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2 years ago

Meaning of dot in a hydrate formula

Chemistry

2 answers:

Rina8888 [55]2 years ago

5 0

Answer:

By writing AB⋅xCD chemists mean that there are CDs are found in the crystalline framework of AB. The most common example of this is water trapped inside the crystal structure of ionic compounds.

An example that's often taught is CuSO4⋅5H2O. See that 5 that's a representative of x? It means that water can be bound only with intermolecular interactions, but it exists in the structure in a stoichiometric ratio.

topjm [15]2 years ago

3 0

Answer:

bonds with water molecules

Explanation:

The formula of the hydrated form is CuSO 4. 5H 2 O. The dot after the formula for copper sulphate indicates bonds with water molecules. Research suggests that the nature of these bonds is not as simple as was once thought.

Hope it helps :)

pls mark brainliest :P

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I wanted known how many of the reaction below is energy released

Tema [17]

Answer:

Explanation:

In two reactions energy is released.

1) C₆H₁₂O₆ + 6O₂ → 6H₂O + 6CO₂ + heat

It is cellular respiration reaction.It involves the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.

Glucose + oxygen → carbon dioxide + water + 38ATP

2) 2H₂ + O₂ → 2H₂O ΔH = -486 kj/mol

The given reaction is formation of water. In this reaction oxygen and hydrogen react to form water and 486 kj/mol is also released.

The reaction in which heat is released is called exothermic reaction.

Exothermic reaction:

The type of reactions in which energy is released are called exothermic reactions.

In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.

For example:

Chemical equation:

C + O₂ → CO₂

ΔH = -393 Kj/mol

it can be written as,

C + O₂ → CO₂ + 393 Kj/mol

Endothermic reactions:

The type of reactions in which energy is absorbed are called endothermic reactions.

In this type of reaction energy needed to break the bond are higher than the energy released during bond formation.

For example:

C + H₂O → CO + H₂

ΔH = +131 kj/mol

it can be written as,

C + H₂O + 131 kj/mol → CO + H₂

5 0

2 years ago

How many grams of sodium chloride are required to make a 1.0 L solution with a concentration of 3.5 M?

satela [25.4K]

3.5 M has 3.5 moles per litre
so we have one litre, so we need 3.5 moles
moles = mass/molarmass
3.5 * 23 = 80.5

5 0

3 years ago

Read 2 more answers

Boyle's Law represents the relationship of volume as pressure changes. The constants of Boyle's Law are:

Aleksandr [31]

Answer:

d. Temperature and number of molecules of gas

Step-by-step explanation:

Boyle's Law states, "The volume of a fixed mass of a gas is inversely proportional to the pressure if the temperature remains constant."

Let's examine the words.

"… volume…is inversely proportional to the pressure …" This means that volume and pressure are the variables.

"… fixed mass of a gas …" means that the number of molecules is constant.

"… temperature remains constant" speaks for itself.

a, c, and e are wrong, because pressure is a variable.

b is wrong, because volume is a variable.

5 0

3 years ago

6. We have many vestigial structures that are similar to structures on modern day chimpanzees. How can we

ollegr [7]

Answer:

pineal body is a vastigious structure which signifies same origin of chimpanzee and modern man

Explanation:

5 0

3 years ago

In H2 (g) + I2 (g) = 2HI (g), the initial reactions H2 and I2 are each equal to 1 mol / L.

mezya [45]

Answer:

sorry mateeeeee dont know the answerrrrrr

3 0

3 years ago