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
k0ka [10]
3 years ago
15

When a log burns in a fire, a a physical change has occurred. b mass is gained. c new substances are formed.

Chemistry
2 answers:
Pavlova-9 [17]3 years ago
8 0

Answer: technically it is chemical and physical change

Explanation: chemical bc it’s burning and physical bc it’s going from a log to ashes

Zepler [3.9K]3 years ago
5 0

Answer:

C! New substances are formed.

Explanation:

The burning log will release carbon dioxide, which is a new substance that was never there in the first place.

You might be interested in
The gravitational strength at te poles is greater than the gravitational strength at the equator. what will happen to an object
amid [387]

Answer:

4

Explanation:

The weight will decrease.

Because the value of acceleration due to gravity is decreasing thus the weight of object will also decrease.

4 0
3 years ago
Energy transfer by convection is usually restricted to what type of substance? A. Solids only
Lunna [17]

My thought would be B) gases.

I could be wrong but that's what i'd say


4 0
4 years ago
What is the amount, in moles, of each elemental sample? a. 11.8 g Ar b. 3.55 g Zn c. 26.1 g Ta d. 0.211 g Li
spayn [35]

Answer:

A. 0.295 mole

B. 0.055 mole

C.0.144 mole

D. 0.03 mole

Explanation:

To find the amount in moles, we simply use a mathematical relation that connects mass, atomic mass and number of moles.

Number of moles = mass/atomic mass

A. Atomic mass of Argon is 40

n = 11.8/40 = 0.295 mole

B. Atomic mass of zinc is 65

n = 3.55/65 = 0.055 mole

C. Atomic mass of Tantalum is 181

n = 26.1/181 = 0.144 mole

D. Atomic mass of lithium is 7

n = 0.211/7 = 0.03 mole

8 0
3 years ago
A solar panel combines multiple photovoltaic cells. Which type of energy is used to power a solar panel?
Softa [21]

Explanation:

<u>Photovoltaic means electricity from light</u>

photo = <em>light </em> voltaic = <em>electricity</em><em> </em>

<u>SUNLIGHT</u> is the answer

Hope this is correct

HAVE A GOOD DAY!

3 0
3 years ago
Read 2 more answers
Vegetable oil has a specific heat of 1.67/* Calculate the heat required (in kilojoules) to raise the temperature of 500 g of
Nady [450]

Answer:

Q=108.55kJ

Explanation:

Hello,

In this case, we can compute the required heat by using the following equation:

Q=mCp(T_2-T_1)

Thus, by considering the given mass, specific heat and both initial and final temperature, we obtain:

Q=500g*1.67\frac{J}{g\°C} *(150.0\°C-20.0\°C)*\frac{1kJ}{1000J} \\\\Q=108.55kJ

Regards.

5 0
3 years ago
Other questions:
  • Which statement correctly describes potassium iodide, KI? There is a one-to-one ratio of potassium ions to iodide ions. Potassiu
    9·2 answers
  • Whitch of the following is a true statement about the magnetic field between two magnets
    6·1 answer
  • When molten rock undergoes crystallization above ground, what type of rock results?
    7·2 answers
  • Metals are used in many products because of the characteristic properties that most metals have. Which product requires the high
    8·2 answers
  • Convert 254 ml in kg
    6·1 answer
  • Pleaseeee helllpppp! I really need it!
    11·2 answers
  • Covert 81 .2ml to L<br> I’ll mark you as brainlister
    8·1 answer
  • Any material that exerts magnetic force is considered a magnet true or false?
    8·1 answer
  • Elements found on the left side of the Periodic Table are known as
    14·2 answers
  • What effect would the chemical in a bee sting have on litmus paper?​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!