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Oliga [24]
3 years ago
8

A key to gas exchange is that both CO₂ and O₂ flow along their respective concentration gradients (from high concentrations to l

ow concentrations). An important consideration to how efficiently gas exchange can occur is the relative concentration of environmental oxygen to the oxygen in the tissues. __________ is true.
Chemistry
1 answer:
maksim [4K]3 years ago
6 0

Answer:

this is true about respiration (inhalation and exhalation)

Explanation:

inhalation is the exchange of gas from the environmental oxygen to the oxygen in the tissues.

while Exhalation is the gas exchange of CO2 with O2 (the CO2 is exhales from high concentration to the environment of low concentration.

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Water containing large amounts of Mg2+and Ca2+ions is said to be hard because it is hard to make soap lather in the water. True
mafiozo [28]

Answer:True

Explanation:

Water is said to be hard when it contains calcium ions or magnesium ions dissolved in it. These ions are able to react with soap in such a way that the soap is prevented from forming lather with the water. Hard water occurs when water passes over calcium or magnesium bearing minerals and dissolves some of it. Hardness due to the presence of calcium ions can easily be removed by boiling the water.

8 0
3 years ago
A hiker has packed a bag of chips as a snack. At the start of the hike the pressure was 1.5 atm and the temperature was 35*C. At
Mazyrski [523]
According to <span>Gay-Lussac's Law the temperature and Pressure are directly proportional to each other if the amount and volume of given gas are kept constant.
Mathematically for initial and final states it is expressed as,

                                          P</span>₁ / T₁  =  P₂ / T₂     ----- (1)
Data Given;
                  P₁  =  1.5 atm

                  T₁  =  35 °C + 273  =  308 K

                  P₂  =  ?

                  T₂  =  0 °C + 273  =  273 K

Solving Eq. 1 for P₂,

                                   P₂  =  P₁ T₂ / T₁

Putting values,
                                   P₂  =  (1.5 atm × 273 K) ÷ 308 K

                                   P₂  =  1.32 atm
Result:
           As the temperature is decreased so the pressure also decreases from 1.5 atm to 1.32 atm. Therefore the bag will contract.
5 0
3 years ago
Look at the graph below.
trapecia [35]

The Answer you're looking for here is Star A mainly because it's the star with the highest Surface Temperature on the Graph.

8 0
3 years ago
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What is a feed back loop?
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Answer:A feedback loop is a process in which the outputs of a system are circled back and used as inputs. In business, this refers to the process of using customer or employee feedback (the outputs of a service or product), to create a better product or workplace

Explanation: Becuz ur mom

8 0
3 years ago
Thread-like structures that are found in the nucleus of a cell that contains all DNA.
lbvjy [14]
I think the awnser is C chromosomes
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