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3 years ago

When salt dissolves in water, the water molecules are attracted by dissolves salt particles. This attraction is called ?

1 answer:

4 0

When salt dissolves in water, the water molecules are attracted by dissolves salt particles. This attraction is called dissociation.

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Layer B in the diagram is located between the crust and core in terms of location, temperature, and pressure. What part of the e

nignag [31]

The answer is c) the mantle

8 0

3 years ago

Read 2 more answers

When 40.5 g of Al and 212.7 g of Cl2 combine in the reaction: 2 Al (s) + 3 Cl2 (g) --> 2 AlCl3 (s) c) How many moles of the e

sineoko [7]

Answer:

The answer to your question is 1.49 mol of Cl₂

Explanation:

Data

mass of Al = 40.5 g

mass of Cl₂ = 212.7 g

moles of excess reactant = ?

- Balanced chemical reaction

2 Al(s) + 3Cl₂(g) ⇒ 2AlCl₃

Process

a) Calculate the molar mass of the reactants

molar mass of Al = 2 x 26.98 = 53.96 g

molar mass of Cl₂ = 6 x 35.45 = 212.7 g

b) Calculate the theoretical proportion Al/Cl₂ = 53.96/212.7 = 0.254

Calculate the experimental proportion Al/Cl₂ = 40.5/212.7 = 0.19

As the experimental proportion is lower than the theoretical proportion we conclude that the limiting reactant is Aluminum.

c) Calculate the grams of excess reactant

53.96 g of Al ------------------ 212.7 g of Cl₂

40.5 g of Al ------------------- x

x = (40.5 x 212.7) / 53.96

x = 8614.35 / 53.96

x = 159.64 g of Cl₂

Excess Cl₂ = 212.7 - 159.64

= 53.057 g

d) Calculate the moles of Cl

35.45 g of Cl ----------------- 1 mol

53.057 g of Cl --------------- x

x = (53.057 x 1)/35.45

x = 1.49 mol of Cl₂

6 0

3 years ago

Read 2 more answers

Classify each of these reactions. Ba(ClO3)2 → BaCl2 3 O2 double replacement combination single replacement decomposition CaO CO2

faltersainse [42]

Answer:

Ba(ClO₃)₂ → BaCl₂ + 3 O₂ Descomposition.

CaO + CO₂ → CaCO₃ Combination.

NaNO₂ + HCl → NaCl + HNO₂ Double replacement.

Mg + ZnSO₄ → MgSO₄ + Zn Single replacement.

Explanation:

A combination reaction is defined as a reaction in which two or more substances combine to form a single new substance.

A + B → AB

A descomposition reaction is defined as a reaction in which a compound breaks down into two or more simpler substances.

AB → A + B

A double replacement is a chemical reaction were the positive and negative ions of two ionic compounds exchange places to form two new compounds.

AB + CD → AD + CB

A single replacement is another type of reaction were one element replaces a similar element in a compound.

A + BC → AC + B

Thus, with this information it is possible to classify these reactions as:

Ba(ClO₃)₂ → BaCl₂ + 3 O₂ Descomposition. One single molecule breaks down into two or more molecules

CaO + CO₂ → CaCO₃ Combination. Two substances are combined to form one single molecule

NaNO₂ + HCl → NaCl + HNO₂ Double replacement. Na and H are exchange places to form two new compounds

Mg + ZnSO₄ → MgSO₄ + Zn Single replacement. Mg is replacing Zn.

I hope it helps!

6 0

3 years ago

Rank the following compounds in order of decreasing boiling point: potassium fluoride (KF), acetylene (C2H2), and formaldehyde (

otez555 [7]

Answer: $KF$ > $CH_2O$ > $C_2H_2$

Explanation:

The order of boiling point depends upon the type of interactions present between the molecules.

Potassium fluoride (KF) is an ionic compound and the opposite ions are held together by strong electrostatic forces.

$C_2H_2$ is a covalent compound and the molecules are held together by weak van der Waals' forces.

Formaldehyde is a polar compound due to presence of polar carbonyl group. Hence dipole-dipole force is present between formaldehyde molecules.

Thus the decreasing order of boiling point is:

$KF$ > $CH_2O$ > $C_2H_2$

8 0

3 years ago

HELP WILL GIVE BRAINLIESTWhich of these elements would have the largest ionic radius?

iogann1982 [59]

Answer:

Bi3+ has 103

C4- has 170

Li+ 76

Na+102

Cl-185

5 0

3 years ago