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3 years ago

Name the following compounds:

Chemistry

1 answer:

HACTEHA [7]3 years ago

3 0

CaF2 = Calcium fluoride (leave it as is, it in emoerical form already)

Na20 = Sodium oxide (leave it as is, it in emoerical form already)

BaS = Barium Sulfide (leave it as is, it in emoerical form already)

CuSO4 = Copper(II) sulfate = CuSO4 5H2O

Fe2O3 = Iron(III) oxide (leave it as is, it in emoerical form already)

HgCl2 = Mercury(II) chloride (leave it as is, it in emoerical form already)

KC2H3O2 = Potassium Acetate (leave it as is, it in emoerical form already)

Al(OH)3 = Aluminium hydroxide (leave it as is, it in emoerical form already)

Fe(NO3)3 = Iron(III) nitrate (leave it as is, it in emoerical form already)

N2O5 = Dinitrogen pentoxide = N2O5 (it's subscrip is already simplified)

PO5 = Phosphorus pentoxide = P2 O5 (there was just no 2 after the P so that's all that was needed there)

I'm am so sorry if this didn't help too much, I hope I did help, I in some way, have a wonderful day.

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Ammonium hydroxide is _____. an acid a base a neutral

Igoryamba

Ammonium hydroxide is basic

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2 years ago

Which materials are typically used as thermal insulators? Check all that apply.

vaieri [72.5K]

Answer : The correct options are, (B) Foam, (C) Ceramic, (D) Wood and (E) Plastic

Explanation :

As we know that the conductor is the material that conduct or transmits the energy or electricity through them and insulator is the material that resist the energy transfer.

There are different types of insulators and conductors which are:

Electrical conductor : It is a type of material that conducts electrons, protons and ions. It conduct electricity. For example : silver, gold, copper, steel, brass, etc.

Thermal conductor : It is a type of material that conducts heat. For example: diamond, silver, gold, etc.

Electrical insulator : It is a type of material in which the electrical charges do not flow freely that means very little amount of electric current flow through them. For example : glass, plastic, rubber, porcelain, pure water, dry paper, dry wood, etc.

Thermal insulator : It is a type of material that reduces the transfer of heat between the object in thermal contact. For example : polystyrene foam, water, wool, plastic, ceramic, wood.

Hence, the materials typically used as thermal insulators are, foam, ceramic, wood and plastic.

5 0

3 years ago

Read 2 more answers

0.254g lead(ii)ethanoate, on adding excess K2CrO4 solution, gave 0.130g of lead(ii)chromate precipitate. what is the percentage

Alborosie

Answer:

32.8%

Explanation:

All of the Pb⁺² species precipitated as lead(II) cromate, PbCrO₄ (we know this as excess K₂CrO₄ was used).

First we convert 0.130 g of PbCrO₄ into moles, using its molar mass:

0.130 g ÷ 323 g/mol = 4.02x10⁻⁴ mol PbCrO₄

There's 1 Pb⁺² mol per PbCrO₄ mol, so in total 4.02x10⁻⁴ moles of Pb⁺² were in the ethanoate sample.

We convert those 4.02x10⁻⁴ moles of Pb into grams:

4.02x10⁻⁴ mol * 207 g/mol = 0.083 g Pb

Finally we calculate the percentage composition of Pb:

0.083 g Pb / 0.254 g salt * 100% = 32.8%

3 0

3 years ago

Solid sodium metal reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrog

asambeis [7]

Answer:

4.6 × 10²³ molecules:

Step-by-step solution

You will need a balanced equation with masses, moles, and molar masses, so let's gather the information in one place:

M_r: 22.99

2Na + 2H₂O ⟶ 2NaOH + H₂

m/g: 35

1. Calculate the moles of Na

Moles of Na = 35 g Na × (1 mol Na/22.99 g Na)

Moles of Na = 1.52 mol Na

2. Calculate the moles of H₂

Moles of H₂ = 1.52 mol Na × (1 mol H₂/2 mol Na)

Moles of H₂= 0.761 mol H₂

3. Calculate the molecules of H₂

6.022 × 10²³ molecules H₂ = 1 mol H₂

Molecules of H₂ = 0.761 × (6.022 × 10²³ /1)

Molecules of H₂ = 4.6 × 10²³ molecules H₂

The reaction forms 4.6 × 10²³ molecules of H₂.

5 0

3 years ago

12. When a chlorine atom forms an ion its radius increases, but when a sodium atom forms an ion its radius decreases. Explain th

Lana71 [14]

Explanation:

When a chlorine atom forms an ion, it gains electrons, making it negative. A neutral chlorine will become a chlorine with a -1 charge. When it gains an electron, the radius increases.

When a sodium atom forms an ion, it loses electrons, making it positive. A neutral sodium will become a sodium with a +1 charge. When it loses an electron, the radius decreases.

4 0

3 years ago