Answer:
they can be over a short period of time. so true
Explanation:
Answer:
NH3 weak base
HCOOH weak acid
H3PO4 weak acid
NaOH strong base
Explanation:
When talking about the weakness or strength of acid and bases, it is essential to look at it from the base point of ionization or dissociation in solutions. For an acid or base to be termed strong , this means it ionize completely in solution to form hydroxonium ion and hydroxide jobs respectively in water. For an acid or base to be termed weak, it ionizes only partially in solution.
The strength of acid can be accessed from the value of the acid ionization constant Ka. Strong acids like sulphuric acid have a fairly large value for for this constant while weak acids have a relatively low value for this constant. Hence, we must know that the dissociation equation is not enough to say an acid is weak or strong. Acids with higher Ka value are stronger with acids with lower Ka value.
In likewise manner, we have the base dissociation constant. It is the equilibrium constant for a base dissociation reaction. While stronger bases have relatively higher values for Ka, weak bases have a relatively lower value.
Ammonia yields a weak base solution of ammonium hydroxide in water. This makes it a weak acid
Methanoic or Formic acid like most organic acid is a weak acid. It ionizes only partially in solutions.
Phosphoric acid is also a weak acid as it ionizes partially in solutions too.
Lastly, sodium hydroxide is a strong base as it ionizes completely in solution
Protists can be both beneficial and harmful.some protists such ...if some protists live inside the digestive system of animals.
Answer: The correct option is A.
Explanation: Moles of Iron nail can be calculated by using the formula:
...(1)
Given mass of iron nail = 100 g
Molar mass of iron = 56 g/mol
Number of moles of iron nail = 1.79 moles
The chemical equation for the formation of rust if given by:
By Stoichiometry of the reaction,
4 moles of iron reacts with 3 moles of oxygen gas to produce 2 moles of rust.
So, 1.79 moles of iron will react with = = 1.3425 moles of oxygen gas.
For oxygen gas,
Molar mass = 32 g/mol
Mass of oxygen can be calculated by using equation 1, we get
Mass of oxygen gas = 43 grams
Hence, the correct option is a.
The changes in different properties such as concentration etc will change if the pH experiences a change.
<h3>
What is pH?</h3>
This is referred to the power of hydrogen and is a measure of the degree of acidity or alkalinity of a substance.
When pH changes, the concentration as well as other properties in this context.
Read more about pH here brainly.com/question/22390063
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