All categories

2 years ago

I NEED A ANSWER FAST PLEASE HELP

Mathematics

1 answer:

NikAS [45]2 years ago

3 0

Answer:

Elevation in boiling point is mathematically expressed as

ΔTb = Kb X m

where Kb = boiling point elevation constant = 2.53°c/m (for benzene)

m = molality of solution = 3.47 m (given)

∴ ΔTb = 2.53 X 3.47

= 8.779 oC

But, boiling point of benzene = 80.1 oC

∴ Boiling point of solution = 88.879 oC

Now, Depression in freezing point = ΔTf = Kf X m

where, Kf = freezing point depression constant = 5.12°c/m (for benzene)

∴ ΔTf = 5.12 X 3.47

= 17.766 oC

But freezing point of benzene = 5.5 oC

∴ Freezing point of solution = -12.266 oC

You might be interested in

How many roots do the functions have in common? f(x)=x^2-4x-5f(x)=x 2 −4x−5

kakasveta [241]

Answer:

They have both root common .

7 0

3 years ago

Find K by evaluating Limit

Lubov Fominskaja [6]

Answer:

Step-by-step explanation:

$\lim_{x \to \infty}\frac{1-cos4x}{1-cos2x}= \lim_{x \to 0} \frac{(1-cos4x)'}{(1-cos2x)'}= \lim_{x \to 0}\frac{4sin4x}{2sin2x}= \lim_{x \to 0}\frac{2*2sin2xcos2x}{sin2x}\\ = \lim_{x \to 0}4cos2x\\ =4$

{L'Hospital's rule}

I hope this helps you

:)

6 0

1 year ago

What is the equation of the midline for the function f (x)? f (t) = 3 cos (x) – 2.5

zaharov [31]

Answer:

y = -2.5

Step-by-step explanation:

For such a problem as this, you can replace all sine or cosine functions with their midline value of 0. Then you have ...

f(x) = 0 -2.5

which simplifies to ...

f(x) = -2.5

You can leave the equation like this, or write it as ...

y = -2.5

_____

Perhaps you can see that the midline is the value of any constant added to a sine or cosine function.

6 0

2 years ago

What does it mean to solve an equation?

Ivanshal [37]

To add, subtract, multiply or divide the number given to get a whole number or an integer

4 0

2 years ago

Plz help this is due today AND NO LINKS OR GROSS PICTURES OR I REPORT

Zina [86]

Answer:

I think its A

Step-by-step explanation:

3 0

2 years ago