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3 years ago

Which statement explains why the melting point of perovskite is 1980°C?

Chemistry

1 answer:

Alex787 [66]3 years ago

8 0

Answer:

The melting point of perovskite is 1980°C because the electrostatic attraction between atoms holds them closely together.

Explanation:

Perovskites are materials which have the same crystal structure as calcium titanium oxide (CaTiO 3 ). Perovskites take their name from this mineral first discovered in 1839 and is named after L. A. Perovski. A general chemical formula for perovskite compounds is ABX 3 , where 'A' and 'B' are two cations of different sizes, X is an anion that bonds to both of the ions in the pervoskite material. The 'A' atoms are larger than the 'B' atoms. Pervoskite materials are ionic and ionic substances are known to have a high melting point due to very strong electrostatic interactions present in the substance. Hence its high melting point of 1980°C.

Pervoskites have many different applications in science such as lasers, photovoltaics etc.

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Rubbing alcohol is a liquid that is clear and has a strong odor. these obstacles are called

dem82 [27]

The answer is D. Hope this helps.

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3 years ago

What would be the mass of gas inside a 3.0-L balloon at 0 degrees Celsius and 1.0 atm filled with carbon dioxide gas? *

Anni [7]

Answer:

5.7 grams is the mass carbon dioxide gas inside a 3.0-L balloon.

Explanation:

Using ideal gas equation:

PV = nRT

where,

P = Pressure of carbon dioxide gas = $1.0 atm$

V = Volume of carbon dioxide gas = 3.0 L

n = number of moles of carbon dioxide gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of carbon dioxide gas =0°C = 0+273= 273 K

Putting values in above equation, we get:

$(1.0 atm)\times 3.0 L=n\times (0.0821L.atm/mol.K)\times 273 K\\\\n=0.13 mol$

Mass of 0.13 mole carbon dioxide gas :

= 0.13 mol × 44 g/mol = 5.7 g

5.7 grams is the mass carbon dioxide gas inside a 3.0-L balloon.

3 0

3 years ago

What is the major ion in seawater?

Dmitrij [34]

Answer:

It should be chloride I am almost positive

Explanation:

Typical Seawater

Chloride (Cl-) 18.980

Sodium (Na+) 10.556

Sulfate (SO42-) 2.649

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3 years ago

Why is controlling heat during space travel so important

sergeinik [125]

The answer is so you do not overheat

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3 years ago

Read 2 more answers

The following reaction shows the products when sulfuric acid and aluminum hydroxide react.

SSSSS [86.1K]

Answer:

There will remain 11.47 grams of Al(OH)3

Explanation:

Step 1: Data given

Mass of sulfuric acid = 35.0 grams

Molar mass sulfuric acid = 98.08 g/mol

Mass of aluminium hydroxide = 30.0 grams

Molar mass of aluminium hydroxide = 78.0 g/mol

Step 2: The balanced equation

2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O

Step 3: Calculate moles

Moles = mass / molar mass

Moles Al(OH)3 = 30.0 grams / 78.0 g/mol

Moles Al(OH)3 = 0.385 moles

Moles H2SO4 = 35.0 grams / 98.08 g/mol

Moles H2SO4 = 0.357 moles

Step 4: Calculate the limiting reactant

For 2 moles Al(OH)3 we need 3 moles H2SO4 to produce 1 mol Al(SO4)3 and 6 moles H20

H2SO4 is the limiting reactant. It will completely be consumed ( 0.357 moles). Al(OH)3 is in excess. There will be react 2/3 * 0.357 = 0.238 moles

There will remain 0.385 - 0.238 = 0.147 moles

Mass of Al(OH)3 remaining = 0.147 moles* 78.0 g/mol = 11.47 grams

There will remain 11.47 grams of Al(OH)3

6 0

3 years ago