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kow [346]
3 years ago
14

Identify the type of energy involved in each step:

Chemistry
2 answers:
horrorfan [7]3 years ago
6 0

Answer: 1) Electric energy

2) Heat energy

3) Thermal energy

Explanation:

1) You flip on the switch on a lamp - <u>Electric energy</u>.

Because, when we flip on the switch, the chemical energy of lamp is converted into electric energy as the electrons moves with the help of circuit.

2) The light bulb lights up -  <u>Heat energy</u>

when a light bulb lights up after there is flip on the switch on a lamp, then electric energy is converted into heat energy as the electrons passes through the resistor which makes bulb lights up.

3) The light bulb causes the lamp shade to melt - <u>Thermal energy</u>

Thermal energy is occurred due to change in temperature  i.e heat energy, in which objects start moving within the object.

When the bulb lights up, its temperature get increased makes the lamp shade to melt, so the heat energy is converted into thermal energy.

77julia77 [94]3 years ago
5 0

Answer:

a. Electric Energy

b. Light Energy

c. Thermal Energy

Explanation:

a. When a lamp is turned on by means of a switch, electric energy is usually used, since that is the form of energy that is generated when there is a potential difference between two points, which allows to establish an electric current, that electric current travels through the wires up to the bulb of the lamp

b. In this case a case of light energy is presented since that is the energy transported by the light and that is manifested on the matter in different ways, one of them is to remove the electrons from the metals. This is what usually happens in some types of light bulbs, that when the displacement of the electrons is promoted, a beam of light is generated.

c. The last case is a case of thermal energy, since this energy is that expressed as the total kinetic energy resulting from the random movements of atoms and molecules. This was what could happen in case b, when the beam of light was generated. This energy is released in the form of heat, and may present high temperatures.

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Answer:

7.08

Explanation:

To solve this problem we'll use the <em>Henderson-Hasselbach equation</em>:

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Where \frac{[A^-]}{[HA]} is the ratio of [sodium formate]/[formic acid] and pka is equal to -log(Ka), meaning that:

  • pka = -log (1.8x10⁻⁴) = 3.74

We<u> input the data</u>:

  • 4.59 = 3.74 + log\frac{[A^-]}{[HA]}

And<u> solve for </u>\frac{[A^-]}{[HA]}:

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3 0
3 years ago
How many neutrons does an element have if its atomic number is 55 and its mass number is 150?
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8 0
3 years ago
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Bromine has a density of 3.10g/cm3. If you have 50.0 ML of bromine, how many grams do you have?
Zanzabum

Answer:

The answer is

<h2>155 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of bromine = 50 mL

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We have the final answer as

<h3>155 g</h3>

Hope this<u> </u>helps you

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3 years ago
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The pressure of a 5.0 L sample of gas changes from 3.0 atm to 10.0 atm while the temperature remains constant. What is the gas’s
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Answer:

<h2>The answer is 1.5 L</h2>

Explanation:

The new volume can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

Since we are finding the new volume

V_2 =  \frac{P_1V_1}{P_2}  \\

From the question we have

V_2 =  \frac{5 \times 3}{10}  =  \frac{15}{10}  =  \frac{3}{5}  \\

We have the final answer as

<h3>1.5 L</h3>

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You didn't mention what "the following" were - please add additional information so the problem can be solved.


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