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3 years ago

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What element has the following electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6

d8?

1 answer:

musickatia [10]3 years ago

8 0

Answer:

Explanation:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d⁸

The element is Darmstadtium . It is a d block element . Its symbol is Ds . Its atomic no is 110 .

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If the distance between a point charge and a neutral atom and is multiplied by a factor of 5, by what factor does the force on t

dexar [7]

Given :

The distance between a point charge and a neutral atom and is multiplied by a factor of 5.

To Find :

By what factor does the force on the neutral atom by the point charge change.

Solution :

We know, electrostatic force between two object is directly proportional to product of charge and inversely proportional to distance between them.

Now, charge in neutral atom is 0 C.

So, the electrostatic force between two of them is also 0 N.

Therefore, by changing distance between the charge the forces did no change ( it remains zero).

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3 years ago

The solid rocket boosters for the space shuttle employ a mixture of aluminum and ammonium perchlorate (molar mass = 117 g/mol) a

Mnenie [13.5K]

Answer : The volume of gas at STP produced are 45.0 L

Explanation :

First we have to calculate the moles of ammonium perchlorate.

$\text{Moles of }NH_4ClO_4=\frac{\text{Mass of }NH_4ClO_4}{\text{Molar mass of }NH_4ClO_4}$

Molar mass of $NH_4ClO_4$ = 117 g/mole

$\text{Moles of }NH_4ClO_4=\frac{235g}{117g/mole}=2.01mole$

Now we have to calculate the moles of $NO$ gas produced during the reaction.

The balanced chemical reaction is,

$3Al(s)+3NH_4ClO_4(s)\rightarrow Al_2O_3(s)+AlCl_3(s)+3NO(g)+6H_2O(g)$

From the reaction we conclude that,

As, 3 moles of $NH_4ClO_4$ produces 3 moles of NO gas

So, 2.01 moles of $NH_4ClO_4$ produces 2.01 moles of NO gas

Now we have to calculate the volume of gas at STP.

At STP, 1 mole of substance occupy 22.4 L volume of gas.

As, 1 mole of NO gas occupy 22.4 L volume of gas.

So, 2.01 mole of NO gas occupy 2.01 × 22.4 L = 45.0 L volume of gas.

Therefore, the volume of gas at STP produced are 45.0 L

6 0

4 years ago

H2O+O2=H202, how would I balance this equation?

Sergio [31]

Answer:

2H2O2→2H2O+O2

Explanation:

This reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

Add 2 molecules of hydrogen peroxide and 2 molecules of water. Since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

2H2O2→2H2O+O2

8 0

3 years ago

what is the empirical formula of a compound that is found to consist of 56% chorine and no other element except iron

exis [7]

Answer:

FeCl₂

Explanation:

Empirical formula is the simplest formula of a compound.

Mass percentage of Chlorine = 56%

Mass percentage Iron = 100 - 56 = 44%

Elements

Fe Cl

Percentage mass 44 56

moles 44/55.85 56/35.5

0.79 1.56

Divide by the smallest

number 0.79/0.79 1.56/0.79

1 2

The empirical formula of the compound is FeCl₂

8 0

3 years ago

How many moles are in 4.24kg of Na2CO3?

frosja888 [35]

40.0 is the answer, sorry, I had some lag, I would've answered it like 5 minutes ago

Hope I helped

8 0

4 years ago