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
zysi [14]
3 years ago
6

Which of these BEST describes a physical change?

Chemistry
1 answer:
OLEGan [10]3 years ago
8 0

Answer:

C) a log in the campfire turns into ashes

You might be interested in
How many moles of Fluorine (F2) are<br><br> needed to completely react 8.0<br><br> moles of NF3?
Anna [14]

Answer:

12 moles of F₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

N₂ + 3F₂ —> 2NF₃

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of NF₃.

Finally, we shall determine the number of mole of F₂ needed to produce 8 moles of NF₃. This can be obtained as illustrated below:

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of NF₃.

Therefore, Xmol of F₂ will react to produce 8 moles of NF₃ i.e

Xmol of F₂ = (3 × 8)/2

Xmol of F₂ = 12 moles

Thus, 12 moles of F₂ is needed for the reaction.

8 0
3 years ago
Linda is learning how to bowl and
raketka [301]
The answer is a throw the ball with greater force
5 0
3 years ago
A gas has a volume of 45.0 mL and a pressure of .98 atm. If the pressure increased to 2.1 atm and the temperature remained the s
goblinko [34]

Answer: The new volume is 95.45 mL.

Explanation:

Given: V_{1} = 45.0 mL,         P_{1} = 0.98 atm

P_{2} = 2.1 atm,               V_{2} = ?

According to Boyle's law, at constant temperature the pressure of a gas is inversely proportional to its volume.

Therefore, formula used to calculate the new volume is as follows.

\frac{P_{1}}{V_{1}} = \frac{P_{2}}{V_{2}}

Substitute the values into above formula as follows.

\frac{P_{1}}{V_{1}} = \frac{P_{2}}{V_{2}}\\\frac{0.98 atm}{45.0 mL} = \frac{2.1 atm}{V_{2}}\\V_{2} = 95.45 mL

Thus, we can conclude that the new volume is 95.45 mL.

7 0
4 years ago
How does a temperature rain forest differ from the taiga
nadya68 [22]
<span>It is cold in Taiga and it doesn't rain a lot, It snows a lot</span>
7 0
3 years ago
Read 2 more answers
How is it possible for scientists to do studies about things that happened?
Levart [38]

Because they can look at the fossils that they left behind and see what kind of animal it was and what happened to it if another animal is inside of the fossil or if the bones are misplaced

6 0
3 years ago
Other questions:
  • What is thr total of all the forces on an object .
    7·1 answer
  • The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called
    9·2 answers
  • All of the cells in the body need oxygen. Hemoglobin molecules in red blood cells transport oxygen through the bloodstream. Oxyg
    9·1 answer
  • A parachute on a racing dragster opens and changes the speed of the car from 85 m/s to 45 m/s in a period of 4.5 seconds. What i
    6·1 answer
  • What is the molarity of a solution that contains 4 mols of sugar in 4 liter of solution?
    8·1 answer
  • 3. Determine the moles of sodium, Na, containing 7.9x1024 atoms.​
    7·1 answer
  • If food spoils is this a chemical or physical change?
    13·2 answers
  • Sodium hydroxide solution reacts with copper (II) nitrate solution to produce a
    10·1 answer
  • Cuáles son las características y funciones de los organismos
    12·1 answer
  • What are three formulas which describe the relationship between mass,force and acceleration
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!