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
Dmitry [639]
3 years ago
5

Which of the following is NOT an example of a physical change? *

Chemistry
1 answer:
Oksana_A [137]3 years ago
8 0

Answer:

burning paper

Explanation:

You might be interested in
20 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Amanda [17]
The KE can be solve using the formula:
ke = 0.5 mv^2
where m is the mass of the object
v is the velocity
ke = 0.5 ( 2 kg ) ( 5 m/s)^2
ke = 25 J

the GPE can be solved using the formula:
GPE = mgh
where m is the mass
g is the acceleration due to gravity ( 9.81 m/s^2)
h is the height

GPE = ( 4 kg)(9.81 m/s^2)( 40 m)
GPE = 392.4 J
4 0
3 years ago
Concerning the 10.0 mL of 0.50 M NaCl to 100 mL of solution: When a solution is diluted, does it change the number of moles diss
Mars2501 [29]

No, the dilution does not change the number of moles dissolved

Explanation:

We can see that,

The molarity of the solution was 0.50 M

The volume of the solution is 10 ml.

No of moles of the solute was= volume * concentration

                                                   = 10 X 10^-3* 0.50

                                                     = 5*10^-3 moles

When the solution is diluted from 10 ml to 100ml, the molarity or concentration  changes but number of moles remains constant.

The molarity of 100 ml solution will be

c=n/V

  = 5*10^-3*/100*10^-3

  = 0.05

  when the solution is diluted to 100ml from 10 ml molarity changes from 0.5M TO 0.05 M

8 0
3 years ago
Read 2 more answers
The third number on a fertilizer analysis indicates the amount of which element as being present in the product
Elza [17]
<span>Most fertilizer bags are marked with three numbers, which represent the amounts of the following chemicals: nitrogen, phosphorus, and potassium. The third number represents the amount of potassium in the fertilizer. All three of these chemicals are important for plants, but different plants require different amounts of these chemicals, so the label helps consumers determine which product to buy.</span>
7 0
3 years ago
What is the Density of 85 mL of a liquid that has a mass of 54 Kg?
Korolek [52]

Answer:

The answer to your question is  density = 635.3 g/ml (check the units)

Explanation:

Data

density = ?

volume = 85 ml

mass = 54 kg

Density is a physical property that relates the mass of an object and its volume.

The unit of this property are g/ml or kg/m³

In this problem, I will calculate the density in g/ml

Formula

            density = mass/ volume

-Substitution

            density = 54000 / 85

-Simplification

            density = 635.3 g/ml

3 0
3 years ago
The characteristics that best describe the tail of a phospholipid molecule are _____?
Furkat [3]
<span>According to its definition, the answer is: The characteristics that best describe the tail of a phospholipid molecule are </span><span>a. neutral charge, nonpolar, and hydrophobic</span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • What is the volume of 1 mole of helium gas when the pressure is 1.47 atm and the temperature is 287k
    14·1 answer
  • The study of all chemicals containing carbon is called ?
    8·1 answer
  • All of the following chemical chanes except
    9·1 answer
  • How many moles of H2s are produced when 2.25 moles Hcl react with excess zns
    14·1 answer
  • Is Mg3(Po4) a liquid gas solid or aqueous
    10·1 answer
  • Cual es el propósito de la línea escalonada gruesa de la tabla periódica
    11·1 answer
  • 8. HELP ME PLS. I'M BEING TIMED
    10·1 answer
  • A force of 20N acts on an object. It causes a displacement of 500 cm in the direction of force. What would be the work done in N
    11·1 answer
  • Please help me and thank you and need this before Monday
    13·1 answer
  • Determine the molecular formula of a compound whose molecular mass is 60.00 g/mol and has an empirical formula of ch4n. ch4n c2h
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!