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olasank [31]
3 years ago
5

A _____________________ change does not change what a substance is. If heat is added to ice, a physical change occurs because on

ly the _______________ of matter has changed. The term for changing a solid to a liquid is _________________. Adding more heat can turn the water into a gas, or _____________. The term for changing a liquid to a gas is __________________. Changes of state can be reversed as well. A gas turns into a liquid by _____________________. A liquid turns into a solid by ______________________. On very rare occasions, a solid turns into a gas through _____________________. The reverse is a gas turning into solid, or _________________________. ______________________ change produces a new substance because a chemical reaction has taken place. We know baking a cake is a chemical change because the flour, eggs, sugar, and other ingredients cannot be returned to their original structures. We know that a chemical change occurs when heat or ___________________ is released or absorbed, when a ______________ or bubbles form, or when a solid or ________________________ forms
Chemistry
1 answer:
sertanlavr [38]3 years ago
6 0

Answer:

<em>physical, state, melting, vapour, evaporation, condensation, freezing, sublimation, deposition or reverse sublimation, chemical, energy, effevescence and liquids</em><em> are suitable terms to fill the gaps. See the explanaition</em>

Explanation:

Changes of state are physical changes in matter. They are reversible changes that do not involve changes in matter's chemical makeup or chemical properties. Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization. Thus

A <em>________physical_____________ </em>change does not change what a substance is. If heat is added to ice, a physical change occurs because only the <em>______state_________ </em>of matter has changed. The term for changing a solid to a liquid is <em>_____melting____________</em>. Adding more heat can turn the water into a gas, or <em>___vapour__________</em>. The term for changing a liquid to a gas is <em>_______evaporation___________</em>. Changes of state can be reversed as well. A gas turns into a liquid by <em>________condensation_____________</em>. A liquid turns into a solid by <em>_________freezing____________</em>. On very rare occasions, a solid turns into a gas through <em>_______sublimation______________</em>. The reverse is a gas turning into solid, or <em>_______deposition or reverse sublimation___</em>. <em>________chemical______________ </em>change produces a new substance because a chemical reaction has taken place. We know baking a cake is a chemical change because the flour, eggs, sugar, and other ingredients cannot be returned to their original structures. We know that a chemical change occurs when heat or <em>________energy___________ </em>is released or absorbed, when a <em>______effevescence________ </em>or bubbles form, or when a solid or ________<em>liquids</em>________________ forms.

Also note the following points about physical and chemical change.

  • Physical Change

Physical changes are changes in which no bonds are broken or formed. This means that the same types of compounds or elements that were there at the beginning of the change are there at the end of the change. Because the ending materials are the same as the beginning materials, the properties (such as color, boiling point, etc) will also be the same.  A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. When we heat the liquid water, it changes to water vapor. But even though the physical properties have changed, the molecules are exactly the same as before.

  • Chemical Change

Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties. Chemical changes are frequently harder to reverse than physical changes.

One good example of a chemical change is burning a candle. The act of burning paper actually results in the formation of new chemicals (carbon dioxide and water).

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A tablet of Pain Be Gone Aspirin, which had a mass of 1.213 g, was pulverized and 1.159 g were dissolved in 10.0 mL of ethyl alc
Elan Coil [88]

Answer:

a. Moles of NaOH  = 0.001643 moles

b. 0.296 g

c. 0.3098 g

d. Not acceptable

Explanation:

a.

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For NaOH :

Molarity = 0.1052 M

Volume = 15.62 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 15.62×10⁻³ L

Thus, moles of NaOH :

Moles=0.1052 \times {15.62\times 10^{-3}}\ moles

Moles of NaOH  = 0.001643 moles

b.

The reaction of NaOH with the acetylsalicylic acid is in the ratio of 1:1.

Thus, Moles of NaOH = Moles of acetylsalicylic acid = 0.001643 moles

Molar mass of acetylsalicylic acid = 180.16 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Mass = Moles * Molar mass = 0.001643 moles * 180.16 g/mol = 0.296 g

c.

1.159 g of sample contains 0.296 g of acetylsalicylic acid

1.213 g of sample contains \frac{0.296}{1.159}\times 1.213 g of acetylsalicylic acid

Mass of acetylsalicylic acid = 0.3098 g = 309.8 mg

d. Sample contains = 309.8 mg

Manufacturer claiming = 315 mg to 335 mg

Thus , it is not acceptable.

5 0
3 years ago
Describe what is happening in this chemical equation: Al2(SiO3)3 + NaOH → Na(SiO3)3 + Al2OH Please Help ASAP
WITCHER [35]

Answer:

Double replacement reaction

Explanation:

This is what is known as a double replacement reaction. The two parts of each molecule separate and recombine to form two new compounds. For instance, Al_2(SiO_3)_3 separates into Al_2 and (SiO_3)_3, while NaOH separates into Na and OH, and then they recombine with the other compound.

Hope this helps!

7 0
3 years ago
Read 2 more answers
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Tom [10]

Answer:Sunlight

Explanation:

5 0
3 years ago
A chemical equation is shown:
taurus [48]

 The number  of  oxygen atoms  are 6  atoms


  <u><em>Explanation</em></u>

According to the law of mass conservation the number of  reactant atoms   is equal to  number  of product atoms.

For  given equation  to  obey  the  law of mass  conservation  it need to be balanced as below

4 Al + 3 O₂ → 2 Al₂O₃

Al₂O₃  is the  product,therefore the number of oxygen atom

= coefficient  in front  of   Al₂O₃   ×  subscript  of O

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7 0
3 years ago
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Which angles form an adjacent pair?
Arisa [49]
I think the answer is A
3 0
3 years ago
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