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4 years ago

On heating 5.03 g of hydrated barium chloride (BaCl2 XH2O), 4.23 g is left behind. What is the name of this hydrate? (

1 answer:

8 0

1) Deduce the two masses and see the amount of water was driven off when heated: 

5.03 g - 4.23 g = 0.8 g H2O given off 

2) Change mass from grams to moles of H2O: 

0.8 g H2O / 18 g H2O in 1 mole = 0.044 mol H2O 

3) Change left over mass to moles of BaCl2 .

4.23 g BaCl2 / 207 g BaCl2 in 1 mol = 0.021 mol BaCl2 

4)Find the ratio of mol H2O to mol BaCl2: 

0.044 mol H2O : 0.021 mol BaCl2 

5) The resulting ratio is 2:1 so two H2O for each BaCl2, thus, the hydrate was named: 
Barium chloride di-hydrate

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2.38g of black copper(iii) oxide is completely reduced to by hydrogen to give copper and water. What are the number of atoms of

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Explanation:

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3 years ago

The oxides of nitrogen are very important ingredients in determining urban air pollution. Name each of the following compounds.(

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Answer:

(a) N₂O - Dinitrogen monoxide or Dinitrogen (I) oxide

(b) NO - Nitrogen monoxide or Nitrogen (II) oxide

(d) N₂O₅ - Dinitrogen pentoxide

(e) N₂O₄ - Dinitrogen tetraoxide.

Explanation:

To name each of the compounds,

(a) N2O; It is properly written as N₂O. N₂O is a colorless, sweet tasting gas also known as "laughing gas".

N₂O - Dinitrogen monoxide OR Dinitrogen (I) oxide.

(b) NO; NO is a colorless gas.

NO - Nitrogen monoxide OR Nitrogen (II) oxide.

NO₂ is a reddish-brown gas.

NO₂ - Nitrogen dioxide or Nitrogen (IV) oxide.

(d) N2O5; It is properly written as N₂O₅

N₂O₅ is a white solid.

N₂O₅ - Dinitrogen pentoxide.

(e) N2O4; It is properly written as N₂O₄;

N₂O₄ is a red-brown liquid with an unpleasant smell.

N₂O₄ - Dinitrogen tetraoxide.

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4 years ago

Metal cations are atoms that have a positive charge. What type of bond is a metal cation likely to form? A. covalent bond B. dou

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Answer:

D. ionic bond

Explanation:

Due to electron deficiency in a metal cation, they cannot form a covalent bond beacuse it means to share electrons. By contrast metal cation seek for electrons. In an ionic bond, one atom give electrons, while another atom recevie electron. Because of that, this is the better option to metal cations.

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3 years ago

Look at the image shown.

Marina86 [1]

Linear molecule with two domains

Explanation:

The describe geometry of the substance fits that of a linear molecule with two domains.

This description is based on the VSEPR i.e Valence Shell Electron Pair repulsion(VSEPR) model. It states that if an atom is bonded by two or more kinds of atoms the shape is determined by the geometry of the bonds around the central atom.

The electron domain is the number of lone pairs of electron around an atom.

Here in CO₂:

there are two lone pairs and the oxygen atoms are in a 180° linear shape around the central carbon atom. The bond is made up of two O⇔C structure.

Learn more:

Valence shell brainly.com/question/10901976

#learnwithBrainly

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4 years ago

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A block of wood has a volume of 55 cm3 and a mass of 550 g. What would be its density? Answer in units of g/cm3.

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given,

volume (V)=55cm3

mass(m)=550g

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=10 g/ cm3

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4 years ago