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DedPeter [7]
2 years ago
8

How did dmitri mendeleev arrange the periodic table.

Chemistry
1 answer:
worty [1.4K]2 years ago
3 0

Answer:

order of increasing relative atomic mass

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Is this balanced ?2 Fe(NO3)3 + 3 MgSO4 → 3 Mg(NO3)2 + 2 Fez(SO4)3
Alex

it shoudl be : 2Fe(NO3)3 + 3MgSO4 → 3Mg(NO3)2 + Fe2(SO4)3

(the difference is Fe2(SO4)3 has no coefficient)

8 0
3 years ago
150.0 grams of an isotope with a half-life of 36.0 hours is present at time zero. How long will it take
leonid [27]

Given :

Initial mass , a = 150 gm .

Half time ,

t_{\dfrac{1}{2}}=36 \ hours.

Final mass , x = 18.75 gm .

To Find :

The time taken to decay 18.75 gm .

Solution :

We know , time taken is given by :

t=\dfrac{1}{k}\times ln(\dfrac{a}{a-x})

Here , k is a constant given by :

k=\dfrac{0.693}{t_{\dfrac{1}{2}}}\\\\\\k=\dfrac{0.693}{36}

Putting all given value in above equation :

We get :

t=\dfrac{36}{0.693}\times ln(\dfrac{150}{150-18.75})\\\\t=6.94\ hours

Therefore , time taken is 6.94 hours .

Hence , this is the required solution .

5 0
4 years ago
What is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 s? Take the direction west to be positive,
Lyrx [107]
A.)  Average acceleration = change in velocity/time = final velocity - initial velocity/time = 10-0/4 = 10/4 = 2.5m/s^2. 
3 0
3 years ago
Electron configuration of Cl minus
Dvinal [7]

Answer:

The neutral atom chlorine (Z=17), for instance has 17 electrons. Therefore, its ground state electronic configuration can be written as 1s 22s 22p 63s 23p 5. The chloride ion (Cl -), on the other hand, has an additional electron for a total of 18 electrons.

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A circular flow of warmer fluid in cooler fluid is called a ( n)
7nadin3 [17]
This is called a convection current
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4 years ago
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