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3 years ago

Which of the following is an example of a physical change in matter?

Chemistry

2 answers:

sineoko [7]3 years ago

5 0

Answer is B.

Explanation:

A physical change is one in which there is no change in chemical composition of a substance. while a process in which there is change in chemical composition it is called a chemical change.

dsp733 years ago

5 0

b. bending of sodium metal because it is still sodium metal just bent

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What is the charge on every atom? why is this the charge

inn [45]

Protons, neutron, and elecrons

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3 years ago

For which of the following reactions does Kc = Kp?

Julli [10]

None of the choices are right

4 0

3 years ago

What is the molarity of a solution that contains 148g NaOH in 4.00 L solution? a 0.925 M b 0.0253 M c 0.459 M d 1.363 M

Anton [14]

Answer:

M = 0,925

Explanation:

n= mass/Molecular Weight

n = 148g / 39,99 (g/mol)

n= 3,7mol

M= n/Volumen(L)

M= 3,7mol/4L

M=0,925

8 0

3 years ago

Help?

Ahat [919]

Answer:

$KClO_3$

Explanation:

Hello!

In this case, as we know the mass of the total sample, we can first compute the mass of oxygen:

$m_O=22.9g-7.33g-6.65g=8.92g$

Next, we compute the moles of each element:

$n_K=\frac{7.33g}{39.9g/mol}= 0.184mol\\\\n_{Cl}=\frac{6.65g}{35.45g/mol}=0.188mol \\\\n_O=\frac{8.92g}{16.00g/mol} =0.5575mol$

Now, we divide the moles by 0.184 moles, the fewest ones, to obtain:

$K=\frac{0.184}{0.184}=1.0 \\\\Cl=\frac{0.187}{0.184}=1.0\\\\O=\frac{0.5575}{0.184} =3.0$

Therefore, the empirical formula is:

$KClO_3$

Regards!

3 0

3 years ago

What can you conclude about red visible light waves compared to blue visible light waves?

lawyer [7]

Explanation:

On comparing blue visible light with red visible light, there is difference in the wavelength, frequency, and energy. The difference between both red and blue visible lights are as follows.

Blue visible light:

It has low wavelength.
High frequency.
More energy.

Red visible light:

It has high wavelength.
Low frequency.
Less energy.

7 0

4 years ago

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