All categories

2 years ago

Calculate the number of chloride ions in 6.8 g of zinc chloride

Chemistry

1 answer:

Bumek [7]2 years ago

3 0

Answer:

The correct answer is 0.300 * 10^23 ions.

Explanation:

Based on the given question, there is a need to find the number of chloride ions in the mentioned 6.8 grams of zinc chloride compound.

The moles of zinc chloride (ZnCl2) is,

= mass of zinc + 2 mass of chlorine

= 65.38 + 2 (35.45)

=65.38 + 70.90

= 136.28 grams (The molecular mass of zinc is 65.38 and the molecular mass of chlorine is 35.45)

Thus, 136.28 g of ZnCl2 contains 70.90 grams of chlorine

Therefore, 6.8 grams of ZnCl2 will comprise = (70.90/136.28) * 6.8

= 3.537 g of chlorine

70.90 g of Cl comprise 6.022*10^23 chlorine, thus, 3.537 g of Cl will comprise (6.022*10^23/70.90) * 3.537

= 0.300 * 10^23 ions of chlorine.

You might be interested in

1. Which liquid sample is a pure substance?

IRISSAK [1]

The whole Activity , poem and paragraph is missing in the question.

Answer:

(1) Liquid A

(2) Solid A

Explanation:

Using this part of the given poem

Substances and mixtures behave differently,

During boiling and melting most especially

Boiling point of substance is fixed while mixture is not

Substance melts completely but mixture does not

The boiling point of the Pure substance remain fixed after reaching its boiling point this is shown by Liquid A

Solid A is melting completely so Solid A is a pure substance.

6 0

1 year ago

Notice that "SO4" appears in two different places in this chemical equation. SO42− is a polyatomic ion called "sulfate." What nu

masya89 [10]

Answer : The number placed in front of $CuSO_4$ should be, three (3).

Explanation :

Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.

The given unbalanced chemical reaction is,

$CaSO_4+AlCl_3\rightarrow CaCl_2+Al_2(SO_4)_3$

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of chloride and sulfate ion are not balanced.

In order to balanced the chemical reaction, the coefficient 3 is put before the $CuSO_4$ , the coefficient 2 is put before the $AlCl_3$ and the coefficient 3 is put before the $CaCl_2$ .

Thus, the balanced chemical reaction will be,

$3CaSO_4+2AlCl_3\rightarrow 3CaCl_2+Al_2(SO_4)_3$

Therefore, the number placed in front of $CuSO_4$ should be, three (3).

5 0

2 years ago

Ron and Hermione begin with 1.50 g of the hydrate copper(II)sulfate ∙ x-hydrate (CuSO4 ∙ xH2O), where x is an integer. Part of t

Gnom [1K]

Answer:

The unknown integer X in the formula is 5.

Explanation:

1) Data:

a) Mass of CuSO₄ ∙ XH₂O = 1.50 g

b) Mass of CuSO₄ = 0.96

c) X = ?

2) Additional needed data:

a) Molar Mass of CuSO₄ = 159,609 g/mol

b) Molar mass of H₂O = 18,01528 g/mol

3) Chemical principles and formulae used:

a) Law of conservation of mass

b) Molar mass = mass in grams / number of moles = m / n

4) Solution:

a) Law of conservation of mass:

Mass of CuSO₄ ∙ XH₂O = mass of CuSO₄ + mass of H₂O

1.50g = 0.96g + mass of H₂O ⇒ mass of H₂O = 1.50g - 0.96g = 0.54g

b) Moles

n = m / molar mass

CuSO₄: n = 0.96g / 159.609 g/mol = 0.0060 mol

H₂O: 0.54g / 18.01528 g/mol = 0.030 mol

c) Proportion:

Divide both mole amounts by the least of the two numbers, i.e. 0.0060

CuSO₄: 0.0060 / 0.0060 = 1

H₂O: 0.030 mol / 0.0060 = 5

Then, the ratio of CuSO₄ to H₂O is 1 : 5 and the chemical formula is:

CuSO₄ . 5H₂O.

Hence, the value of X is 5.

5 0

1 year ago

Read 2 more answers

Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction: C(s)+2H2O(g)→2H2

madam [21]

The question is incomplete , complete question is:

Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction:

$C(s)+ 2 H_2O(g)\rightarrow 2H_2(g)+CO_2(g).\Delta H=?$

Note that the average bond energy for the breaking of a bond in CO2 is 799 kJ/mol. Use average bond energies to calculate ΔH of reaction for this reaction.

Answer:

The ΔH of the reaction is -626 kJ/mol.

Explanation:

$C(s)+ 2 H_2O(g)\rightarrow 2H_2(g)+CO_2(g).\Delta H=?$

We are given with:

$\Delta H_{H-O}=459 kJ/mol$

$\Delta H_{H-H}=432 kJ/mol$

$\Delta H_{C=O}=799 kJ/mol$

ΔH = (Energies required to break bonds on reactant side) - (Energies released on formation of bonds on product side)

$\Delta H=(4\times \Delta H_{O-H})-(2\times \Delta H_{H-H}+2\times\Delta H_{C=O})$

$=(4\times 459 kJ/mol)-(2\times 432 kJ/mol+2\times 799 kJ/mol$

$\Delta H=-626 kJ/mol$

The ΔH of the reaction is -626 kJ/mol.

5 0

2 years ago

The periodic table is arranged by various patterns. Is there a pattern with regard to ionic charge? in three to five sentences,

irina1246 [14]

Ionic charge for metals are always positive while the nonmetals have negative charges. The magnitude of charges in the periodic table increases from left to right.

The periodic table is a classification of elements according to their periodic properties.

Metals form positive ions while nonmetals form negative ions. However, the magnitude of ionic charge (positive or negative) increases from left to right in the periodic table.

For instance, group 1 elements form a charge of +1, group 2 elements form a charge of +2, group 3 elements have a charge of +3 and so on. The magnitude of charge continues to increases likewise across a period.

Learn more; brainly.com/question/81085

3 0

1 year ago