Answer:
plz mark as BRAINLIEST plz
Explanation:
The biotic factors in an ecosystem are the living organisms, such as animals. Biotic factors in an ecosystem are the participants in the food web, and they rely on each other for survival. ... These living organisms affect each other and influence the health of the ecosystem.
Well, in an atom, there are an equal number of protons and electrons so they cancel each other out.
Answer:
102 g Al₂O₃
Explanation:
To find the mass of Al₂O₃, you need to (1) convert grams Al to moles Al (via molar mass), then (2) convert moles Al to moles Al₂O₃ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via molar mass). It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the given values.
Molar Mass (Al): 26.98 g/mol
Molar Mass (Al₂O₃): 101.96 g/mol
4 Al + 3 O₂ ---> 2 Al₂O₃
54.0 g Al 1 mole 2 moles Al₂O₃ 101.96 g
-------------- x ----------------- x ----------------------- x ---------------- = 102 g Al₂O₃
26.98 g 4 moles Al 1 mole
Answer:
a)[H+]=[OH-]= 1.708e-7
b)pH = 6.76
c)pH=13
Explanation:
a) Kw=[H+](OH-)=2.92e-14
As [H+]=[OH-]=take it equal to x
x2=2.92e-14
take squre root on both sides
we get x=1.708e-7=[H+]=[OH-]
b) As we know that pH = -log[H+]
putting the value in above equaton we get
pH= -log[1.708e-7]
pH = 6.76
c) if [OH-]=0.10 M FIND pH
pOH = - log(OH-)
pOH = - log(1e-1)
pOH = 1 but we also know that pH+pOH=14
sp pH=14-pOH
pH=14-1
pH=13
Answer:
C)They are waiting for the best conditions for growth.
Explanation:
Seeds of plants require the best/optimum conditions for growth in order to germinating seed the best chances of survival.
These optimal conditions include;
Presence of Water
Adequate sunlight
Good soil, etc.
When these conditions are not present, some seeds usually stay dormant until favorable conditions are present.
For example, a coconut seed cannot survive or grow in sea/salt water, therefore, it lies dormant floating in the see until favorable conditions such as river tributaries or the seashore where it can germinate is present.
