4 because he needed to see
Answer:
3.6124 m/kg
Explanation:
Molality is calculated as moles of solute (mol) divided by kilogram of solvent (kg). Here, we can find these numbers by using the 35.4%, which gives us 35.4 g of H3PO4 and 100 g of solution to work with.
To go from grams to moles for the phosphoric acid, you need to find the molar mass of the compound or element and divide the grams of the compound or element by that molar mass.
Here, the molar mass for phosphoric acid is 97.9952 g/mol. The equation would look like this:
35.4 g x 1 mol / 97.9952 g = 0.3612422 mol
Next, the 100 g of solvent can easily be converted to 0.1 kg of solvent.
To find the molality, divide the moles of solute and kilograms of solution.
0.3612422 mol / 0.1 kg = 3.6124 m/kg
Answer:
Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together. An ion is a positively or negatively charged particle.
1.) NaOH + HCl → NaCl + H₂O
<span>
2.) Ca(OH)</span>₂ <span> + H</span>₂<span>SO4 </span>→<span> CaSO</span>₄ + 2H₂O
<span>
3.) 2HCl +Ba (OH)2 </span>→ <span> BaCl</span>₂ + 2H₂O
<span>
4.) HNO3 + LiOH </span>→ <span> LiNO</span>₃ <span> + H</span>₂O
<span>
5.) H</span>₂CO₃ + NaOH → Na₂CO₃ + H₂O
<span>
6.) KOH + HC</span>₂H₃O₂ → KC₂H₃O₂ <span>+ H</span>₂O
<span>
7.) Ba(OH)2 + HNO2 </span>→<span> Ba(NO</span>₂)₂<span> + H</span>₂O
<span>
8.) H</span>₂<span>SO</span>₃<span> + 2NaOH </span>→<span> Na</span>₂SO₃ <span>+ 2H</span>₂O
<span>
9.) H</span>₃<span>PO</span>₄<span> + 3KOH </span>→<span> K</span>₃PO₄ <span>+ 3H</span>₂O
<span>
10.) 2HBr + Ca(OH)2 </span>→<span> CaBr</span>₂ + 2H₂O
The reason why water is so recurrent is because of the general form that says: ACID + BASE → SALT + WATER
I took the liberty of balancing the equations.
