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Viktor [21]
3 years ago
13

Cuales son las fórmulas de la velocidad

Chemistry
1 answer:
AnnZ [28]3 years ago
7 0

Answer:

s = d÷ t

Explanation:

Where s means speed, d means distance and t means time

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A supposedly silver crown is tested to determine its density. it displaces 10.7 ml of water and has a mass of 112 g. part a coul
Anni [7]

The volume of water displace by crown is 10.7 mL. This will be equal to the volume of crown. Mass of crown is 112 g.

Density of a substance is defined as mass of substance per unit volume. It is mathematically represented as follows:

d=\frac{m}{V}

Putting the values,

d=\frac{112 g}{10.7 mL}=10.46 g/mL

The theoretical value of density of silver is 10.5 g/cm^{3} also, 1 mL is equal to 1 cm^{3} thus, density will be 10.5 g/mL.

This is approximately equal to the calculated value thus, the crown is made up of silver.


4 0
4 years ago
Surface tension explains which of the following
kirza4 [7]
I'm pretty sure the answer is 1. I and III
8 0
3 years ago
Read 2 more answers
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
In this experiment, you will change the temperature and particle size of the antacid tablet and observe how these changes affect
kotegsom [21]

Answer:

They change the rate of reaction.

Explanation:

Temperature increases the rate of reaction as particles move faster.

(Temperature is the average kinetic energy of particles)

Reducing the particle size increases the surface area to volume ratio, which increases the rate of reaction.

7 0
4 years ago
Read 2 more answers
I mark brainliest pls help
Sedbober [7]

Answer:

c

Explanation:

8 0
4 years ago
Read 2 more answers
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