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
Alik [6]
3 years ago
11

SUPPER EASY WILL GIVE BRAINLIEST NEED HELP ASAP

Chemistry
2 answers:
vfiekz [6]3 years ago
8 0

Answer:

D

Explanation:

You can tell when a chemical change occurs if a gas is produced (bubbles), an odor is produced, if there is a color change, or if the surroundings get hotter or colder.

emmainna [20.7K]3 years ago
7 0

Answer:

Your answer will be (D).

Hope this helps!

You might be interested in
What is a rechargeable battery?
aleksklad [387]

Answer:

a group of electrochemical cells that can be recharged

6 0
3 years ago
SO2________________.
Mashcka [7]

Answer:

a. Dipole-dipole bonding

Explanation:

SO2 has dipole-dipole bonding. This is because of the difference in the electronegativities  of Sulphur and oxygen. Moreover, the lone pair of electrons on S gives it bent shape with a net dipole  unlike CO2 which has a linear shape.( This why CO2 does not have any dipole moment).

So, the correct answer is a.

6 0
3 years ago
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s) + H2O (l) → Ca(OH)2 (s) In a p
dybincka [34]

Answer:

The option closest to the percentage yield is option;

d. 81.1

Explanation:

The given chemical equation of the reaction is presented as follows;

CaO (s) + H₂O (l) → Ca(OH)₂

The mass of CaO in the experiment, m = 2.00 g

The volume of water with which the CaO was reacted = Excess volume of water

Number of moles = Mass/(Molar mass)

The mass of Ca(OH)₂ recovered, actual yield = 2.14 g

The molar mass of CaO = 56.0774 g/mol

The number of moles of CaO in the reaction, n₁ = 2.00 g/(56.0774 g/mol ≈ 0.036 moles

The molar mass of Ca(OH)₂ = 74.093 g/mol

The number of moles of Ca(OH)₂ in the reaction, n₂ = 2.14 g/(74.093 g/mol) ≈ 0.029 moles

From the given chemical reaction, one mole of CaO reacts with one mole of H₂O to produce one mole of Ca(OH)₂

Therefore, 0.036 moles of CaO will produce 0.036 moles of Ca(OH)₂

Mass = Number of moles × Molar mass

The mass of 0.036 moles of Ca(OH)₂ ≈ 0.036 moles × 74.093 g/mol = 2.667348 grams

∴ The theoretical yield of Ca(OH)₂ = 2.667348 grams

Percentage \ yield = \dfrac{Actual \ yield}{Theoretical \ yield}  \times 100 \%

The percentage yield = (2.14 g)/(2.667348 grams) × 100 = 80.23%

Therefore, the option which is closest is option d. 81.1.

5 0
3 years ago
*SCIENCE*
Slav-nsk [51]

Answer: The correct answer is (D).

Explanation:

Space photography help astronomers:

  • To visualize and observe the position and appearance of celestial objects like: path of orbiting planets ,dim stars which invisible to naked eyes ,far away galaxies etc.
  • To observe any phenomena which is occurring at macro level for example: collision of steroids and meteors etc.
5 0
3 years ago
Read 2 more answers
How much corn syrup should be added to water to make 200 mL of a 10% by volume solution​
AnnyKZ [126]
....20 ml corn syrup
4 0
3 years ago
Other questions:
  • _______ is another resource often found buried with oil deposits.
    8·2 answers
  • The noble gases are inert due to the fact that A. their valence shell is empty B. their valence shell is full C. their electrons
    7·1 answer
  • 5. __NH3 + __O2 >>>>>__ NO +__ H20
    12·1 answer
  • What heat travel directly to the earth
    6·1 answer
  • How can you tell from a substance's formula if it is ionic or molecular?
    15·1 answer
  • What happens to an atom's overall charge if it loses or gains electrons?
    12·1 answer
  • Which can occur in a physical change?
    6·1 answer
  • Transpiration is the process by which ____.<br>​
    15·2 answers
  • Which of the following is NOT n intensive property?
    10·1 answer
  • K2CrO4 is added to a solution containing lead (II) and barium ions. If a precipitate is formed, what is it?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!