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2 years ago

I need a bit of help on this I kinda forgot about this lesson

Chemistry

2 answers:

MArishka [77]2 years ago

6 0

The Answer is A. Is that correct? Hope this Helps.

Softa [21]2 years ago

3 0

A is correct because the fruit salad can be easily separated and the puch cannot so it is a solution and the fruit salad is a mixture.

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Why are xrays used to probe the crystal structure of a material

ioda

Answer:

Because X-rays have wavelengths similar to the size of atoms

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1 year ago

What kind of sport do you have interest the most and explain why? <br>

lidiya [134]

Answer

Gymnastics

Explanation:

for the simple fact that they do cool stuff

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2 years ago

Calculate the molecular weight of a substance. In which the solution of this substance in the water has a concentration of 7 per

Eduardwww [97]

Answer : The molecular weight of a substance is 157.3 g/mol

Explanation :

As we are given that 7 % by weight that means 7 grams of solute present in 100 grams of solution.

Mass of solute = 7 g

Mass of solution = 100 g

Mass of solvent = 100 - 7 = 93 g

Formula used :

$\Delta T_f=i\times K_f\times m\\\\T_f^o-T_f=k_f\times\frac{\text{Mass of substance(solute)}\times 1000}{\text{Molar mass of substance(solute)}\times \text{Mass of water(solvent)}}$

where,

$\Delta T_f$ = change in freezing point

$T_f^o$ = temperature of pure water = $0^oC$

$T_f$ = temperature of solution = $-0.89^oC$

$K_f$ = freezing point constant of water = $1.86^oC/m$

m = molality

Now put all the given values in this formula, we get

$(0-(-0.89))^oC=1.86^oC/m\times \frac{7g\times 1000}{\text{Molar mass of substance(solute)}\times 93g}$

$\text{Molar mass of substance(solute)}=157.3g/mol$

Therefore, the molecular weight of a substance is 157.3 g/mol

7 0

2 years ago

HCL ejercicio de química

marin [14]

What I can’t understand I’m American

5 0

2 years ago

Read 2 more answers

How do a strong electrolyte, weak electrolyte, and non-electrolyte differ in the number of ions each produces when dissolved in

Dmitrij [34]

Strong electrolytes are completely ionised in solution.
Weak ones are only partially ionised.
Non electrolytes do not form ions

3 0

2 years ago