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
diamong [38]
2 years ago
7

Please help me with this homework

Chemistry
1 answer:
Shtirlitz [24]2 years ago
8 0

Answer:

Explanation:

Melting example:

Melting chocolate

Freezing example:

Freezing water to ice

Boiling example:

Water boiled in a kettle

Condensation example:

Steam from your bath/shower condenses onto the mirror

Hope this helps :)

You might be interested in
Typhoons are large storms that form over the Pacific Ocean Hurricanes are large storms that form over the Atlantic Ocean. Which
Liula [17]
D. Drop in barometric pressure, warm ocean water, humid air. The low pressure brings in a cool air mass causing collision of two different masses.

My father rode out a typhoon near Okinawa WWII, onboard the battleship USS Missouri BB-63.

Violent pitching, alarms going off for approaching capsize pitch. The captain came on loudspeaker “ don’t worry men, land is near... about a mile straight down”.
8 0
3 years ago
How would you balance this equation<br><br> HCL+ Ba &gt; BaCL2 + H2
vladimir2022 [97]
<span>2 HCl + Ba(OH)2 = BaCl2 + 2 H2O is the answer.</span>
5 0
3 years ago
Read 2 more answers
If 3.0 atm of pure HN3(g) is decomposed initially, what is the final total pressure in the reaction container? What are the part
lawyer [7]

This is an incomplete question, here is a complete question.

Hydrogen azide, HN₃, decomposes on heating by thefollowing unbalanced reaction:

HN_3(g)\rightarrow N_2(g)+H_2(g)

If 3.0 atm of pure HN₃ (g) is decomposed initially,what is the final total pressure in the reaction container? Whatare the partial pressures of nitrogen and hydrogen gas? Assume thatthe volume and temperature of the reaction container are constant.

Answer : The partial pressure of N_2 and H_2 gases are, 4.5 atm and 1.5 atm respectively.

Explanation :

The given unbalanced chemical reaction is:

HN_3(g)\rightarrow N_2(g)+H_2(g)

This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen and nitrogen atoms are not balanced on both side of the reaction.

In order to balance the chemical equation, the coefficient '2' put before the HN_3 and the coefficient '3' put before the N_2 then we get the balanced chemical equation.

The balanced chemical reaction will be,

2HN_3(g)\rightarrow 3N_2(g)+H_2(g)

As we are given:

The pressure of pure HN_3 = 3.0 atm

p_{Total}=2\times p_{HN_3}=2\times 3.0atm=6.0atm

From the reaction we conclude that:

Number of moles of N_2 = 3 mol

Number of moles of H_2 = 1 mol

Now we have to calculate the mole fraction of N_2 and H_2

\text{Mole fraction of }N_2=\frac{\text{Moles of }N_2}{\text{Moles of }N_2+\text{Moles of }H_2}=\frac{3}{3+1}=0.75

and,

\text{Mole fraction of }H_2=\frac{\text{Moles of }H_2}{\text{Moles of }N_2+\text{Moles of }H_2}=\frac{1}{3+1}=0.25

Now we have to calculate the partial pressure of N_2 and H_2

According to the Raoult's law,

p_i=X_i\times p_T

where,

p_i = partial pressure of gas

p_T = total pressure of gas  = 6.0 atm

X_i = mole fraction of gas

p_{N_2}=X_{N_2}\times p_T

p_{N_2}=0.75\times 6.0atm=4.5atm

and,

p_{H_2}=X_{H_2}\times p_T

p_{H_2}=0.25\times 6.0atm=1.5atm

Thus, the partial pressure of N_2 and H_2 gases are, 4.5 atm and 1.5 atm respectively.

8 0
3 years ago
Which best explains the relationship between evaporation and temperature?
wariber [46]
A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.
3 0
2 years ago
Read 2 more answers
How does a sample of helium at 15 °C compare to a sample of helium at 215 K?
Goshia [24]

The answer is: The helium at 15 °C has a higher average kinetic energy than the sample at 215 K.

215 K is equivalent to -58.15 °C. Temperature is directly proportional to average kinetic enegry, so 15 °C has a higher average kinetic energy than the sample at -58.15 °C or 215K.

3 0
3 years ago
Other questions:
  • Which statement is an opinion?
    8·2 answers
  • What volume of a 2.5M NaOH solution is required to prepare 2.0 liter of a 0.75M NaOHv
    9·1 answer
  • Is homogenised milk a solution, suspension or a colloid?
    7·1 answer
  • If acetic acid is the only acid that vinegar contains (ka=1.8×10−5), calculate the concentration of acetic acid in the vinegar.
    6·1 answer
  • When you compress a spring, which type of energy increase
    7·1 answer
  • A sample of an unknown gas with a mass of 8.21 g has a volume of 4.8064 L when the temperature is 200oC and the pressure is 1.81
    8·1 answer
  • Lithium (Li) and oxygen (O) are both in period 2. They both have _____.
    9·1 answer
  • A gas has a density of 0.902 g l at stp what is the molar mass of this gas
    10·1 answer
  • Dyfuzja co to jest i na czym polega
    12·1 answer
  • If liquid carbon disulfide reacts with 450 mL of oxygen to produce the gases carbon dioxide and sulfur dioxide, what volume of e
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!