Answer:
Food storage. The food reserves can be drawn upon to ensure good development of a flower stalk and seeds.
Explanation:
Hope this helps!
Answer:
Explanation:
Elements in the same family belong to the same group.
A group on the periodic table is the vertical arrangement of elements. Elements in the same group have the same amount of valence electrons in their outermost shell. We know that the valency of an element dictates its chemical properties. In group I for example, elements here have just a valence electron, this makes group I elements readily lose their electrons to achieve a noble configuration.
Physical properties to an extent also varies and progresses down the group steadily.
This is why elements in the same family are said to generally have similar properties
Solution:
We have to use the Henderson-Hasselbalch equation: for this calculation
Henderson–Hasselbalch equation describes the derivation of pH as a measure of acidity by using pKa, the negative log of the acid dissociation constant in biological and chemical systems. The equation is also useful for estimating the pH of a buffer solution and finding the equilibrium pH in acid-base reaction.
The equation is given by:
Here, [HA] is the molar concentration of the un dissociated weak acid, [A⁻] is the molar concentration (molarity, M) of this acid's conjugate base and pKa is −log10 Ka where Ka is the acid dissociation constant, that is:
pH = pKa + log([A^-]/[HA])
We look up the pKa for acetic acid:
pKa = 4.76
Let x = molarity of AcO^- and y = molarity of AcOH: Then we have the following two equations in two unknowns:
(1) x + y = 0.10 M
and
(2) 4.9 = 4.76 + log(x/y)
Further calcite the value of x and y by algebraic method and get the answer.
Answer:
9.52 kg/mL
Explanation:
Density = mass/ Volume
= 100 kg/ 10.5 mL
= 9.523809524 kg/mL
OR
100 kg = 100 × 10^3 g
》Density = 100 × 10^3 g/ 10.5 mL
= 9523.809524 g/mL