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
Basile [38]
3 years ago
7

A __________ has distinct properties and composition that never vary. A) solution B) molecule C) pure substance D) heterogeneous

mixture
Physics
2 answers:
Nataly [62]3 years ago
8 0
Matter is defined as anything that has mass and occupies space, it may be classified into three states, solid, liquids or gases. Molecules is the smallest particle of an element that has the chemical properties of the element or the compound. it contains two or more atoms that are joined together. A pure substance is a matter that has distinct properties and a composition that does not vary from sample to sample. Thus the correct answer is C
sweet-ann [11.9K]3 years ago
6 0

Answer:

C) pure substance

Explanation:

Pure substance is any substance formed by only one type of molecule, of invariable and homogeneous chemical composition, which has constant physical and chemical properties. Pure substance may exist in more than one phase, but in such cases the phase composition will be the same.

In short, pure substance is all material with the following characteristics:

  • Structural units (molecules, ionic assemblies) chemically equal to each other.
  • Fixed composition, resulting in fixed properties such as density, melting and boiling point, etc. That is, these substance have distinct properties and composition that never vary.
  • The temperature remains unchanged from the beginning to the end of all your physical state changes (melting, boiling, solidifying, etc.).
You might be interested in
If the light wave has a wavelength of 10m what would be its velocity
s2008m [1.1K]

If this case could ever happen, the speed would follow from this formula:

v = f \cdot \lambda

with f the frequency and lambda the wavelength. We are give a wavelength of 10m. The frequencies of the visible light can range between 400 to about 790 Terahertz, so let us pick a middle point of 600 THz ("green-ish") as a "representative."

v = 600THz\cdot 10m = 6\cdot 10^{14} \frac{1}{s}\cdot 10 m = 6\cdot10^{15}\frac{m}{s}

The speed of such a wave would have to be 6e+15 m/s (which would be 7 orders of magnitude higher than the universal speed of light constant)

7 0
3 years ago
Read 2 more answers
A student increased the resister of the voltmeter year not the circuit
Flura [38]

Answer:

Say the full question I can't understand what it is

3 0
3 years ago
A hummingbird can flutter its wings 4,800 times per minute.
Marianna [84]
80 flutters per second
4 0
3 years ago
Read 2 more answers
Eating 2500 Cal every day a friend of mine maintains a stable weight of 70 kg. One day, after eating 3500 Cal, he decided to do
Kaylis [27]

Answer:

Explanation:

Calories to be burnt = 3500 - 2500 = 1000 Cals .

Efficiency of conversion to mechanical work  is 25 % .

Work needed to burn this much of Cals = 1000 x 100 / 25 = 4000 Cals.

4000 Cals = 4.2 x 4000 = 16800 J  .

Work done in one jump = kinetic energy while jumping

= 1/2 m v²

= .5 x 70 x 3.3²

= 381.15 J .

Number of jumps required = 16800 / 381.15

= 44 .

4 0
2 years ago
Lisa is conducting an investigation to determine the coefficient of friction between two surfaces. She uses a 25 kg block. What
Paladinen [302]

Answer:

245.25

Explanation:

1 kg is 9.81 newtons

4 0
3 years ago
Read 2 more answers
Other questions:
  • An rv travels 45 km east and stays the night at a KOA. The next day it travels for 3 hours to the north l, traveling 110 km. Wha
    5·1 answer
  • What can happen if a body moves through speed of light
    14·2 answers
  • Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space?
    9·1 answer
  • (LC)Light fixtures and placement that create shadows on the set, that obscure or completely hide action in certain areas of the
    13·1 answer
  • An elevator accelerates upward at 1.2 m/s 2 . the acceleration of gravity is 9.8 m/s 2 . what is the upward force exerted by the
    13·1 answer
  • A person stands on a scale in an elevator. his apparent weight will be the greatest when the elevator:
    8·2 answers
  • Matter that emits no light at any wavelength is called
    11·2 answers
  • What do tendons connect skeletal muscles to?​
    5·2 answers
  • C. If you knew the pressure, volume, and temperature of the air in the
    15·1 answer
  • explain how the composition of a star that will form a billon years in the future will differ the composition of our sun.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!