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
oksano4ka [1.4K]
2 years ago
5

Classify each of the following as either a physical change or a chemical change:

Chemistry
2 answers:
Nady [450]2 years ago
7 0
A and B are both physical changes. The paper is still paper and the wax is still wax. C and D are both chemical changes. You are changing the log when you burn it. It is no longer a log after it is burned completely and the milk cannot be good after it has went sour. It can’t be changed back.
Taya2010 [7]2 years ago
3 0

Answer:

physical change

a b c

chemical change

d

You might be interested in
If a chemist has 17.8 moles of N2H4O3, what is the mass of the sample?<br><br> show work plz
harkovskaia [24]

(\frac{17.8mole}{1} )( \frac{66grams}{1mole} ) \:  \:  \:  \:  17.8 \times 66 = 1.17 \times  {10}^{3} grams
the way that you get 66 is by adding he atomic mass unit of each atom in the formula. so N2 is 14 + 14 H4 is 1 * 4 and 03 is 16 * 3
4 0
2 years ago
The chemical equation provided shows iron rusting to form iron oxide. Use the drop-down menu to choose the coefficients that wil
olchik [2.2K]

4Fe + 3O2 → 2Fe2O3 <or> The chemical formula for rust is Fe2O3. Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe2O3. Water is necessary for the oxidation reaction to occur and to facilitate transport of the electrons.

3 0
3 years ago
Read 2 more answers
For which characteristic would a human MOST LIKELY selectively breed a house cat?
madreJ [45]
B. Coat color I’m pretty sure
8 0
3 years ago
Read 2 more answers
A. If both Assertion &amp; Reason are true and the reason is the correct explanation of the assertion. B. If both Assertion &amp
Neporo4naja [7]

Answer:

C. If Assertion is true statement but Reason is false.

Explanation:

The burning of magnesium in air produces magnesium oxide as shown by the equation;

2Mg(s) + O2(g) -----> 2MgO(s)

The magnesium oxide solid is recovered as a white ash. This is a typical example of an oxidation reaction which is also a combustion reaction.

The reason has nothing at all to do with the assertion hence the answer given.

Magnesium oxide is basic just like the oxides of other metals and dissolves in water to yield an alkali.

8 0
3 years ago
Read 2 more answers
Can anyone help me with this moon TGA?
kherson [118]

Answer:

i wont le me down load it

Explanation:

8 0
3 years ago
Other questions:
  • A container of hydrogen at 172 kPa was decreased to 85.0 kPa producing a new volume of 3L. What was the original volume?
    15·1 answer
  • Elements on the periodic table are organized by what?
    12·2 answers
  • A student decreases the temperature of 556 cm^3 balloon from 278 K to 231 K. Assuming constant pressure, what should the new vol
    10·1 answer
  • Match the atoms which might substitute for one another. Match the items in the left column to the items in the right column.
    8·2 answers
  • Which of the following is the best description of natural selection?
    10·1 answer
  • How does a sample of helium at 15 degree Celsius compare to a sample of helium at 215 K?
    12·2 answers
  • At 3 atm pressure the volume of gas is 1200ml. What pressure is required to reduce the volume of the gas to 300ml if the tempera
    9·1 answer
  • 0.007 decigrams = ? micrograms
    7·1 answer
  • The critical role of the atmosphere is best described as ?
    15·1 answer
  • What role does weathering have in shaping Earth’s surface?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!