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
dybincka [34]
3 years ago
14

which of these is an example of a chemical change A breaking glass B mealting ice on a windshield C burning gasoline D denting a

bumper
Chemistry
2 answers:
Nonamiya [84]3 years ago
7 0

Lets do process of elimination!

A. Breaking glass - That is a psychical change because if you break it, it is still glass. It didn't change to another substance.

B. Melting ice on a windshield - During the melting process, there is no chemical change, and therefore, no new substance is created.  

C. Burning gasoline - When gas burns it usually combines with oxygen to give carbon dioxide, water etc.  It is a chemical change.

D. Denting a bumper - The bumper is still a bumper, only thing is it has a dent in it. The properties did not change, meaning no chemical change.

sertanlavr [38]3 years ago
4 0

Answer: Option (C) is the correct answer.

Explanation:

Explanation:

A chemical change is defined as the change which tend to show difference in chemical composition of a substance.

For example, toxicity, reactivity, combustion etc are all chemical properties.

A chemical change will always lead to the formation of a new compound and this change is irreversible in nature by any physical means.

When gasoline burns then combustion takes place which causes a chemical change.

On the other hand, a change which is unable to bring any difference in chemical composition of a substance is known as a physical change.

For example, change in shape, size, mass, volume etc are all physical properties.

Physical changes are reversible in nature.

Thus, we can conclude that out of the given options burning gasoline is an example of a chemical change.

You might be interested in
What is a system of knowledge and the methods of find that knowledge
Lena [83]

Answer:

A system of knowledge and the methods to find that knowledge is Science.

7 0
3 years ago
An FAS calibration curve (absorbance, y-axis vs. FAS in g/mL) gave an equation he regression line of: y-3678(x)+0.056. If an unk
mezya [45]

Answer:

FAS concentration = 1.61*10^-4M

Explanation:

Beer Lambert's law relates the absorbance (A) of a substance to its concentration (c) as:

A = \epsilon lc----(1)

where ε = molar absorption coefficient

l = path length

A plot of 'A' vs 'c' gives a straight line with slope = εl

In addition absorbance (A) is related to % Transmittance (%T) as:

A = 2-log%T----(2)

For the FAS solution, the corresponding calibration fit is given as:

y = 3678(x) + 0.056

This implies that the slope = εl = 3678

It is given that %T = 25.6%

A = 2-log(25.6)=0.592

Based on equation(1):

c = \frac{A}{\epsilon l}=\frac{0.592}{3678}=1.61*10^{-4}M

8 0
2 years ago
What is the total number of sublevels in the fourth principal energy level
Yuki888 [10]
The answer is 4. It can hold 4 sublevels as s.p,d,f and it holds 32 electrons
8 0
3 years ago
An apple is placed on a scale. the scale shows that the apple weighs 1/4 a pound. this demonstrates that the apple has
Murljashka [212]
D  is your answer. nearly everything has atoms so it cant be that 
3 0
3 years ago
59x<br> 56x<br> 35<br> 35<br> What do they have in common
wel

Answer:

5

Explanation:

They have 5 in common but different x

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement best describes a mole?
    10·2 answers
  • Of the objects below, ________ is the most dense. Of the objects below, ________ is the most dense.
    12·1 answer
  • What results electrons into having light produced by neon gas?
    12·1 answer
  • 2 Points<br> What kind of bond would many atoms of the same metal make?
    15·1 answer
  • ! WILL GIVE BRAINLIST !
    13·1 answer
  • a chemist reacts 150.0 grams of HCl with an excess of MnO2. if the following reaction occurs: MnO2+4HCl=MnCl2+2H2O+Cl2 how many
    12·2 answers
  • The mineral rhodochrosite [manganese(II) carbonate, MnCO3] is a commercially important source of manganese. Write a half-reactio
    7·1 answer
  • Question 24
    10·1 answer
  • What is the longest day of the year?
    14·2 answers
  • What are the names of those?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!