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3 years ago

What is the diffrence between a star and a planet

1 answer:

6 0

A star is a celestial body that produces its own light due to a reaction at its core. There are millions of stars. On the other hand, a planet is a celestial body that has a fixed course, otherwise known as an orbit. The orbit is the pathway that allows the planet to move around a star.

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What mass of glucose (C6H12O6) should be dissolved in 12. 0 kg of water to obtain a solution with a freezing point of -5. 8 ∘C?.

bogdanovich [222]

The mass of glucose solute dissolved in the solution is 6.739 Kg.

Recall that;

ΔT = K m i

ΔT = Freezing point depression

K =Freezing point depression constant = 1.86°C/mol

m = molality of the solution

i = Van't Hoff factor = 1 (molecular solution)

We have to find the freezing point depression from;

Freezing point depression = Freezing point of pure solvent - Freezing point of solution

Freezing point of pure water = 0°C

Freezing point of solution = -5. 8 ∘C

Freezing point depression = 0°C - (-5. 8 ∘C) = 5. 8 ∘C

Now;

m = ΔT/K i

m = 5. 8 ∘C/ 1.86°C/mol × 1

m = 3.12 m

But molality = number of moles of solute/mass of solvent in Kg

Molar mass of solute = 180 g/mol

Let the mass of solute be m

3.12 = m/180/12

3.12 = m/180 × 12

m = 3.12 × 180 × 12

m = 6739 g or 6.739 Kg

Learn more: brainly.com/question/6249935

8 0

2 years ago

Read 2 more answers

?<br> Why does Wickham want revenge on Darcy?

zhenek [66]

To take revenge for not allowing him to take up the living.

8 0

3 years ago

Read 2 more answers

Which of these is NOT a function of dna polymerase

ira [324]

What is the function of DNA polymerase?The main function of DNA polymerase is to synthesize DNA from deoxyribonucleotides, the building blocks of DNA. The DNA copies are created by the pairing of nucleotides to bases present on each strand of the original DNA molecule.

I'm not sure what is not a function of dna polymerase but I know what is

8 0

3 years ago

Why would a person in north america not see the solar eclipse shown here?

sdas [7]

This is so hard to answer.

3 0

3 years ago

The equation

ryzh [129]

Answer:

B. -3

Explanation:

Our equation is: $\frac{24x^2+25x-47}{ax-2} =-8x-3-\frac{53}{ax-2}$ . We see that both sides have a term with denominator ax - 2, so let's add $\frac{53}{ax-2}$ to both sides:

$\frac{24x^2+25x-47}{ax-2} =-8x-3-\frac{53}{ax-2}$

$\frac{24x^2+25x-47}{ax-2}+\frac{53}{ax-2} =-8x-3$

$\frac{24x^2+25x+6}{ax-2}=-8x-3$

Now multiply both sides by ax - 2:

$24x^2+25x+6=(-8x-3)(ax-2)=-8ax^2-3ax+16x+6$

$24x^2+25x+6=(-8a)x^2+(16-3a)x+6$

We essentially want to make the terms on each side match. Look at the coefficient of x² on the left side: it's 24. That means on the right side, it should be 24, as well. Then, set -8a equal to 24:

-8a = 24

a = -3

Thus, the answer is B.

4 0

3 years ago

Read 2 more answers