CHEMISTRY HIGH SCHOOL

a man bought two watches for Rs 2500 each.He sold one of them at 10% . profit and the other at 4% loss.what was his gain or loss percent on the whol​

Answers

Answer 1
Answer:

Answer:

Selling price of watch A and watch B= Rs. 425

Let cost price of watch A=x

Profit =10%

∴

100

110

x=425

x=386.36

Let cost price of watch B=y

Loss =10%

∴

100

90

y=425

y=472.22

Net cost price =x+y=858.5858

Net selling price =850

Loss%=

858.58

858.5858−850

×100=1%

Explanation:

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What is inert pair effect​

Answers

Answer:

The inert pair effect is the tendency of the two electrons in the outermost atomic s-orbital to remain unshared in compounds of post-transition metals. The term inert pair effect is often used in relation to the increasing stability of oxidation states that are two less than the group valency for the heavier elements of groups 13, 14, 15 and 16. .[1] The name suggests that the outermost s electrons are more tightly bound to the nucleus in these atoms, and therefore more difficult to ionize or share

If you begin with 1250 grams of N2 and 225 grams of H2 in the reaction that forms ammonia gas (NH3), how much ammonia will be formed? What is the limiting reagent? How much of the reagent is left when the maximum amount of ammonia is formed?(AP Chemistry summer homework packet)


Please help! Thanks. :)

Answers

N₂+3H₂⇒ 2NH₃
m(NH₃)=1250+225*2=1700 grams
N₂ is the limiting reagent.
1250 grams are left when the maximum amount of ammonia is formed.

Plz help based on graph 1. what is happening to the population of the mice between days 0 and 7? suggest some possible reasons why this trend is occurring? 2. what is the approximate carrying capacity of this mouse population from observing the graph? how do you know this ? 3. the farmer who owns the barn has been given two barn cats how will this affect the size of the mouse population explain your answer 4. What are some other factors that will change the size of the mouse population in the future?

Answers

1.  The population of the mice seemed to grow until day 7.  This likely occurred do to the fact that the mice kept reproducing and they had enough resources to sustain the population growth.
2.  the carrying capacity is around 24 since that is when they reach population equilibrium.
3.  This will lower the mice population since it will introduce a predator that will lower the carrying capacity.
4.  The mice population can change in the future if more predators are introduced, if predators die out/go away, if an invasive species is introduced that competes with the mice for resources, if the climate changes, and if the amount of resources available to the mice increases or decreases.
I hope this helps. let me know in the comments if anything was unclear.

In a calcium atom in the ground state, the electrons that possess the least amount of energy are located in the(1) first electron shell
(2) second electron shell
(3) third electron shell
(4) fourth electron shell

Answers

According to the electronic configuration, a calcium atom in the ground  state electrons which possess least amount of energy are located in first shell.

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elementshave valence shell complete in ground state and hence are said to be stable.

According to the electronic configuration,as the number of shells increases their energy also increases .Hence, electrons in first shell have least energy.

Learn more about electronic configuration,here:

brainly.com/question/13497372

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Answer:

1

Explanation:

first electron shell.

First electron shell possesses the least amount of energy at the core.

Hope this helps.

(?)Li2O + (?)H2O → (?)LiOH

Answers

Answer:

Li2O+H2O---->(2)LiOH

Explanation:

you have to balance the equation and not all the blanks have to be filled all the time but if it makes it easier for you in the first 2 question marks you can put a 1 which isnt necessary but if ur a visual person it will help.

hope this helps im litterally learning the same thing as u lol

Answer:

1,1,2

Explanation:

this was correct for me, if it wasnt correct check if youre on the right question

Calculate the atmospheric pressure if the boiling point of water is 81 degrees Celsius.

Answers

Answer : The atmospheric pressure of water if boiling at 81 °C will be 369 mmHg.


Explanation : The vapor pressure of boiling water can be calculated using the Antoine Equation:


log P = A - [(B)/( C + T) ],


where P is the pressure in mmHg,

A = 8.07131,

B = 1730.63

C = 233.426

and T = temperature in °C (81°C)


Substituting the given values, we get,

Log P = 8.07131− [(1730.63)/(233.426 + 81)]

Therefore, Log P =8.07131 − 5.5041 = 2.567.


Now, P = (10^(2.567) ) =369 mmHg.


Hence, the atmospheric pressure will be 369 mmHg.
To calculate the atmospheric pressure at a specific boiling point of water, we use the steam table or the Antoine equation. From steam table via interpolation, at 81 C, the pressure where saturation occurs is the atmospheric pressure. The atmospheric pressure is 369.7 mm Hg or 0.4864 atm.
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