C is the right answer hope this is right
Answer:
The moon appears to change forms
Explanation:
As it rotates around Earth, sunlight only hits half of the moon which creates that impression
Answer: use the ideal gas equation, PV = nRT
Explanation:
The ideal gas equation permits you to determine one variable, P, V, n or T, when you know the other two variables.
In this case, your are told you know P, V and T, so you can solve for n:
n = PV / (RT)
Remember this:
R is the universal constant of gases, and you must use the adequate units.
T is the temperature in absolute scales, i.e Kelvin.
b. Na2HPO4 + NaH2PO4.
A <em>buffer </em>is a solution of a weak acid and its conjugate base. The weak acid is H2PO4^(-) and its conjugate base is HPO4^(2-).
All the other options are incorrect because they consist of only a single component.
The preservation of human rights in any part of the world plays a key role in maintaining the peace and liberty of its citizens.