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
Elena L [17]
3 years ago
13

SCIENCEEEE!!!!! HELPPPP!!!!

Chemistry
2 answers:
Wittaler [7]3 years ago
7 0

Answer:

I would say Both are only physical changes.

Explanation:

Melting wax isn't creating a new substance, or changing the atomic structure. The wax is only changes from a solid to a liquid state. Sanding a piece if wood is usually done with sandpaper, which can physically be done with your hands. Hope this helped :)

IRINA_888 [86]3 years ago
5 0

pretty sure it's both are physical changes.

You might be interested in
What kind of air mass will bring cold, dry weather as it moves toward an area
sergij07 [2.7K]

Answer:

i think the answer is Continental polar air masses

Explanation:

4 0
2 years ago
Water has a higher boiling point than acetone does. Which of the following statements about water and acetone in the liquid stat
Semenov [28]

Answer:

Water's boiling point is higher than acetone's one due to the stronger intermolecular forces it has in liquid phase.

Explanation:

Hello.

In this case, since no options are given we can infer from the statement that due to water's higher boiling point than acetone we can conclude that when they are in liquid state, water has stronger intermolecular forces which allow its particles to be held in a stronger way in comparison to the acetone's molecules, for that reason, more energy will be required in order to separate them and promote the boiling process, which is attained via increasing the temperature. Besides, less energy will be required for the separation of the acetone's molecules in order to boil it when liquid, therefore, a lower temperature is required.

In such a way, we can sum up that water's boiling point is higher than acetone's one due to the stronger intermolecular forces it has in liquid phase.

Regards.

7 0
4 years ago
I could really use some help with this question, thank you in advance!​
Taya2010 [7]
C because
Explanation Plato
6 0
3 years ago
777 Joules of energy are applied to 25.0 grams of each of the following materials, which
4vir4ik [10]

Answer:

I think copper

Explanation:

Material IACS % Conductivity

Silver                105

Copper            100

Gold               70

Aluminum         61

Nickel              22

Zinc                          27

Brass                  28

Iron                        17

Tin                      15

Phosphor Bronze  15

Lead                      7

Nickel Aluminum Bronze 7

Steel                   3 to 15

the table might help- your indian brother

3 0
3 years ago
Fe(NO3)2 not sure how to get the oxidation numbers of all elements
Shtirlitz [24]
You must remember that oxidation number of hydrogen in acids is always +1, oxidation number of oxygen in oxides & acids is always -2... metals has always oxidation number on plus!

group NO3 comes from HNO3...and oxidation number of whole acid group is always on minus and equal to the amount of hydrogen atoms in this acid... so oxidation number of NO3 = -1

we have 2 NO3 groups so 2*(-1) = -2 and that is the reason why oxidation number of Fe in this formula must be +2... because sum of all elements always gives 0!

Now we could count of oxidation number for nitrogen... we write HNO3 and start counting from right to left:
3*(-2) from oxygens + 1 from hydrogen = -5
so nitrogen must have +5 oxidation number... because sum all in formula must be 0.


4 0
3 years ago
Other questions:
  • Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions.
    15·2 answers
  • What is the mass of 3.75 moles of potassium (K)?
    12·1 answer
  • 8. An atom has 9 protons, which element is it?​
    14·2 answers
  • How many moles of calcium (Ca) atoms are there in 77.4 g of Ca?
    12·2 answers
  • PLEASE HELP ME PLEASE!!!!!!!!
    6·1 answer
  • What is the term for electrons that are not held within a bond?
    11·1 answer
  • 18. Make Q the subject of the equation E = QxV U
    15·1 answer
  • Which element has seven energy levels?
    9·1 answer
  • What is the average of the two weights of a nickel and dime. Dime is 2.26g and nickel is 4.97g?
    10·1 answer
  • What is another name for the sugars organisms use for energy?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!