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KiRa [710]
3 years ago
8

Which metalloid has three valence electrons? 1. Lithium 2. boron 3. silicon 4. aluminum 5. arsenic 

Chemistry
2 answers:
iren [92.7K]3 years ago
5 0

Answer:

boron

Explanation:

kobusy [5.1K]3 years ago
5 0

Answer:

A

Explanation:

Edgenuity

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what element has the electron configuration of 1s22s22p63s23p64s23d104p65s24d105p66s24f 145d106p67s25f 146d8
LekaFEV [45]
It is the darmstadtium element that has the electron configuration above and the atomic number of 110
8 0
3 years ago
Titanium dioxide (TiO2) is used extensively as a white pigment. It is produced from an ore that contains ilmenite (FeTiO3) and f
STALIN [3.7K]

Answer:

2928kg of ore are required.

2585kg of the 80% H₂SO₄ solution are required.

Explanation:

To solve this question we need first to find the moles of titanium in 1000kg of TiO₂. Keeping in mind the 89% of descomposition we can find the mass of the ore and the mass of the 80% sulfuric acid required:

<em>Moles TiO₂ -Molar mass: 79.866g/mol-:</em>

1x10⁶g * (1mol / 79.866g) = 12521 moles Titanium

In mass -Molar mass Ti: 47.867g/mol-:

12521 moles Titanium * (47.867g / mol) = 599341.4g of Ti.

As the ore contains 24.3% of Ti:

599341.4g of Ti = 599.34kg Ti * (100 / 24.3) = 2606kg ore

As the descomposition is just of 89%:

2606kg ore * (100 / 89) =

<h3>2928kg of ore are required</h3><h3 />

<em>Mass 80% sulfuric acid:</em>

12521 moles Titanium = 12521 moles H₂SO₄ * (100/89) = 14068.5 moles of H₂SO₄ are required.

In an excess of 50% =

14068.5 moles of H₂SO₄ are required * 1.5 = 21102.8 moles of H₂SO₄.

The mass is:

21102.8 moles of H₂SO₄ * (98g / mol) = 2068075g = 2068kg of sulfuric acid

That is in the 80%:

2068kg of sulfuric acid * (100/ 80) =

<h3>2585kg of the 80% H₂SO₄ solution are required</h3>
3 0
3 years ago
How many molecules of HCI would react with 2 moles of AI?
laila [671]

Answer:

A:6.02+3H2

Explanation:

7 0
3 years ago
Read 2 more answers
Which example illustrates the transfer of energy through RADIATION?
iragen [17]
I think it is feeling warm air while standing in front of the blower from a heating system.

Hope this helps! :)
6 0
3 years ago
Read 2 more answers
The SI unit of measure for length - the meter -would be most appropriate when
erastovalidia [21]

Answer:- The correct answer is B. measuring the height of a building.

Explanations:- Insects and ants are very small. So, meter is not the right unit of measure their length. Their lengths would be measure in mm that is millimeters. So, options A and C are not good.

The distance between two cities is mostly too much so it's measured in kilometers or miles. So, D is also not good.

Height of buildings is measured in meters and so the correct option is B.


7 0
4 years ago
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