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
Hunter-Best [27]
3 years ago
14

What happens when water reaches its boiling point?

Chemistry
1 answer:
Luda [366]3 years ago
3 0

Answer:

khi sôi nhiệt độ của nước đạt 100oC, đến lúc này một phần nước sôi sẽ biến thành hơi nước, hơi nước sẽ đùn lên phá vỡ mặt nước và bốc hơi vào không khí, hình thành lên hiện tượng sôi của nước. Nước sôi đánh dấu mốc chuyển đổi trạng thái từ nước (thể lỏng) sang hơi nước (thể khí).

Explanation:

You might be interested in
Although light waves travel in straight lines, a laser beam can transmit signals through a transparent fiber optic cable even th
topjm [15]
Refraction is the answer





Gggggt gg for the ggv. Gv. Gc. Gv. CFC. F
7 0
3 years ago
Read 2 more answers
Consider the steps in coal gasification: C(coal) + H2O(g) → CO(g) + H2(g) ΔH°rxn = 129.7 kJ CO(g) + H2O(g) → CO2(g) + H2(g) ΔH°r
Volgvan

Answer:

The answer to your question is  ΔHrxn = 0 kJ

Explanation:

  Process

1.- Multiply Equation 1 by 2

           2C(coal) + 2H₂O   ⇒   2CO (g) + 2H₂      ΔH rxn = 259.4 kJ

2.- Sum equation 2

           CO(g)     +  H₂O    ⇒    CO₂ (g)  + H₂ (g)   ΔHrxn = -41 kJ

Result

2C + 3H₂O + CO  ⇒  2CO + 3H₂ + CO₂               ΔHrxn =  218.4 kJ

Simplification

        2C + 3H₂O  ⇒   CO + 3H₂  + CO₂    

3.- Sum equation 3

       CO(g) + 3H₂ (g)  ⇒  CH₄ (g)  +  H₂O  (g)       ΔHrxn = -218.4 kJ

Result

  2C + 3H₂O + 3H₂ + CO  ⇒   CO + 3H₂ + CO₂ + CH₄ + H₂O  

Simplification

                        2C + 2H₂O  ⇒   CO₂ + CH₄         ΔHrxn = 0 kJ

4 0
3 years ago
What is the (H+), if the pH of a solution is 3.20?
almond37 [142]

First of all, the answer has 3 places of accuracy.

The formula for pH is

pH = - log[H+]

Given: Ph = 3.20

Solution

3.20 = - log[H+]

Divide by - 1

-3.20 = log[H+]

Take the antilog of both sides

10^-3.20 = [H+]

[H+]= 6.30 * 10^-4 moles/L This is a measure of concentration.

It can also be written as 0.000630 moles/L

8 0
3 years ago
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 18.0 g of luminol to H2O creating
Bond [772]

Answer:

Part A. 1.355 mol/L

Part B. 0.100 mol

Part C. 74.0 mL

Explanation:

Part A.

The molar mass of luminol is 177.16 g/mol, so the number of moles at 18.0 g is:

n = mass/molar mass

n = 18.0/177.16

n = 0.1016 mol

The molarity is the number of moles divided by the volume (0.075 L)

C = 0.1016/0.075

C = 1.355 mol/L

Part B.

The number of moles is the molarity multiplied by the volume, so:

n = 5.00x10⁻² mol/L * 2.00 L

n = 0.100 mol

Part C.

To prepare a solution by dilution, we can use the equation

C1V1 = C2V2

Where C1 is the concentration of the initial (stock) solution, V1 is its volume necessary, C2 is the concentration of the diluted solution, and V2 is its volume.

Thus, C1 = 1.355 M, C2 = 0.05 M, V2 = 2.00 L

1.355V1 = 0.05*2

V1 = 0.074 L

V1 = 74.0 mL

6 0
3 years ago
Which substance represents a compound?(1) C(s) (3) CO(g)(2) Co(s) (4) O2(g)
Andrei [34K]
C = Carbon
CO = Carbon Monoxide
Co = Cobalt
O2 = Oxygen

So the answer is (3) CO
5 0
4 years ago
Read 2 more answers
Other questions:
  • What is the relationship between the degree of ionization and conductivity
    13·1 answer
  • I NEED AN ANSWER TO THESE QUESTIONS ASAP!! I GOT A TEST TOMORROW ON THIS!!!
    13·1 answer
  • mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. the mercury used to fill the cylinder weighs 306.0
    5·2 answers
  • A sample of methane gas collected at a pressure of 0.884 atm and a temperature of 6.00 C is found to occupy a volume of 26.5 L.
    13·1 answer
  • What is the name ? <br><br> Organic Chemsitry
    9·1 answer
  • What is the % yield if 20 grams of hydrogen is reacted with 32 grams
    11·1 answer
  • analyze imagine that a classmate draws an electron dot diagram for a helium atom with two dots. he or she tells you that these d
    12·1 answer
  • I need help with this pls help !!
    14·1 answer
  • The diagram above shows the repeating groups of atoms that make
    13·1 answer
  • What is the name of the compound shown here
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!