Where does the blood pick up oxygen

Answers

Answer 1

Answer: Blood flows from the heart to the pulmonary artery. The blood then goes from the artery to the lungs where the hemoglobin (found in red blood cells) picks up the oxygen.

Answer 2

Answer: Oxygen enters our body through our lungs. From there, it is carried by lungs and then to the heart. It is from the heart that the oxygenated blood is carried to different parts of the body.

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Helium does not usually react with other substances. Does this mean that helium has no chemical properties? Please explain.

Answers

The electron "shell" (or orbitals) for helium is full with two electrons. It, like hydrogen, follows the duet rule. This means that it is "happy" and not very reactive once it has two elections in its shell. For helium, it is inert (doesn't react, no chemical properties) if it keeps the electrons in its shell. If, however, one were to remove an electron (ionize it) the atom would be helium, as it has 2 protons, but would react with elements that have 1 valence electron in order to get the full shell. This is VERY uncommon simply because it takes a great amount of energy to remove the electron the process is not very useful. The answer to your question is essentially, no like other noble gases, helium does not have chemical properties.

Final answer:

Though helium doesn't usually react with other substances due to its full electron shell, it doesn't mean it lacks chemical properties. Properties like atomic number, atomic mass, density, and reactivity are its chemical properties.

Explanation:

The statement that helium does not usually react with other substances is correct. This is due to helium being a noble gas with a complete set of electrons in its outer shell, making it stable and unlikely to participate in chemical reactions. However, this does not mean it has no chemical properties. Properties such as atomic number, atomic mass, density, and the inability to react or bond with other elements are indeed chemical properties.

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A passenger walks toward the rear of a moving train. Describe her motion as seen from a reference point on the train. Then describe it from a reference point on the ground.

Answers

If the train is moving from Point A to Point B, and this motion we arbitrarily deem "forward", then from the reference point of the train, she will be moving backward. From an external reference point, she will be moving in the same direction as the train, but with a lessened velocity.

Are spider multicellular

Answers

Yes, the only single cell organisms that exist are the cells that make up an organism

if 20.0g of N2 gas has a volume of 0.40L and a pressure of 6.0atm, what is the temperature in degrees celsius?

Answers

Answer:

-232 °C

Explanation:

We can use the Ideal Gas Law and solve for T.

pV = nRT

Data:

m = 20.0 g

p = 6.0 atm

V = 0.40 L

R = 0.082 06 L·atm·K⁻¹mol⁻¹

Calculations:

1. Moles of N₂

$\text{n} = \text{20.0 g} * \frac{\text{1 mol}}{\text{28.01 g}} = \text{0.7140 mol}$

2. Temperature of N₂

$\begin{array} {rcl}pV & = & nRT\n\text{6.0 atm} * \text{0.40 L} & = & \rm\text{0.7140 mol} * 0.08206 \text{ L}\cdot\text{atm}\cdot\text{K}^(-1)\text{mol}^(-1) * T\n2.40&=&0.05859T\text{ K}^(-1)\nT& =& \frac{2.40 }{0.05859\text{ K}^(-1)}\n\n & = & \text{41.0 K}\end{array}$

3. Convert the temperature to Celsius

T = (41.0 - 273.15) °C = -232 °C

Model of the plant cell

Answers

Hey there. I did not build a model for you. Below is a picture of a Plant Cell that you could get some ideas from.

Best Of Luck,

- Ari -

Final answer:

A plant cell is a type of cell found in green plants that is responsible for photosynthesis. It contains a cell wall, chloroplasts, and a central vacuole, which distinguish it from animal cells. Plant cells also include plastids and typically do not have lysosomes or centrosomes.

Explanation:

A plant cell is a type of cell found in green plants that is responsible for performing photosynthesis. It contains various elements that distinguish it from animal cells. Major components include:

Cell Wall: A rigid structure made predominantly of cellulose, which provides protection and structural solidity to the cell.
Chloroplasts: Organelles where photosynthesis occurs, using sunlight to convert carbon dioxide and water into glucose and oxygen.
Central Vacuole: A large organelle filled with water and enzymes that helps in maintaining cell turgor pressure, storage of nutrients and waste products.

Unlike animal cells, plant cells also contain plastids and do not usually have lysosomes or centrosomes.

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Is the direct transfer of heat between objects that touch. * Conduction radiation or convection

Answers

The answer to this question is conduction!

Conduction is heat shared by two objects touching, an example would be a pot on a hot plate. The heat goes through the burner into the pot!

Conduction process of heat conduction. For example, A cold cast iron skillet is placed onto a stovetop. When the stove is turned on, the skillet becomes very hot due to the conduction of heat from the burner to the skillet.

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