DaniilM [7]

Answer:

13

Explanation:

4 0

2 years ago

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Make notes on why did the levels of carbon dioxide in the atmosphere decrease?

kykrilka [37]

Answer:

Carbon dioxide is a very soluble gas. It dissolves readily in water. As the oceans formed, carbon dioxide dissolved to form soluble carbonate compounds so its amount in the atmosphere decreased. Carbonate compounds were then precipitated as sedimentary rocks, eg limestone.

Uptake by living organisms

Carbon dioxide was also absorbed from the oceans into photosynthetic algae and plants. Many of these organisms, and the simple organisms in the food chains that they supported were turned into fossil fuels, eg crude oil, coal and natural gas, which all contain carbon.

Coal is a fossil fuel which was formed from trees which were in dense forests in low-lying wetland areas. Flooding caused the wood from these forests to be buried in a way that prevented oxidation taking place. Compression and heating over millions of years turned the wood into coal.

Crude oil and natural gas were formed from simple plants and tiny animals which were living in oceans and lakes. These small organisms died and their remains sank to the bottom where they were buried under sediments. The lack of oxygen prevented oxidation from occurring.

Over millions of years, heat and pressure turned the remains of the organisms into crude oil and natural gas. Natural gas contains the smallest molecules and is often found on top of crude oil, trapped under sedimentary rock.

Hope this helps..Pls mark as Brainliest!!

5 0

3 years ago

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At a town meeting, your government officials announce that the local landfill is running out of room and that it will be some ti

Elza [17]

Answer:

Here are some possible answers:

Expand the recycling program to include all recyclable materials, and offer residents a reward for recycling.

Ask residents to compost food waste.

Decrease the amount of snail mail, and switch to electronic correspondence when possible.

4 0

3 years ago

A solution of Cuso, is labelled 1.743 M. How much Cuso, in grams, must be used to make

zepelin [54]

Answer:

Option A. 416.1 g.

Explanation:

Data obtained from the question include the following:

Molarity = 1.743 M

Volume = 1.4957 L

Mass of CuSO4 =..?

Next, we shall determine mole of CuSO4 present in the solution.

This is illustrated below:

Molarity is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:

Molarity = mole /Volume

With the above formula, we can obtain the mole CuSO4 present in the solution as follow:

Molarity = 1.743 M

Volume = 1.4957 L

Mole of CuSO4 =..?

Molarity = mole /Volume

1.743 = mole of CuSO4 /1.4957

Cross multiply

Mole of CuSO4 = 1.743 x 1.4957

Mole of CuSO4 = 2.607 moles

Finally, we shall convert 2.607 moles of CuSO4 to grams.

This can be obtained as follow:

Molar mass of CuSO4 = 63.55 + 32.06 + (16x4) = 159.61 g/m

Mole of CuSO4 = 2.607 moles

Mass of CuSO4 =..?

Mole = mass /molar mass

2.607 = mass of CuSO4 /159.61

Cross multiply

Mass of CuSO4 = 2.607 x 159.61

Mass of CuSO4 = 416.1 g

Therefore, 416.1 g of CuSO4 is needed to prepare the solution.

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2 years ago

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A 1.81 mol sample of Xe gas is confined in a 42.6 liter container at 14.1 °C.

zvonat [6]

The pressure of the xenon gas will increase if the number of moles increases because as more molecules are in the container, the molecules hit the container of the wall more often (option C).

<h3>What is an ideal gas?</h3>

Ideal gas is a hypothetical gas, whose molecules exhibit no interaction, and undergo elastic collision with each other and with the walls of the container.

According to this question, a 1.81 mol sample of Xenon gas is confined in a 42.6 liter container at 14.1 °C. If the amount of gas is increased to 2.72 mol, holding the volume and temperature constant, the pressure will increase.

An increase in the number of gas molecules, while container volume stays constant causes the pressure to increase due to the fact that the molecules will collide more with the walls of the container.

Learn more about ideal gases at: brainly.com/question/28257995

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4 0

1 year ago