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
Marat540 [252]
3 years ago
6

Which of these is an example of a physical change ?

Chemistry
1 answer:
Gre4nikov [31]3 years ago
8 0
It's 1. Melting a substance. The rest are chemical changes
You might be interested in
Based on the reaction, identify the product.
amid [387]
The answer is Be ..:;
7 0
3 years ago
Read 2 more answers
Which type of precipitation occurs when the water vapor in a cloud freezes to form ice crystals?
Verizon [17]

Answer:snow i think

Explanation:

6 0
3 years ago
Read 2 more answers
On the periodic table, periods are elements with similar
Vladimir [108]

Answer:

B.) Atomic Properties

can I have brainliest?

Have\\a\\nice\\day

<h2 />

3 0
2 years ago
1. What amount of ammonia (in moles) is produced by the reaction of 4.00 mol H2 with 3.00 mol Nz?
ArbitrLikvidat [17]
<h2>Answer:  6 moles</h2>

<h3>Explanation:</h3>

3 H₂    +    N₂   →   2 NH₃

   ↓            ↓

4 mol       3 mol

Since the moles of N₂ is the smaller of the two reactants, then N₂ is the limiting factor (the reactant that will decide how much ammonia is produced since it has the smaller amount of moles). ∴ we have to use it in calculating the number of moles of ammonia

The mole ratio of N₂ to NH₃ based on the balanced equation is 1 to 2.

∴ the moles of NH₃ = moles of N₂ × 2

                                =  3 moles × 2

                                = 6 moles

7 0
3 years ago
In a mixture of 2 ideal gases, A and B, PA = 0.2PB, what is the mole fraction of A?
Alborosie

Answer:

0.1667

Explanation:

Hello,

Dalton's law defines:

y_i=\frac{P_i}{P_T}

A total pressure is:

P_T=P_A+P_B

So, for A (solving for P_A in the previous equation, we get:

y_A=\frac{P_A}{P_A+P_B}

Since P_A=0.2P_B, we obtain:

y_A=\frac{P_A}{P_A+P_A/0.2}\\y_A=\frac{1}{6}\\y_A=0.1667}

Best regards.

7 0
3 years ago
Other questions:
  • What are two ways that compounds are different from the elements that form them?
    12·1 answer
  • Explain why gasoline will not dissolve in water.
    12·2 answers
  • A mothball, composed of naphthalene (c10h8), has a mass of 1.64 g . part a how many naphthalene molecules does it contain?
    9·1 answer
  • _______ is the current condition in the troposphere. (2 points)
    14·1 answer
  • Is temperature a physical property of matter
    5·2 answers
  • A color change happens during an experiment mixing two liquids. Is this a physical change or chemical change?
    5·1 answer
  • 2.56 g of hydrogen reacts completely with 20.32 g of oxygen<br> to form X g of water. X = g
    7·2 answers
  • Consider the chemical equations shown here.
    8·1 answer
  • Explain how to count the number of elements in a compound.
    9·1 answer
  • What kinds of things could a magnet make another object or magnet do without touching it?​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!