Answer:
Read the text and question. Think about what you have learned and choose the option with the correct answer.
Soy Paul, soy estadounidense y tengo amigos gauchos y managuas. ¡Me encanta tener amigos de muchos países!
Nos gusta jugar a los juegos de mesa los domingos en la tarde. Prefiero jugar con mi amiga de Buenos Aires, Argentina. Mi amiga se llama Leticia y juego con ella porque es atrevida. En la escuela tenemos un grupo de juegos de mesa con otros amigos ticos.
Based on the text and on what you have learned in the lesson, what can be inferred from the text?
Las nacionalidades
Las profesiones
Los días festivos
Los apodos
Explanation:
Answer:
The required flow rate of air in mol/h is 20144 and the percent by mass of oxygen in the product gas is 23,1%.
Explanation:
The air of 9 mole% methane have an average molecular weight of:
And a flow of 700'000g/h÷27,8g/mol = 25180 mol/h
In the reactor where methane solution and air are mixed:
In = Out
Air balance:
91% air×25180 mol/h + 100% air×X = 95%air×(X+25180)
<em>Where X is the flow rate of air in mol/h.</em>
<em>Solving, </em><em>X = 20144 mol air/h</em>
The air in the product gas is:
95%×(20144 + 25180) mol/h = 43058 mol air× 21%O₂ = 9042 mol O₂ ×32g/mol = 289 kg O₂
43058 mol air×29g/mol 1249 kg air
Percent mass of oxygen in the product gas is: =0,231 kg O₂/ kg air* 100 = 23,1%
I hope it helps!
The definition of an exothermic reaction is releasing heat and endothermic reaction is an absorption of heat.
This reaction is exothermic because it releases heat and doesn't absorb it when mixing hydrochloric acid with water.
Answer:
The biology of the ecosystem is always studied from the composition of organisms, population and community.
Explanation:
- In an ecosystem, various processes are sustained and these processes regulate the environment, as the biotic communities in the ecosystem make up the biosphere.
- Various life processes, their interaction, movement, and successional development ecosystem and the distribution of organisms are the focus of biological organization levels of ecology.
- First comes the organism ecology level as the researchers study their adaptations for the structure and physiographic behavior. Second is the population ecology level with a group of interbreeding organisms next level is of Community ecology and ecosystem ecology as they study the different species within the area using a three-dimensional model.
- After these the ecosystem ecology that is an extension of all the levels in the ecosystem. The natural environment can provide all the needed nutrients and life-supporting factors.