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
sertanlavr [38]
2 years ago
10

A scientist compares two samples of white powder. One powder was present at the beginning of an experiment. The other powder was

present at the end. She wants to determine whether a chemical reaction has occurred. She finds that neither sample bubbles or dissolves in water. She measures the mass and volume of the solids. Sample one has a volume of 45 cm3 and a mass of 0.5 g. Sample two has a volume of 65 cm3 and a mass of 1.3 g. What should the scientist conclude?
A)The samples have the same color, so no chemical reaction has occurred.
B)The two samples do not react with water, so no chemical reaction has occurred.
C)The densities of the samples are different, so a chemical reaction has occurred.
D)The densities of the samples are the same, so no chemical reaction has occurred.
E)The densities of the samples are different, so no chemical reaction has occurred.
Physics
1 answer:
Jet001 [13]2 years ago
4 0
Density of powder 1 = 0.5 g / 45 cm^3 = 1/90 g/cm^3
Density of powder 2 = 1.3 g / 65 cm^3 = 1/50 g/cm^3

Therefore the densities of the two powders are different, hence chemical reaction has occurred.

(note: none of the other choices make sense.  In fact, a different density does not necessarily indicate a chemical change, see paragraph below).

Density of powders are not definitive unless they are each of the same size and texture.  For example, granular sugar, rock sugar, and icing sugar all have different densities.  I would conclude that this experiment does not lend to a reliable answer.
You might be interested in
A light bulb is plugged into a wall outlet (220 V) and it uses 0.68 amps. What is the light bulb’s resistance?
Veronika [31]

Answer:

14.96 amps

Explanation:

5 0
2 years ago
What 2 things need to be known about an object in order to determine its kinetic energy?
NikAS [45]
I believe the answer is the mass of the object and the speed at which it is moving. 
7 0
3 years ago
Which of these is outside of the solar system? sun Saturn galaxy moon
pshichka [43]

Our solar system consists of the sun and the 9 planets and their moons.

The galaxy is outside our solar system.

8 0
2 years ago
Read 2 more answers
Monochromatic light from a point source is directed toward the sharp edge of a solid object. How does diffraction change the ima
Anna71 [15]

Did you get the answers the quiz??? If so please write out the answers in the comment section :)

6 0
3 years ago
Read 2 more answers
If a 100 N net force acts on a 50 kg car, what will the acceleration of the car will be?
Allushta [10]
According to newton's law Force = mass * acceleration
so , 100 = 50 * a
so , a= 2 m/s^2
6 0
3 years ago
Other questions:
  • How do exons and introns differ?
    8·1 answer
  • ) What is the regression equation? Remember, use 3 decimal places for ALL answers. mu^^\^y|x = + x (b) What is the estimated mea
    14·1 answer
  • For a Van de Graaff generator to acquire a charge on its surface what must happen?
    10·1 answer
  • How long is a WiFi wavelength?<br><br> A) 10 cm<br><br> B) 12 cm<br><br> C) 15 cm <br><br> D) 20cm
    12·2 answers
  • A 100 kg father and his 50 kg daughter stand on ice skates on a frozen pond. The daughter pushes on her father with a force of 5
    9·2 answers
  • Your toaster has a power cord with a resistance of 2.2x10^−2 Ω connected in series with a 9.7 Ω nichrome heating element. The po
    6·1 answer
  • How do we convert units of distance?<br><br> First answer gets brainliest.
    11·1 answer
  • A string is stretched to a length of 361 cm and both ends are fixed. If the density of the string is 0.039 g/cm, and its tension
    12·1 answer
  • How to convert 8 feet to metres​
    10·2 answers
  • Can someone please answer this, ill give you brainliest and your getting 100 points.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!