Its cells will shrivel as water migrates outward into the soil to try and make the concentration on the inside and outside of the cell equal.
Melting, or the change of physical states, is the change of distance between particles. In solid state, particles are closely packed together. Energy is required to separate them in order to make it become liquid or even gas.
When a substance has a high melting point, it means the intermolecular forces or the chemical bonds are strong and the particles are easily attracted to each other. Therefore, more energy is needed to overcome these forces. A higher temperature could provide such energy.
Elements are combined together by different kinds of bonds. Ionic bonds and metallic bonds are considered to be strong. Ionic compounds (eg. NaCl) and metals tend to have a high melting point. In covalent compounds, molecules are held by weak van der Waals’ force. Thus, covalent compounds (eg. most gases, like CO2) have a low melting point.
Yet, water molecules, which are covalent compounds, have a higher melting point than others. It is because water molecules are polar, which allows hydrogen bonds to form among molecules, keeping them close together. More energy is required to melt ice or boil water than normal covalent compounds.
organ system
The liver, stomach, brain, and blood are all different organs and perform different functions. ... Cells form tissues, and tissues form organs. Organs that fulfill related functions are called organ systems. An organism is made up of interconnected organ systems.
The same
Explanation:
If a liquid substance is transferred to a different container, the volume of the liquid in the new container will remain the same.
The volumes of liquids are fixed and does not change. Wherever they are contained, just like solids, they maintain their constant space.
- Volume is the amount of space occupied by a body.
- Gases do not have fixed volume as they fill their containers and they take up the shape.
- Solids and liquids have a fixed volume.
- They do not change their volume.
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Answer:
C
Explanation:
When the Kb is given, the Henderson-Hasselbalch equation can be used to calculate the pOH of a buffer solution:
pOH = pKb + log ([A⁻] / [HA]) = -log(Kb) + log ([BH+] / [B])
Here, moles can be used in place of the concentration since the pairs listed are both dissolved in 5L, which cancel due to the fraction in the logarithm.
a) pOH = -log(1.8 x 10⁻⁵) + log(1.5/1.0) = 4.92
pH = 14 - pOH = 14 - 4.92 = 9.08
b) pOH = -log(1.8 x 10⁻⁵) + log(1.0/1.5) = 4.57
pH = 14 - pOH = 14 - 4.57 = 9.43
c) pOH = -log(1.7 x 10⁻⁹) + log(1.5/1.0) = 8.95
pH = 14 - pOH = 14 - 8.95 = 5.05
d) pOH = -log(1.7 x 10⁻⁹) + log(1.0/1.5) = 8.59
pH = 14 - pOH = 14 - = 5.41