2 years ago

How do I do this I need answers fast

Chemistry

1 answer:

MA_775_DIABLO [31]2 years ago

7 0

1.8 would be the top Sig fig

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You have 0.5 l of air at 203 k in an expandable container at constant pressure. you heat the container to 273 k. what is the new

Leviafan [203]

0.593 L. V1/T1 = V2/T2

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2 years ago

What is the molality of a solution of water and kcl if the freezing point of the solution is –3mc030-1.jpgc?

Natasha_Volkova [10]

We will use the expression for freezing point depression ∆Tf
∆Tf = i Kf m
Since we know that the freezing point of water is 0 degree Celsius, temperature change ∆Tf is
∆Tf = 0C - (-3°C) = 3°C
and the van't Hoff Factor i is approximately equal to 2 since one molecule of KCl in aqueous solution will produce one K+ ion and one Cl- ion:
KCl → K+ + Cl-
Therefore, the molality m of the solution can be calculated as
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m = 3 / (2 * 1.86)
m = 0.80 molal

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3 years ago

What is Charles’s law? State the definition of the law in words. What are the assumptions of Charles’s law? Write mathematical e

Leviafan [203]

Answer:

The volume of a given mas of a gas is directly proportional to the temperature if the pressure remains constant

V is directly proportional to T

V=1/T

V=constant/T

Explanation:

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2 years ago

titration 25.0 ml of 3.4 x 10^ -3 M of Ba(OH) Neutralize 16.6 mL of HCL solution. What is the molarity of HCL solution?

marusya05 [52]

What we are give: Concentration of base (CB) = 3.4 × $10^{-3}$
Then convert all volume in ml to L.
Volume of base (VB) 25.0ml = 0.025L
Volume of acid (VA) 16.6ml = 0.0166L
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Make 'CA' the subject then solve.
CA= $\frac{CBVB}{VA}$

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2 years ago

What is sodium Critate

Alla [95]

Sodium citrate is obtained by mixing citric acid with hydroxide or some other sodium salt.so sodium citrate is by definition is a type of salt

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3 years ago