Answer:
B. Velocity
Explanation:
The answer is Velocity because the def of velocity is the rate of constant speed in a given direction. I hope this helps, have a good night.
27.8 mg of silver nitrate (AgNO3, 169.9g/mol) was dissolved in water to make 15.00 mL of solution. 8.15 mL of that solution was diluted to make a new solution with a total volume of 1.000L.
Answer:
Dissociated state is the predominant one
Explanation:
When a molecule with pKa of 4.52 is in an aqueous solution at pH = 4.0, follows the H-H equation, thus:
pH = pKa + log₁₀ [A⁻] / [HA]
<em>Where [A⁻] is the dissociated state and [HA] represents the protonated state</em>
Replacing:
4.0 = 5.2 + log₁₀ [A⁻] / [HA]
-1.2 = log₁₀ [A⁻] / [HA]
0.063 = [A⁻] / [HA]
[HA] = 16 [A⁻]
That means you have 16 times more [HA] than [A⁻] and the <em>dissociated state is the predominant one</em>
Answer:
<em><u>B</u></em><em><u> </u></em><em><u>.</u></em><em><u>8</u></em><em><u>0</u></em><em><u>5</u></em><em><u> </u></em><em><u>mL</u></em>
Explanation:
Here, temperature is constant!
so we can use P1V1=P2V2
P1,V1 is pressure and volume in original condition
and P2V2, pressure and volume in new condition!
now, volume is given 900mL(=V1)
standard pressure is 1 atm i.e, 760mmHg(=P1)
pressure increases to 850mmHg(=P2)
now we have,
P1V1=P2V2
i.e, 760mmHg×900mL=850mmHg×V2
i.e, V2={(900×760)/850 } mL
=804.75 mL
≈805mL
✌️:)
First, to convert from C to K, add (C+273)=k
So -25+273=248
