When you mix pure water and salt(sodium chloride) you will make a saline solution.
Saline solution with 0.9% concentration is used frequently in the medical field for resuscitation fluid because it will have same molarity with the body fluid, so it won't induce fluid exchange caused by osmosis.
Answer:
3.08 moles of CaF₂ and 3.08 mol of H₂SO₄
Explanation:
In order to produce HF we can assume this chemical reaction:
CaF₂ + H₂SO₄ → CaSO₄ + 2HF
1 mol of calcium fluoride can react to 1 mol of sulfuric acid in order to produce 1 mol of calcium sulfate and 2 moles of HF
In this case, ratio is 2:1 with both reactants. Let's make a rule of three:
2 moles of HF were produced by 1 mol of CaF₂ and 1 mol of H₂SO₄
Then, 6.16 moles of HF must be produced by:
(6.16 . 1) / 2 = 3.08 moles of CaF₂ and 3.08 mol of H₂SO₄
<h3>
Answer:</h3>
An electric current is used to decompose a substance.
<h3>
Explanation:</h3>
Concept tested: Electrolysis
We can answer the question by asking ourselves important questions
First; What is electrolysis?
- Electrolysis refers to the process through which molten or aqueous compound known as electrolytes are decomposed by passing electric current through them.
Second; What are electrolytes?
- Electrolytes are substances in either molten or aqueous form and are good conductors of electric current.
- Electrolytes are good conductors of electric current due to the presence of mobile ions.
Third: What happens during electrolysis?
- Electrolytes are therefore decomposed by passing electric current through them resulting to formation of new elements or molecules.
- For example, when molten sodium chloride is decomposed by passing electric current through it, sodium metal is released at the cathode while chlorine is released at the anode.
Answer:
a molecule always has two or more atoms
Answer:
126g
Explanation:
Data obtained from the question include:
Mole of Fe = 2.5moles
Molar Mass of Fe = 56g/mol
Mass of Fe =?
Number of mole = Mass/Molar Mass
Mass = number of mole x molar Mass
Mass of Fe = 2.25 x 56
Mass of Fe = 126g
Therefore, the mass in 2.25mol of Fe is 126g