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
skelet666 [1.2K]
3 years ago
14

Which of these is NOT an example of physical change?

Chemistry
1 answer:
forsale [732]3 years ago
5 0

Answer:

D. A change of appearance

You might be interested in
One calcium atom for every two iodine atoms chemical formula
borishaifa [10]
Is it multiple choice or do you just answer
4 0
2 years ago
PLEASEEEEEEEEEEEE HELPPPPPPPP I BEGGGGG FOR HELPPPPP
Elza [17]

Answer: There are 21.08\times 10^{23} molecules in 63.00 g of H_2O

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{63.00g}{18g/mol}=3.5moles

1 mole of H_2O contains =  6.023\times 10^{23} molecules

Thus 3.5 moles of H_2O contains =  \frac{6.023\times 10^{23}}{1}\times 3.5=21.08\times 10^{23} molecules.

There are 21.08\times 10^{23} molecules in 63.00 g of H_2O

3 0
3 years ago
Given the following reaction: 2D(g) + 3E(g) + F(g) \longrightarrow⟶ 2G(g) + H(g) When the concentration of D is decreasing by 0.
Zepler [3.9K]

Answer:

Rate of reaction = -d[D] / 2dt  = -d[E]/ 3dt = -d[F]/dt  = d[G]/2dt = d[H]/dt

The concentration of H is increasing, half as fast as D decreases: 0.05 mol L–1.s–1

E decreseas 3/2 as fast as G increases = 0.30 M/s

Explanation:

Rate of reaction = -d[D] / 2dt  = -d[E]/ 3dt = -d[F]/dt  = d[G]/2dt = d[H]/dt

When the concentration of D is decreasing by 0.10 M/s, how fast is the concentration of H increasing:

Given data = d[D]/dt = 0.10 M/s

-d[D] / 2dt  = d[H]/dt

d[H]/dt = 0.05 M/s

The concentration of H is increasing, half as fast as D decreases: 0.05 mol L–1.s–1

When the concentration of G is increasing by 0.20 M/s, how fast is the concentration of E decreasing:

d[G] / 2dt  = -d[H]/3dt

E decreseas 3/2 as fast as G increases = 0.30 M/s

5 0
3 years ago
Rutherford's experiment showed that subatomic particles
Nostrana [21]
B. Don't take up most of the space in an atom,
4 0
3 years ago
Read 2 more answers
How do i fill out this ICE chart? please help
LuckyWell [14K]

Answer: You can probably go onto <em><u>You Tube and find that answer!</u></em> Just be <u><em>detailed in your search!</em></u> Hope this helps!  

Explanation:

Just Simple Physics :P          

3 0
2 years ago
Read 2 more answers
Other questions:
  • Why can polar water molecules pass through a cell membrane?
    12·1 answer
  • A majority of the 118 elements on the periodic table are classified as
    11·1 answer
  • Which substances are most likely acids
    13·2 answers
  • A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of ga
    14·2 answers
  • In alpha decay, alpha particles are ejected from the nucleus. Which equation represents alpha decay?
    9·2 answers
  • Which is an expression?<br> A. 1 = 3 - 2<br> B. 2 + 5 = 5 + 2<br> C. 4+ 3 &lt; 9<br> D. 26
    11·2 answers
  • g The following equation is given for the dissociation of the complex ion Ag(NH3) 2. The dissociation constant, Kd, is the equil
    8·1 answer
  • Discuss some of the biotic (living) and abiotic (nonliving) factors in the chimps’ ecosystem that affect their behavior.
    13·1 answer
  • What does literal mean in science please hurry it's due at 11:40!!
    12·1 answer
  • 100 points right here first come first serve. amos thejonah2016
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!