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Dafna11 [192]
3 years ago
14

Electric cables for your lamp have a plastic rubber coating around the wire. Explain why this material surrounds the metal cable

.
Chemistry
1 answer:
kvasek [131]3 years ago
4 0

Porque ese material no permite que la electricidad pase por nuestro cuerpo al tocar el cable de lo contrario resibiriamos una pequeña descarga eléctrica (según los voltios que tenga) también se puedo con otras materiales (el cuero) pero no son tan confiables

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12. If a substance has a pH of 3.5, is it<br> acidic or basic?
dolphi86 [110]
The answer is acidic.

pH < 7 = acidic

pH > 7 base
6 0
3 years ago
The green light emitted by a stoplight has a wavelength of 505 nm. What is the frequency of this photon? (c = 3.00 × 10⁸ m/s).
Kitty [74]

Answer:

5.9405*10^14 Hz

Explanation:

Remember the equation c=v*λ

v=frequency

λ=wavelength

By manipulating the equation, we can get it in terms of frequency:

c/λ=v

Now convert wavelength to meters (1nm=m*10^-9)

5.05*10^-7m (2 decimal places were shifted to make the number between 1-10, hence the -7 exponent)

Use the manipulated equation:

(3.00*10^8)/(5.05*10^-7), which yields:

5.9405*10^14 Hz (or s^-1)

6 0
3 years ago
How many grams of kclo3 are needed to make 30.0 grams of kcl
lubasha [3.4K]

The mass of  potassium chlorate, KClO₃ needed to produce 30 grams of potassium chloride, KCl is 49.33 grams

<h3>Balanced equation </h3>

2KClO₃ —> 2KCl + 3O₂

Molar mass of KClO₃ = 39 + 35.5 + (16×3) = 122.5 g/mol

Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g

Molar mass of Kcl= 39 + 35.5 = 74.5 g/mol

Mass of KCl from the balanced equation = 2 × 74.5 = 149 g

SUMMARY

From the balanced equation above,

149 g of KCl were obtained from 245 g of KClO₃

<h3>How to determine the mass of KClO₃ needed </h3>

From the balanced equation above,

149 g of KCl were obtained from 245 g of KClO₃

Therefore,

30 g of KCl will be obtained from = (30 × 245) / 149 = 49.33 g of KClO₃

Thus, 49.33 g of KClO₃ are needed for the reaction

Learn more about stoichiometry:

brainly.com/question/14735801

7 0
2 years ago
Describe a solution and tell if the parts are mixed chemically or physically.
wel
Solution  is  homogeneous  mixture  which  is made  up  of  two  or  more  substances.Solution is  composed  of  solute  and  a solvent.Solute is  the  substance  that  dissolve  while  solvent  is  a liquid  in which   solvent dissolve. Solution  involve a  chemical  change  since new substance are  formed  and  involve  chemical  reaction.
7 0
3 years ago
What would the coefficient of al(no3)3 be in the balanced equation?
soldi70 [24.7K]
First, you have to know what reacts with Aluminum Nitrate so that you can balance the equation and find out the stoichiometric coefficient. I found a similar question from another website as shown in the picture attached. Balancing the reaction would result to:

2Al(NO₃)₃ + 3FeCl₂ --> 3Fe(NO₃)₂ + 2AlCl₃

<em>The coefficient is 2.</em>

7 0
4 years ago
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