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Vlad1618 [11]
3 years ago
6

What is used to determine the number of each atom in an ionic formula?

Chemistry
1 answer:
Nutka1998 [239]3 years ago
3 0

the oxidation state of each atom

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A 5.00-g sample of copper metal at 25.0 °C is heated by the addition of 133 J of energy. The final temperature of the copper is
vekshin1

<u>Answer:</u> The final temperature of the copper is 95°C.

<u>Explanation:</u>

To calculate the final temperature for the given amount of heat absorbed, we use the equation:

Q= m\times c\times \Delta T

Q = heat absorbed  = +133 J (heat is added to the system)

m = mass of copper = 5.00 g

c = specific heat capacity of copper = 0.38 J/g ° C      

\Delta T={\text{Change in temperature}}=T_2-T_1

T_1=25^oC

Putting values in above equation, we get:

+133J=5.00g\times 0.38J/g^oC\times (T_2-25)\\\\T_2=95^oC

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Breathing equipment used by rescue workers needs to capture the CO2 the humans breath out and produce O2 for them to breath in,
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Answer: 4KO_2+2CO_2\rightarrow 2K_2CO_3+3O_2

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The balanced chemical equation for reaction of potassium superoxide  with carbon dioxide to produce oxygen and potassium carbonate will be:

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A patient needs 0.024 g of a sulfa drug. There are 12-mg tablets in stock. How many tablets should be given?
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I would personally convert the 12 mg to g so I could see what I was working with. So 12 mg to grams is 0.012 g...

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so 0.024g/0.012g = 2 tablets or 0.012g X 2 is 0.024 g

hope this helps :)
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Social cost, Economic costs and Environmental Costs could be reduced by using Renewable energy sources like Hydro Power, Solar Power, Wind Power, Biomass and Geothermal plants.  They can provide sustainable energy services since they are available all of the time. They known to have less impacts on various aspects especially in the environmental aspect comparing it to nonrenewable resources like fossil fuel based power plants.  
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