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sveticcg [70]
2 years ago
14

Classify the following reaction:

Chemistry
2 answers:
suter [353]2 years ago
6 0

Answer:

D) I think is single displacement (replacement)

Flura [38]2 years ago
6 0

Answer:

Combination

Explanation:

When two or more reactants combine together to form a single product that reaction is called combustion.

Here CaO and H_2O are combining to form Ca(OH)_2

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How much heat is required to raise the temperature of 81.0 g of water from its melting point to its boiling point?
Dovator [93]

Answer:

Specific heat of water = 33.89 KJ

Explanation:

Given:

mass of water = 81 gram

Initial temperature = 0°C

Final temperature = 100°C

Specific heat of water = 4.184

Find:

Required heat Q

Computation:

Q = Mass x Specific heat of water x (Final temperature - Initial temperature)

Q = (81)(4.184)(100-0)

Q = 33,890.4

Specific heat of water = 33.89 KJ

6 0
3 years ago
What are the balanced chemical equations for Hydrochloric acid and potassium hydroxide?
-Dominant- [34]
HCl(aq) + KOH(s) --> KCl(aq) + H2O(l)
7 0
3 years ago
Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group.
boyakko [2]

Answer:

Explanation:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

As the size of atom increases the ionization energy from top to bottom also  decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.  

On left side of periodic table atoms of metals are more reactive by loosing the electrons or we can say metals are more reactive by loosing the electrons so their reactivity increase down the group because of easily  removal of electrons.

On right side of periodic table atoms of nonmetals are more reactive by gaining the electrons. As we move down the group nuclear attraction becomes smaller because of shielding thus electron are less attracted by nucleus and reactivity decreases.

7 0
3 years ago
Water vapor changing to liquid water
kiruha [24]

Explanation:

When water vapour changes to liquid water then this process is known as condensation.

For example, when lid is placed in a hot water filled pan then after sometime vapours appear on the surface of lid. When temperature of water decreases then water vapours convert into liquid form.

Thus, we can conclude that in condensation water vapor changes to liquid water.

4 0
3 years ago
Read 2 more answers
Jeff has night vision goggles and can see people and animals even if it is pitch black outside. What type of electromagnetic wav
forsale [732]

Infrared radiation

Explanation:

The type of electromagnetic waves Jeff uses to make his goggles work are the infrared radiations.

Jeff is certainly using a night vision goggle to see in the dark . It senses infrared radiations

  • Infrared radiations are part of the electromagnetic spectrum.
  • Every hot objects gives off infrared radiations.
  • These googles have thermal imaging sensors that detects these radiations.
  • Naked eyes cannot see the radiations.
  • The heat emitted is a form of radiation called the infrared radiation.

learn more:

Electromagetic radiation brainly.com/question/6818046

#learnwithBrainly

7 0
3 years ago
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