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3 years ago

7

if a solid dissolves into a liquid, what does it mean about the properties of its molecules? Describe what it would look like on

the nanoscale.

1 answer:

expeople1 [14]3 years ago

4 0

Search it on the internet it will tell u

You might be interested in

What heat does to molecules and why

BARSIC [14]

Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

Explanation:

7 0

3 years ago

2. Iron has a density of 7.86 g/cm). A sample of an unknown metal is measured and found to be

alekssr [168]

The volume of sample = 2.25(1.5)(2.25) = 7.59375 cm3
Density = mass / volume
Density = 55.75 / 7.59375 = 7.34156 g/cm3

As the density of iron is 7.86 g/cm3 instead, it is not iron

3 0

3 years ago

Suppose you have been given the task of distilling a mixture of hexane + toluene. Pure hexane has a refractive index of 1.375 an

rosijanka [135]

Answer:

Mole fraction of hexane in your sample is 0,746

Explanation:

Based on the information you can write the following equations:

X + Y = 1 <em>(1)</em>

Where X is mole fraction of hecane and Y is mole fraction of toluene

Also, based on the assumption that the refractive index of the hexane + toluene mixture varies linearly with mole fraction you can write:

1,375X + 1497Y = 1406 <em>(2)</em>

<em></em>

Replacing (1) in (2):

1,375X + 1,497(1-X) = 1,406

1,375X - 1,497X + 1,497 = 1,406

-0,122X = -0,091

X = -0,091/-0,122

X = 0,746

Thus, the <em>mole fraction of hexane in your sample is 0,746</em>

Also you can know the mole fraction of toluene replacing this value in (1):

0,746 - Y = 1

Y = 1-0,746

Y = 0,254

I hope it helps!

4 0

4 years ago

What measurements are used to calculate the density of a given object?

professor190 [17]

Answer:

Density = $\frac{Mass}{Volume}$

Explanation:

Density equals mass divided by volume.

Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).

8 0

3 years ago

Read 2 more answers

Which statement correctly compares barium nitrate (Ba(NO3)2) and scandium nitrate (Sc(NO3)3)?

3241004551 [841]

<h2>D. They contain the same number of elements.</h2>

Explanation:

The formula (Ba(NO3)2) contains 9 atoms.

1 Barium atom (Ba)

Contains 2 NO3 groups -

2 Nitrogen atoms (N) x 2

6 Oxygen atoms (O3) x 2

3 Elements in total

The formula (Sc(NO3)3) contains 13 atoms.

1 Scandium atom (Sc)

Contains 3 NO3 groups -

3 Nitrogen atoms (N) x 3

9 Oxygen atoms (O3) x 3

3 Elements in total

They do not have the same number of atoms.

They do not have the same number of oxygen atoms.

They do not contain the same number of NO3 groups.

They do have the same number of elements.

8 0

4 years ago