Answer:
picks up O2 and releases CO2
Explanation:
The pulmonary artery represents a structure within pulmonary circulation that is responsible for carrying deoxygenated blood to the lung.
When blood from the pulmonary artery reaches the long, it becomes oxygenated an in return, the CO2 it carries is released into the lung in a process otherwise known as gaseous exchange.
What happens to the blood that reaches the lungs from the pulmonary artery? The blood that reaches the lungs from the pulmonary artery picks up O2 and releases CO2. The rest of the choices do not answer the question above.
B ratio that describes the amount of solvent or solution divided by the amount of solute
C ratio that describes the mass of solute divided by the mass of solvent
D ratio that describes the amount of solvent in a solution
2 Which contributes to the dissolution of sugar in water?
A the dissociation of an ionic compound in water
B a strong pull of water molecules on an ionic compound
C the dissociation of a polar covalent compound in water
D a strong pull of water molecules on a polar covalent compound
These are two questions and two answers.
Question 1: Which best defines concentration?
Answer: option A, ratio that describes the amount of solute divided by the amount of solvent or solution
Explanation:
There are many different measures of concentration: percent, molarity, molality, mole fraction are some examples.
All of them express the ratio of solute to solvent or solution, in different kind of units, may be mass, number of moles, or volume.
Molarity is number of moles of solute per liter of solution. Molality is number of moles of solute per kg of solvent.
So, as you see it is always a ratio of the amound of solute, but it is not a fixed unit.
Question 2. Which contributes to the dissolution of sugar in water?
Answer: option D, a strong pull of water molecules on a polar covalent compound.
Explanation:
Sugar is not a ionic compound so it does not dissociate.
Sugar is a molecule, so it remains as such in solution.
Sugar is polar, so it can be dissolved in water that is a polar solvent (like dissolve like, is the rule).
The dissolution is explained by the fact that the pull exerted by the molecultes of solvent on the molecules of solute, is greater than the pull that the molecules of solute extert among themselves.
That permits the molecules of solvent surround the molecules of solute and get them appart of the solid substance to form the aqueous solution.
Concentration is the ratio that describes the amount of solute divided by the amount of solvent or solution; option A
The dissociation of sugar in water is due to a strong pull of water molecules on a polar covalent compound; option D
Concentration of a solution is the amount of solute present in a given volume of solution.
Thus, concentration is the ratio that describes the amount of solute divided by the amount of solvent or solution.
The dissolution of sugar in water forms a sugar solution.
Sugar is a polar covalent molecule. The dissociation of sugar in water is due to a strong pull of water molecules on a polar covalent compound.
Learn more about polar compounds at: brainly.com/question/1433127
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b. The reaction always spends equal time in the forward and reverse direction.
c. There is equal processing for the concentration of reactants and products.
d. The reaction could spend more time in the reverse direction than in the forward direction.
The statement that is untrue concerning a reversible reaction is The reaction always spends equal time in the forward and reverse direction. The answer is letter B. The reset of the statements are true concerning the reversible reaction.
B) increased : short period
C) decreased : long period
D) increased : long period
E) unaffected : long period
Answer:
Increased:long period
Explanation:
your welcome:)
Slow receptors, which respond to stimuli over longer durations, are more likely to have a cumulative or 'summation' effect. The likelihood of this summation increases with the length of time required for the responses to decay. This mechanism plays a critical role in cognitive functions such as learning and memory.
In the context of neuronal signaling, when we speak about slow receptors, we are referring to those that respond to stimuli at a slower pace, often due to a longer duration of transmitter binding, and therefore have a higher likelihood of summation compared to the fast receptors.
The concept of summation refers to the cumulative effect of a series of neural responses that take time to diminish. In this case, the likelihood of summation is increased by the long period of time required for those responses to decay. Thus, the correct answer to your question would be option D) increased : long period. This is because the longer the responses take to decay, the more likely they are to accumulate or summate.
It is also important to note that this process significantly contributes to the cognitive functions of the brain, such as memory and learning by facilitating the creation of long term potentiation within neural networks.
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The volume occupied by 454 grams of copper, given a density of 8.92g/mL, can be calculated using the formula for density (Density = Mass / Volume). When rearranged to find volume (Volume = Mass / Density) and substituting the given values, the volume occupied is approximately 50.9 mL.
When calculating volume in chemistry, we use the formula for density, which is: Density = Mass / Volume. In this case, the given values are mass (454g) and density (8.92g/mL). If we rearrange the formula to solve the volume, we get: Volume = Mass / Density. So, if we substitute the given values into the equation, we obtain: Volume = 454g / 8.92g/mL. In performing the operation, we get approximately 50.9 mL. Hence 454 grams of copper occupy 50.9 mL of volume.
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In a gas, the particles are evenly spaced out and not in any particular order. There is no regular arrangement of liquid next to one another. Solids are regularly arranged and closely packed.
They can be compressed a lot (particles are widely spaced). Matter exists in three different states: solid, liquid, and gas.
By examining the configuration of their particles, it is possible to understand why they have various qualities.
A solid is a condition of matter that, even when unconstrained, keeps its shape and density.
A liquid is a nearly incompressible fluid with a (almost) constant volume regardless of pressure that adapts to the shape of its container.
A sample of matter that assumes the shape of the container it is stored in and develops a consistent density inside the container is referred to as a gas.
Therefore, the arrangements of individual particles in solids, liquids, and gases is different.
Learn more about solids, liquids, and gases here:
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