Answer:
0.082 M
Explanation:
First we calculate the moles of KOH added, by multiplying its volume and concentration:
- 0.22 M * 16 mL = 3.52 mmol KOH
Given that <em>one mole of acid reacts with one mole of base</em>, in the lactic acid sample there were 3.52 acid moles as well.
Finally we divide the acid moles by the volume, to calculate the concentration:
- 3.52 acid moles / 43 mL = 0.082 M
Answer:- The given ion has 41 protons, 52 neutrons and 38 electrons.
Solution:- Atomic number for Nb is 41 and it's mass number is given as 93.
We know that, atomic number = number of protons
Since the atomic number is 41, it has 41 protons.
For a neutral atom, number of electrons = number of protons
Since the element has +3 charge, It must have lost three electrons to form the ion.
So, the number of electrons for the given ion = 41 - 3 = 38
number of neutrons = mass number - number of protons
number of neutrons = 93 - 41 = 52
So, the given ion has 41 protons, 52 neutrons and 38 electrons.
<span>We can use rocks to determine if the animals from to day have changed from the past.
Rocks also help us know if rivers once flowed through an area.
We use them to find out what type of animals live then that are extinct now.</span>
Answer:
i think keep the same rat i`m not sure
Explanation:
The answer is B diatomic molecule because A diatomic molecule has two atoms. Thediatomic elements are hydrogen, nitrogen,oxygen, fluorine, chlorine, bromine and iodine.