Answer:
Tapegrass.Es una hierba perenne casi completamente bajo el agua con largas y estrechas, de color verde a rojizo,a veces,la cinta-como las hojas que crecen de rizomas.Tapegrass se pueden distinguir de las plantas similares mediante una banda prominente,llamada nervadura central,que recorre el centro de cada hoja.La presencia de espiral,helicoidales tallos de las flores también pueden ayudar a identificar esta planta.Aunque tapegrass fue introducido en el noroeste del Pacífico para los peces y la vida silvestre con fines de hábitat,parece causar ninguno de los problemas asociados con las plantas invasoras introducidas como Eurasia watermilfoil.
Explanation:
Answer:
-411 kj
Explanation:
We solve by using this formula
∆U = ∆Q + ∆W
This formula is the first law of thermodynamics
Change in internal energy U = +241
Heat gained by system Q = 652
Putting the value into the equation
+241 = 652 + W
Workdone = 241 - 652
Workdone = -411 kj
Since work done is negative it means that work was done by the system
Answer:
C
Explanation:
Pb + H2O + O2 => Pb(OH)2
Number of oxygen atom on left = 3
Number of oxygen atom on the right = 2
To balance number of oxygen
Change the coefficient of Pb and H2O to two each
2Pb + 2H2O + O2 => 2Pb(OH)2
The coefficient of Pb and H2O is 2,2
Answer:
Concentric circles
Explanation:
The energy levels are shown as concentric circles around the central nucleus, and the electrons are placed from the inside out. The first two electrons are found in the first energy level, and the third electron is found in the second energy level.