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
xxTIMURxx [149]
3 years ago
9

3.

Chemistry
1 answer:
Katena32 [7]3 years ago
6 0

Answer:

it's A endothermic its when two objects rub each other to form heat this is also known as friction force

You might be interested in
Where are Uranium and plutonium found? (IN NATURE)
Basile [38]

Wanted to write more both there is a problem with the editor. Uranium is formed naturally in the crust of rocks and seawater. Plutonium does not occur in nature. It is found in the biosphere. 


8 0
2 years ago
Read 2 more answers
What did Rutherford’s gold foil experiment indicate?
Klio2033 [76]
The answer would be D. 
4 0
3 years ago
A scientist observed a 5-mL sample of an unknown substance. It is a blue liquid with a density of 1.2 g/cm. the substance reacts
LenaWriter [7]
Characteristic properties can be used to describe and identify the substances, while non-characteristic properties, although can be used to describe the substances, cannot be used to identify them.

Temperature, mass, color, shape and volume are examples of non-characteristic properties.

Density, boiling point, melting point, chemical reactivity are examples of characteristic properties.

List of the properties observed by the scientist:
-----------------------------------------------------------------
Property                                     Type of property
----------------------------------------------------------------
Volume: 5 ml                              non-characteristic
----------------------------------------------------------------
Color: blue                                 non-characteristic
----------------------------------------------------------------
State: liquid                                characteristic
------------------------------------------------------------
density: 1.2 g/cm                        characteristic
------------------------------------------------------------
Reaction: reacts with CO2         characteristic
----------------------------------------------------------
5 0
3 years ago
Which of the following compounds contains the lead (iv) ion?
Oliga [24]
Oxidation state of Pb in PbO2 is +4.
Oxidation state of Pb in PbCl2 is +2.
Oxidation state of Pb in Pb2O is +1.
Oxidation state of Pb in Pb4O3 is +6/4.

Hence option A. PbO2 is correct.
Hope this helps, have a nice day!
6 0
3 years ago
Read 2 more answers
What is the definition of a homogeneous mixture?
sammy [17]

Answer:

A homogenous mixture is a mixture that is uniform in composition. This means that you cannot apart the individual elements that make up the mixture.

Explanation:

5 0
3 years ago
Other questions:
  • HELPPPPPP<br><br> Cracking of heptane please help! Show the chemical formula and the diagrams
    15·1 answer
  • Combustion reactions are most conveniently studied _____. hints combustion reactions are most conveniently studied _____. there
    13·1 answer
  • If you purchased 2.31 μCi of sulfur-35, how many disintegrations per second does the sample undergo when it is brand new?
    11·1 answer
  • Give an example of one type of energy conversion (change to another form). Be sure to explain your example.
    11·1 answer
  • Earth is unique because it _____. has only one satellite has the largest satellite in the solar system is located outside the as
    6·2 answers
  • Solve for b, when c= a/b and a = 5.8 and c= 7.4
    11·1 answer
  • What is the weight of a 30.0 kg object?<br> 3.0 N<br> 300 N<br> 6.8 N<br> 132 N
    10·2 answers
  • A planet similar to Earth has four moons roughly the same distance away. The moon that will MOST affect tides on the planet is t
    13·2 answers
  • Plz help with Chemistry Quiz I’ll mark brainliest
    7·1 answer
  • CaCN2 + 3H20 - CaCO3 + 2NH3
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!