You first need to write the balanced chemical reaction for what is going on.
Ca(OH)₂+2HCl→2H₂O+CaCl₂
After you make the balanced chemical reaction, First you find the moles of HCl used. To do this multiply 0.0375L by 0.124M to get 0.00465mol HCl. Then you multiply 0.00465mol HCl by (1mol Ca(OH)₂)/(2mol HCl) to get 0.002325mol Ca(OH)₂. Finally to find concentration of Ca(OH)₂ used you divide 0.002325mol by 0.020L to get 0.116M Ca(OH)₂.
Therefore the concentration of the unknown solution of Ca(OH)₂ was 0.116M.
I hope this helps. Let me know if anything is unclear.
Answer:
Option b (V1/T1 = V2/T2) is the right alternative or the new volume will be "0.048 L".
Explanation:
The given values are:
Temperature,
T₁ = 25°C
or,
= 298.15 K
T₂ = 50°C
or,
= 323.15 K
Volume,
V₁ = 45 mL
or,
= 0.045 L
V₂ = ?
As we know,
⇒
Or,
⇒
On substituting the values, we get
⇒
⇒
⇒
It b because To have unbalanced forces means that the force applied in one direction is greater than the force applied in the opposite direction. When unbalanced forces are acting on an object, there is a change in speed and/or direction.
Answer:
I believe its the 4th one. He goes to give Romeo the message but before he is able to, Balthasar tells Romeo that Juliet is dead. Friar John just wasn't there in time.