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
Phantasy [73]
3 years ago
6

Which set of procedures and observations indicates a chemical change?

Chemistry
1 answer:
Flauer [41]3 years ago
4 0
The answer is (4), (3) is merely a change in composition, thus not chemical but physical.

Answer: (4).
You might be interested in
Plants get energy from the​
Rainbow [258]

Answer:

Plants need energy from the sun, water from the soil, and carbon from the air to grow. Air is mostly made of nitrogen, oxygen, and carbon dioxide. So how do plants get the carbon they need to grow? They absorb carbon dioxide from the air.

please make most brainlyest

4 0
2 years ago
A sample of xenon gas occupies a volume of 6.80 L at 52.0°C and 1.05 atm. If it is desired to increase the volume of the gas sam
Pavlova-9 [17]

Answer:

207.03°C

Explanation:

The following data were obtained from the question:

V1 (initial volume) = 6.80 L

T1 (initial temperature) = 52.0°C = 52 + 273 = 325K

P1 (initial pressure) = 1.05 atm

V2 (final volume) = 7.87 L

P2 (final pressure) = 1.34 atm

T2(final temperature) =?

Using the general gas equation P1V1/T1 = P2V2/T2, the final temperature of the gas sample can be obtained as follow:

P1V1/T1 = P2V2/T2

1.05 x 6.8/325 = 1.34 x 7.87/T2

Cross multiply to express in linear form as shown below:

1.05 x 6.8 x T2 = 325 x 1.34 x 7.87

Divide both side by 1.05 x 6.8

T2 = (325 x 1.34 x 7.87) /(1.05 x 6.8)

T2 = 480.03K

Now, let us convert 480.03K to a number in celsius scale. This is illustrated below:

°C = K - 273

°C = 480.03 - 273

°C = 207.03°C

Therefore, the final temperature of the gas will be 207.03°C

5 0
3 years ago
While viruses are not living organisms, they do share some characteristics with living organisms such as bacteria and fungi. Whi
Rufina [12.5K]

viruses are made of proteins and contain genetic information to produce more of them in the form of DNA or RNA.

7 0
3 years ago
Read 2 more answers
NO2+H4➡2 H2O+N What are the elements
Firdavs [7]
They are nitrogen, oxygen, hydrogen
6 0
3 years ago
Read 2 more answers
Which are always the first waves of an earthquake to be detected?
frez [133]

Answer:

The first kind of body wave is the P wave or primary wave.

Explanation:

This is the fastest kind of seismic wave, and, consequently, the first to 'arrive' at a seismic station.

6 0
3 years ago
Other questions:
  • What do colligative properties depend on?
    10·2 answers
  • At 50 degrees celcius and standard pressure intermolecular forces of attraction are strongest in a sample of
    12·2 answers
  • Can anyone give me the name of these? 40 points. Hope it's not too much
    14·1 answer
  • All of the following are diatomic molecules except? a)H b)Br c) CI d)S
    10·2 answers
  • Water boils at what degrees Celsius
    15·2 answers
  • How can you write noncontact force in a sentence
    7·1 answer
  • Arrange the events in the life of a star in the correct order.
    14·1 answer
  • Did they scientist believe in God
    5·1 answer
  • Why is the speed of these particles deffirent in each state
    12·1 answer
  • what is the name of n2cl4? explain how you determined the bond type and the steps you used to determine the naming convention fo
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!