The mantle layer is more dense closest to the core.
Answer:
Blood can carry diseases in it so be careful.
Try to wash your hands before and after helping someone.
Use plastic gloves if you have them.
Cover cuts and scratches on your hands if you don’t have gloves.
Help your friend to deal with the bleeding if she can.
Explanation:
Give her a first aid kid/ as it will have all the supplies in it that are needed, the teacher should get help if it's a serious bleeding.
Answer:
Ksp = 2.4 * 10^-13
Explanation:
Step 1: Data given
Molarity of NaIO3 = 0.10 M
The molar solubility of Pb(IO3)2 = 2.4 * 10^-11 mol/L
Step 2: The initial concentration
NaIO3 = 0.1M
Na+ = 0 M
2IO3- = 0 M
Step 3: The concentration at the equilibrium
All of the NaIO3 will react (0.1M)
At the equilibrium the concentration of NaIO3 = 0 M
The mol ratio is 1:1:1
The concentration of Na+ and IO3- is 0.1 M
Pb(IO3)2 → Pb^2+ + 2IO3^-
The concentration of Pb(IO3)2 can be written as X
The concentration of Pb^2+ can be written as X
The concentration of 2IO3^- can be written as 2X
Ksp = (Pb^2+)(IO3^-)²
⇒ with (Pb^2+) = 2.4*10^-11
⇒ with (IO3^-) = 2x from the Pb(IO3)2 and 0.1M from the NaIO3.
⇒The total (IO3^-) = 2x + 0.1 and we assume that x is so small that we can neglect it.
Ksp = (2.4 *10^-11)*(0.1)²
Ksp = 2.4 * 10^-13
Levels of organisation include,
1. Cells. Its function is in the living organisms and has unit structure which is the smallest. It has certain functions in the organisms. Example include, bone cells, nerve cells, and blood cells.
2. Organs. They are formed with certain tissues which works together and performs specific activity, Example include, skin, heart, and brain.
3. Organ systems. It has one or more organs and they work together in order to perform certain functions in the organisms. Example include, nervous system, skeletal system, and circulatory system.
4. Organisms. They can either take in materials and from food there is energy which is released, reproduced, grow to respond to environment and release waste.
Example include, animal, human, bacteria, amoeba, and mushroom.
1. 4 electrons
2. Ernest Rutherford
3. Discovered the existence of a center of atom
4. 17 protons