1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alenkasestr [34]
3 years ago
10

What is a chemical change?

Chemistry
2 answers:
topjm [15]3 years ago
8 0

Answer:

Burning of paper and log of wood.

Digestion of food.

Boiling an egg.

Chemical battery usage.

Electroplating a metal.

Baking a cake.

Milk going sour.

Various metabolic reactions that take place in the cells.

Explanation:

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

yarga [219]3 years ago
8 0
A chemical change is results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.
Examples are
- burning
- rotting
- rotting
- cooking
- rusting
The difference between a physical change and a chemical change is a physical change is when matter changes form and the properties stay the same like the molecules and atoms but chemical reaction change different properties and their atoms and molecules change.
Why physical properties change because of temputare I think I am unsure of this questions sorry I hope this solved your answers !
You might be interested in
magine that an uncharged pith ball is brought into the electrostatic field of a charged rod. The side of the pith ball closest t
ivanzaharov [21]
Answer: option <span>D. be given a positive charge produced by the movement of electrons to the other end of the ball.
</span>

Explanation:


This phenomenon is called electrostatic induction.


The excess of negative charge on the end of the rod will repel the electrons on the side of the pith ball that have been approached to it.

Then the electrons on the pith ball will move far away from this end with it will be left an excess of positive charge.

In this way the rod has induced that the ball acquires a positive charge on one end and a negative charge on the other end.
<span />
4 0
3 years ago
Acids and bases can neutralize each other in double displacement reactions. For example, if hydrogen chloride (a strong acid, HC
scoray [572]

Answer:

The answer to your question is    HCl  +  NaOH   ⇒   NaCl  +  H₂O

Explanation:

Data

Double displacement reaction

Balanced chemical reaction

               HCl  +  NaOH   ⇒   NaCl  +  H₂O

           Reactants           Elements                Products

                 1                  Chlorine (Cl)                    1

                 1                   Sodium (Na)                   1

                 2                 Hydrogen (H)                  2

                 1                   Oxygen (0)                      1

As we can see, the reaction is balanced and the coefficients of all reactants and products are 1, but the number is not written in a balanced reaction.

8 0
3 years ago
Consider the reaction: 2 SO2(g)+O2(g)→2 SO3(g) If 285.5 mL of SO2 reacts with 158.9 mL of O2 (both measured at 315 K and 50.0 mm
Tanzania [10]

Answer:

a. Oxygen is the limiting reagent. n_{SO_3}^{Theoretical}=8.096x10^{-4}mol SO_3

b. Y=58.9%

Explanation:

Hello,

a. Limiting reagent and sulfur trioxide's theoretical yield.

At first, we must compute the involved moles for both sulfur dioxide's and oxygen's as follows, considering the volumes in liters and the pressure in atm of 50.0mmHg*1atm/760mmHg=0.0658atm:

n_{SO_2}=\frac{PV}{RT}=\frac{0.0658atm*0.2855L}{0.082\frac{atm*L}{mol*K}*315K} =7.273x10^{-3}molSO_2 \\n_{O_2}=\frac{PV}{RT}=\frac{0.0658atm*0.1589L}{0.082\frac{atm*L}{mol*K}*315K} =4.048x10^{-4}molO_2

Afterwards, by considering the properly balanced chemical reaction:

2SO_2(g)+O_2(g)-->2SO_3

We compute the oxygen's moles that completely reacts with the previously computed 7.273x10^{-3} moles of SO_2 as follows:

7.273x10^{-3}molSO_2*\frac{1molO_2}{2molSO_2} =3.6365x10^{-3}molO_2

That result let us know that the oxygen is the limiting reagent since just 4.048x10^{-4} moles are available in comparison with the 3.6365x10^{-3} moles that completely would react with 7.273x10^{-3} moles of SO_2.

Now, to compute the theoretical yield of sulfur trioxide, we apply the following stoichiometric relationship:

n_{SO_3}^{Theoretical}=4.048x10^{-4}molO_2*\frac{2molSO_3}{1molO_2} =8.096x10^{-4}mol SO_3

b. Percent yield.

At first, we must compute the collected (real) moles of sulfur trioxide:

n_{SO_3}^{real}=\frac{PV}{RT}=\frac{0.0658atm*0.1872L}{0.082\frac{atm*L}{mol*K}*315K} =4.769x10^{-4}molSO_3

Finally, we compute the percent yield:

Y=\frac{n_{SO_3}^{real}}{n_{SO_3}^{Theoretical}} *100%

Y=\frac{4.769x10^{-4}mol SO_3}{8.096x10^{-4}mol SO_3} *100%

Y=58.9%

Best regards.

7 0
3 years ago
Read 2 more answers
What is the molarity of a solution made from 325.4 g of AlCl3 (MM 133.34 g/mol) to make 500.0 mL?
NISA [10]

Answer : The molarity of a solution is, 4.88 M

Explanation : Given,

Mass of AlCl_3 = 325.4 g

Volume of solution = 500.0 mL

Molar mass of AlCl_3 = 133.34 g/mole

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Mass of }AlCl_3\times 1000}{\text{Molar mass of }AlCl_3\times \text{Volume of solution (in mL)}}

Now put all the given values in this formula, we get:

\text{Molarity}=\frac{325.4g\times 1000}{133.34g/mole\times 500.0mL}=4.88mole/L=4.88M

Therefore, the molarity of a solution is, 4.88 M

6 0
3 years ago
Read 2 more answers
When an apple falls from a tree, when does gravity act on the apple?
MrMuchimi
Gravitation Potential energy is converted into the Kinetic Energy, when it just reaches the ground. Some amount of energy is wasted in sound and heat energy when it strikes the ground. When the apple falls from the tree, it has some gravitational potential energy due to its height.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which elements did you include in your question? Check all that apply.
    12·1 answer
  • What are 3 physical properties of aluminum foil
    8·1 answer
  • How are physical and chemical changes different
    8·2 answers
  • What is the role of shrimp with respect to salmon in him food chain
    14·2 answers
  • Given atomic weight, density, atomic radius, how do you crystal structure
    13·1 answer
  • ¿porque es mas dificil erradicar la mineria ilegal que las minerias de grandes empresas?
    7·1 answer
  • Which color of light bends the least when passing through a prism?
    13·1 answer
  • An element's most stable ion forms an ionic compound with chlorine, having the formula XCl2. If the ion of element X has a mass
    11·1 answer
  • A 0.450 g sample of impure CaCO3(s) is dissolved in 50.0 mL of 0.150 M HCl ( aq ) . The equation for the reaction is CaCO3 ( s )
    8·1 answer
  • Anyone know a simple way to describe friction not the definition online, just what you think
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!