This should be under biology.
To transport the substance inside the cell when the concentration inside the cell is already higher than outside the cell would require active transport because the substance would be moving against its concentration gradient.
Answer: two elements and three atoms
Explanation:
An element is the simplest substance and hence cannot be broken down using chemical reactions.
Magnesium chloride
is an ionic compound formed by the transfer of electrons from element magnesium (Mg) to element chlorine (Cl) where Magmesium forms a cation
by losing two electrons and chlorine forms an anion
by gaining electron.
There are 3 atoms in Magnesium chloride
which include one atom of magnesium (Mg) and two atoms of chlorine (Cl).
Answer:
Equilibrium constant is 0.4
Explanation:
We propose the equilibrium:
PCl₅(g) ⇄ PCl₃(g) + Cl₂(g)
Initially 0.72 mol
We have the 0.72 moles of the PCl₅.
React x x x
X amount has reacted, so in the equilibrium we have:
0.72 - x 0.4 0.4
If we initially have 0.72 moles and we have 0.4 moles at the equilibrium, it means that 0.3 moles has been reacted.
Let's make the expression for Kc:
Kc = [PCl₃] . [Cl₂] / [PCl₅]
Kc = 0.4 . 0.4 / 0.4
Kc = 0.4
Natural selection is is the adjustment of genes throughout generations based on factors that help it survive.
The answer is A