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3 years ago

7

Which is not a property of a mineral?

1 answer:

Sedaia [141]3 years ago

6 0

Diffraction is not a property of a mineral

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The _______ of a wave is a measure of the amount of energy it carries

Bumek [7]

The word that best fits is frequency. The sentence is The frequency of a wave is a measure of the amount of energy it carries. There is a direct relationship between frequency and energy of a wave. The constant of proportionality is h, Planck's constant. So, Energy = h * frequency. So, the answer is frequency.<span> Although you should know that wavelength is related to frequency and so it is also a measure of the amount of energy and it should also be other valid answer.</span>

6 0

3 years ago

A cylinder with a movable piston contains 2.00 g of helium, He, at room temperature. More helium was added to the cylinder and t

mr Goodwill [35]

Answer : The mass of helium added to the cylinder was, 1.5 grams

Explanation :

Avogadro's law : It is defined as the volume of gas is directly proportional to the number of moles of gas at constant pressure and temperature.

$V\propto n$

or,

$\frac{V_1}{n_1}=\frac{V_2}{n_2}$

where,

$V_1$ = initial volume of gas = 2.00 L

$V_2$ = final volume of gas = 3.50 L

$n_1$ = initial moles of gas = $\frac{\text{Mass of He}}{\text{Molar mass of He}}=\frac{2.00g}{4g/mol}=0.5mol$

$n_2$ = final temperature of gas = ?

Now put all the given values in the above equation, we get:

$\frac{2.00L}{0.5mol}=\frac{3.50L}{n_2}$

$n_2=0.875mol$

Now we have to calculate the mass of helium were added to the cylinder.

$\text{Mass of He}=\text{Moles of He}\times \text{Molar mass of He}$

$\text{Mass of He}=0.875mol\times 4g/mol=3.5g$

Mass of helium added = 3.5 - 2.00 = 1.5 g

Thus, the mass of helium added to the cylinder was, 1.5 grams

8 0

3 years ago

Is this reversible? “ it was silver in color at start but it burned brightly and formed a white powder after heating.”

NARA [144]

Hey there!

This is not reversible.

We know that this is a chemical change because heat is released (it burned brightly) and it formed a new substance (white powder).

Chemical changes are usually not reversible.

Since this is a chemical change, then this is not reversible.

Hope this helps!

3 0

3 years ago

How do newtons laws relate to egg drop project

Xelga [282]

It can be related to an egg drop because the forces pushing the egg up and down must follow the law

6 0

3 years ago

When transition metal atoms lose electrons to form ions, the electrons come first from the highest filled s atomic orbital. With

kap26 [50]

The atomic number of Fe= 26

The electronic configuration of Fe will be

1s2 2s2 2p6 3s2 3p6 4s2 3d6

When it loses two electrons to form ferrous ion (Fe(II)) the electrons will be loose by 4s orbital first

So the electronic configuration of Fe^+2 ion will be

1s2 2s2 2p6 3s2 3p6 3d6

Hence there are six electrons in 3d orbital of iron dipositive ion

Now the the electrons in 3d orbital will be like:

so there are four unpaired electrons

5 0

3 years ago