It means the system absorbs energy from surrounding objects; usually, but not always, involving heat
Answer:
0.257M HNO3
Explanation:
The reaction of HNO3 with Ba(OH)2 is:
2 HNO₃ + Ba(OH)₂ → 2 H₂O + Ba(NO₃)₂
That means 2 moles of HNO3 reacts with 1 mole of Ba(OH)2.
51,3mL of 0.250M Ba(OH)2 are:
0.0513L ₓ (0.250mol / L) = 0.0128moles
Moles of HNO3 are:
0.0128moles Ba(OH)2 ₓ (2 mol HNO3 / 1 mol Ba(OH)2) = 0.0257mol HNO3
As these moles are in 0.100L:
0.0257mol HNO3 / 0.100L = <em>0.257M HNO3</em>
<em />
I hope it helps!
The overall charge will be negative 1
Answer:
The molar concentration of water in water is 55,5 moles/L
Explanation:
In chemistry, concentration refers to the amount of a substance per defined space. Molar concentration refers to moles of solute per liter of solution.
To obtain the molar concentration of water in water you need to know how many moles of water you have in a liter, thus:
1L ×× = <em>55,5 moles/L</em>
<em></em>
I hope it helps!