Helium at room temperature is Gaseous
hope that helps
Answer is: <span>the coefficient of phosphoric acid is 12.
</span>Chemical reaction: P₄S₃ + NO₃⁻ + H⁺ → H₃PO₄ + SO₄⁻ + NO.
Reduction half reaction: NO₃⁻ + 4H⁺ + 3e⁻ → NO + 2H₂O /·38
Oxidation half reaction: P₄S₃ + 28H₂O → 4H₃PO₄ + 3SO₄²⁻ + 44H⁺ + 38e⁻ /·3.
38NO₃⁻ + 152H⁺ + 3P₄S₃ + 84H₂O → 38NO + 76H₂O + 12H₃PO₄ + 9SO₄²⁻ + 132H⁺.
Balnced chemical reaction:
3P₄S₃ + 38NO₃⁻ + 20H⁺ + 8H₂O → 12H₃PO₄ + 9SO₄²⁻ + 38NO.
Suelo, grava, bolas de algodón, material de desecho, carbón, arena y astillas de madera.
Suelo, grava, bolas de algodón, material de desecho, carbón vegetal, arena y astillas de madera son los materiales extraídos del medio ambiente que nos permiten mejorar el filtrado del agua porque estos materiales filtran las partículas de polvo así como otras impurezas del agua y hacen que el agua sea potable.
La arena y la grava se consideran buenos filtros de agua porque forman capas permeables que filtran el agua. El agua puede pasar lentamente a través de estas capas permeables y la mayoría de las partículas de suciedad quedan atrapadas, por lo que podemos concluir que los materiales anteriores pueden usarse como filtros de agua.
Learn more: brainly.com/question/24960260
Answer:
Chromium
Explanation:
Cr has 24 atomic number and mass number 52
<u>Answer:</u> The molarity of
solution is 0.34 M.
<u>Explanation:</u>
- To calculate the number of moles, we use the equation:
![\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20moles%7D%3D%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%7BMolar%20mass%7D%7D)
<u>For lead chloride:</u>
Given mass of lead chloride = 18.86 g
Molar mass of lead chloride = 278.1 g/mol
Putting values in above equation, we get:
![\text{Moles of lead chloride}=\frac{18.86g}{278.1g/mol}=0.068mol](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%20lead%20chloride%7D%3D%5Cfrac%7B18.86g%7D%7B278.1g%2Fmol%7D%3D0.068mol)
- For the balanced chemical equation:
![Pb(NO_3)_2+2NaCl\rightarrow PbCl_2+2NaNO_3](https://tex.z-dn.net/?f=Pb%28NO_3%29_2%2B2NaCl%5Crightarrow%20PbCl_2%2B2NaNO_3)
By Stoichiometry of the reaction:
1 mole of lead chloride is formed by 1 mole of lead nitrate
So, 0.068 moles of lead chloride will be formed from =
of lead nitrate
- To calculate the molarity of solution, we use the equation:
![\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}](https://tex.z-dn.net/?f=%5Ctext%7BMolarity%20of%20the%20solution%7D%3D%5Cfrac%7B%5Ctext%7BMoles%20of%20solute%7D%7D%7B%5Ctext%7BVolume%20of%20solution%20%28in%20L%29%7D%7D)
We are given:
Volume of solution = 200 mL = 0.200 L (Conversion factor: 1 L = 1000 mL)
Moles of lead nitrate = 0.068 moles
Putting values in above equation, we get:
![\text{Molarity of }Pb(NO_3)_2\text{ solution}=\frac{0.068mol}{0.065L}\\\\\text{Molarity of }Pb(NO_3)_2\text{ solution}=0.34M](https://tex.z-dn.net/?f=%5Ctext%7BMolarity%20of%20%7DPb%28NO_3%29_2%5Ctext%7B%20solution%7D%3D%5Cfrac%7B0.068mol%7D%7B0.065L%7D%5C%5C%5C%5C%5Ctext%7BMolarity%20of%20%7DPb%28NO_3%29_2%5Ctext%7B%20solution%7D%3D0.34M)
Hence, the molarity of
solution is 0.34 M.