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natita [175]
3 years ago
11

When calcium oxide, CaO(s) dissolves in water, the water becomes hot. Write a chemical equation for this process and indicate wh

ether it is exothermic or endothermic.
Chemistry
1 answer:
denis23 [38]3 years ago
6 0

Answer:

The interaction reaction of calcium oxide and water leads to the formation of calcium hydroxide, this reaction is exothermic, which indicates that energy is released.

CaO(s) + H2O ⇒ Ca(OH)2

Explanation:

Calcium oxide reacts violently with water, causing it to reach 90 C. It then forms calcium hydroxide, also called slaked lime. It is heated because it releases energy in the form of heat, because the new substance formed (slaked lime) has less internal energy than the original and this is released in the form of heat. As a general rule, acid and base solutions are exothermic.

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Reference the following
Angelina_Jolie [31]

The mass of salt dissolved in 1.0 L of 0.010 M SO₄²⁻ is 0.67 g/l

<h3>How can we Calculate the mass of the salt dissolve in 1.0 L of 0.010 M SO₄²⁻ ?</h3>

To calculate the mass of the salt dissolved, we multiply by the mass of 1 mole to molar solubilty and lets assume we are using the anhydrous salt CaSO₄ for which the Molar Mass (M) = 136.1

Mass of the salt dissolved = Molar solubility x Molar mass

Molar Mass (M) = 136.1

Molar solubility = ?

Formula to find molar solubilty ;

Molar solubility = Square root of Solubity product (Given)

S = \sqrt{2.4  x  10^{-5} }   (Value of Solubity product is given in the question)

    = 4.9 × 10⁻³

 

Mass of the salt dissolved = Molar solubility x Molar mass

                                                 =    4.9 × 10⁻³  x  136.1

                                                         = 0.67 g/l

Learn more about Solubility here ;

brainly.com/question/8591226

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7 0
2 years ago
What was one strategy radical republicans used to achieve their goals for
dsp73

Using the military as a tool was what the radical republicans used to achieve their aim of reconstruction.

<h3>What is Reconstruction?</h3>

This was an event which occurred after the American Civil War in which all the chaos were taken care of and normalcy restored to the country.

The radical republicans ensured rights of the people such as voting were protected through the use of the military force and makes option C the correct choice.

Read more about Reconstruction here brainly.com/question/24761999

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7 0
1 year ago
Read 2 more answers
A scientist discovers remnants of an organism on a slide under his microscope. He can only identify a few components: a large va
postnew [5]

Answer:

Eukaryotic (a plant cell)

Explanation:

The presence of a chloroplast indicates that the cell has membrane-bound organelles. This is not a feature of prokaryotic cells - only eukaryotic cells. Therefore, the cell is eukaryotic. The presence of a large vacuole, chloroplast, and rigid cell wall suggests its a plant cell as plant cells are the only eukaryotes with these features.

6 0
3 years ago
Which of the following statements about density is NOT true?
vazorg [7]

Answer:

<h2>Letter B</h2>

Explanation:

because density is an INTENSIVE PROPERTY not an EXTENSIVE.

7 0
2 years ago
Plsssssssssssssssssssssssssssssssssssssssss
KiRa [710]

Answer:

laurasia and gondwana is the correct answer

7 0
2 years ago
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