Answer:
Explanation:
When something is burned, it means that it is <u>reacted with oxygen</u>. Steel wool is made out of iron, which bonds with oxygen atoms to form iron oxide which is solid in this reaction. Since, there are now more solid atoms in the steel wool, it will weigh more than before it was burned.
Hope this helped!
Answer : The volume of NaOH stock solution used should be, 250 ml
Solution :
According to the neutralization law,
![M_1V_1=M_2V_2](https://tex.z-dn.net/?f=M_1V_1%3DM_2V_2)
where,
= molarity of NaOH solution = 0.50 M
= volume of NaOH solution = 3.0 L
= molarity of NaOH stock solution = 6.0 M
= volume of NaOH stock solution = ?
Now put all the given values in the above law, we get the volume of NaOH stock solution.
![(0.50M)\times (3.0L)=(6.0M)\times V_2](https://tex.z-dn.net/?f=%280.50M%29%5Ctimes%20%283.0L%29%3D%286.0M%29%5Ctimes%20V_2)
(1 L = 1000 ml)
Therefore, the volume of NaOH stock solution used should be, 250 ml
Answer:
The student measured the cup and got an incorrect answer
Explanation:
because he was in a rush.
The name for Na2S2O3 would be a medical element/ unit, which is called <span>Sodium thiosulfate. Hope this helped you out.</span>
Explanation:
<h3>Atomic Number and Mass</h3>
Each element has its own unique properties. Each contains a different number of protons and neutrons, giving it its own atomic number and mass number. The atomic number of an element is equal to the number of protons that element contains.