1. Tilt
2. Revolution - The Earth revolves around the Sun.
3. The North pole always point in the same direction.
Hope it helps.
Answer:
Explanation:
Potassium iodide reacts with oxygen in presence of water to produce potassium hydroxide and potassium diiodoiodate(I) .
5KI + 2H₂O + O₂ =4 KOH + I₂ + K(II₂) .
Answer:
Under the earth's surface, rocks melt, metamorphize, and crystalize.
Explanation:
Metamorphic and Igneous rocks are basically dependant on the heat/pressure of the environment under the surface :) Melting, metamorphosing and crystallization all occur under earth's surface.
Answer:
a) element
b) compound
c) element
d) compound
Explanation:
a) Hydrogen is the chemical element with the symbol H; is the lightest element in the periodic table.
b) Water: It is a substance whose molecule is composed of two atoms of hydrogen and one of oxygen.
⇒ molecular formula: H2O
c) gold: is the chemical element with the symbol Au. It is a very dense, soft and intense yellow metal.
d) sugar: it is a compound whose chemical formula is C12H22O11
Answer: The pH at the equivalence point for the titration will be 0.65.
Solution:
Let the concentration of be x
Initial concentration of , c = 0.230 M
at eq'm c-x x x
Expression of :
Since ,methyl-amine is a weak base,c>>x so .
Solving for x, we get:
Given, HCl with 0.230 M , it dissociates fully in water which means = 0.230 M
will result in neutral solution, since
Remaining after neutralizing ions
The pH at the equivalence point for the titration will be 0.65.