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astra-53 [7]
1 year ago
8

Receiving an electrical shock when you forget to turn off the power before working on an electrical socket is an example of a ne

gative punishment. please select the best answer from the choices provided t f
Chemistry
1 answer:
raketka [301]1 year ago
8 0

Answer:

TRUE

Explanation

<u>Negative punishment's or  reinforcement .</u>

Negative reinforcement comes as a result of failing to take the necessary precautional measures , whether intentional or unintentional .

Forgetting is a natural circumstance hence if one forgets it means in the first place he has by passed the protocols anyway and he has to take the consequences  .

Sometimes it may be ignorance since it is in common knowledge to turn off  any machine and if possible you should unplug it from the power supply to avoid any shocks which may even be fatal if the source of power does not have mechanisms to control such situations i.e. shocks and power surges .

Psychological when one gets such a punishments he will always remember the ordeal since it inflicted pain on him and he will always take precautional measures before handling an electronic or power sources .

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Lithium, is used in dry cells and storage batteries and in high temperature lubricants, it has two naturally occurring isotopes,
erastovalidia [21]

<u>Answer:</u> The average atomic mass of lithium is 6.9241 u.

<u>Explanation:</u>

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i ....(1)

  • <u>For _3^6\textrm{Li} isotope:</u>

Mass of _3^6\textrm{Li} isotope = 6 u

Percentage abundance of _3^6\textrm{Li} isotope = 7.59 %

Fractional abundance of _3^6\textrm{Li} isotope = 0.0759

  • <u>For _3^7\textrm{Li} isotope:</u>

Mass of _3^7\textrm{Li} isotope = 7 u

Percentage abundance of _3^7\textrm{Li} isotope = 92.41%

Fractional abundance of _3^7\textrm{Li} isotope = 0.9241

Putting values in equation 1, we get:

\text{Average atomic mass of Lithium}=[(6\times 0.0759)+(7\times 0.9241)]

\text{Average atomic mass of Lithium}=6.9241u

Hence, the average atomic mass of lithium is 6.9241 u.

7 0
3 years ago
If 43.1 g of O2 and 6.8 g of CO2 are placed in a 13.7 L container at 34 degrees C, what is the mixture of gasses?
jonny [76]

Answer:

The total pressure of the gas mixture = 2.76 atm

Note: The question is not complete. The complete question is as follow:

If 43.1 g of O2 and 6.8 g of CO2 are placed in a 13.7 L container at 34 degree Celsius , what is the pressure of the mixture of gases?

Explanation:

Mass of O₂ gas = 43.1 g, molar mass of O₂ gas = 32.0 g/mol

Number of moles of O₂ gas = 43.1/32.0 = 1.347 moles

Mass of CO₂ gas = 6.8 g, molar mass of CO₂ gas = 44.0 g

Number of moles of CO₂ gas = 6.8/44 = 0.155 moles

Total number of moles of gas mixture, n = (1.347 + 0.155) = 1.502 moles

Volume of gas mixture, V = 13.7 L

Temperature of gas mixture, T = 34 °C = (273.15 + 34) K = 307.15 K

Pressure of gas mixture = ?

Molar gas constant, R = 0.0821 liter·atm/mol·K.

Using the ideal gas equation: PV =nRT

P = nRT/V

P = (1.502 × 0.0821 × 307.15) / 13.7

P = 2.76 atm

Therefore, the total pressure of the gas mixture = 2.76 atm

5 0
3 years ago
PLEASE HELP! I'll mark brainliest!
OLEGan [10]
Acidic and basic are two extremes that describe chemicals, just like hot and cold are two extremes that describe temperature. Mixing acids and bases can cancel out their extreme effects, much like mixing hot and cold water can even out the water temperature. A substance that is neither acidic nor basic is neutral. 
The character of acidic, basic and neutral is defined by the concentration of hydrogen ions [H+](mol/L). A solution with a concentration of hydrogen ions higher than 10-7mol/L is acidic, and a solution with a lower concentration is alkaline (another way to say basic). Using the formula, pH=-log[H+], a pH of 7 is neutral, a pH less than 7 is acidic, and a pH greater than 7 is basic. As one can see from this formula, ten times a given concentration of hydrogen ions means one unit lower in terms of pH value (higher acidity), and vice versa. 
The formula for ph is given by:pH=−log10[H+]

What is the concentration of H+ ions at a pH = 8?

In calculating for the concentration of hydrogen ion, the formula is given by:[H+]=(10)^(-pH)
Solution:
[H+]=(10)^(-8)[H+]=0.00000001 mol/L

What is the concentration of OH– ions at a pH = 8?pH+pOH=148+pOH=14pOH=6
[OH-]=(10)^(-pOH)[OH-]=(10)^(-6)[OH-]=0.000001
What is the ratio of H+ ions to OH– ions at a pH = 2?The ratio is 0.00000001:0.000001 which is equal to 0.01
7 0
3 years ago
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Cloudy nights are often warmer than clear nights. Why is this so?
dsp73

Answer: B

Explanation: The clouds act almost like a lid. Think of it like when you put tin foil over food before it goes in the oven. so that even after it is removed from the heat the tin foil traps it causing it to stay warm.

4 0
3 years ago
Help plz ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!
ddd [48]
Honestly I don’t even know
7 0
3 years ago
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