Answer: Earth revolves around the sun in 365 days, 5 hours, 59 minutes and 16 seconds.
Explanation:
Answer:
Layer A is the youngest
It is at the top, it has all of the dinosaur bones which got buried after earth got hit with an asteroid and they went extinct. Layer D started it and all of these years dirt, soil, and fossils have been gathering making each layer before older and older.
I need brainliest to rank up
Explanation:
Answer:
is an assumption , in an idea that is proposed for the sake of argument so that it can be tested to see if it might be true.
아 이거 끝이 없어
A Lewis acid is a substance that can <span>accept a pair of electrons.
</span>A Lewis acid<span> is a substance that contains an empty </span>orbital<span> which can accept an </span>electron pair<span> from a Lewis </span><span>base.
For example b</span>oron trifluoride (BF₃) is trigonal planar molecule and can bind with Lewis base ammonia (NH₃). Other examples are metal cations, <span>acidic compounds hydr</span><span>onium ions.</span>
Answer:
La constante de equilibrio Ka del ácido láctico es 1.38x10⁻⁴.
Explanation:
El ácido láctico es un ácido débil cuya reacción de disociación es la siguiente:
CH₃CHOHCOOH + H₂O ⇄ CH₃CHOHCOO⁻ + H₃O⁺ (1)
0.025M - x x x
La constante de acidez del ácido es:
Sabemos que la concentración del ácido inicial es:
[CH₃CHOHCOOH] = 0.025 M
Y que a partir del pH podemos hallar [H₃O⁺]:
Debido a que el ácido se disocia en agua para producir los iones CH₃CHOHCOO⁻ y H₃O⁺ de igual manera (según la reacción (1)), tenemos:
[CH₃CHOHCOO⁻] = [H₃O⁺] = 1.78x10⁻³ M
Y por esa misma disociación, la concentración del ácido en el equilibrio es:
Entonces, la constante de equilibrio Ka del ácido láctico es:
Espero que te sea de utilidad!