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belka [17]
3 years ago
14

The columns of the main transition element start with group.........(2B, 4B, 3B, 5B)

Chemistry
1 answer:
tia_tia [17]3 years ago
7 0
Yes :) elements in the central block. Groups 4B–8B, 1B, and 2B, or 4–12) in the periodic table, for example, iron, manganese, chromium, and copper :) hope this helps!
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A student checks the air in her bicycle tires early in the morning when it is cool outside. If she measures it again later in th
Dmitry_Shevchenko [17]

Answer:

She will observe that the pressure on the tire is higher.

Explanation:

By the ideal gas law, the pressure and the temperature are directly proportional, so, if the temperature increases the pressure increases too:

PV = nRT (P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature).

The temperature is a measure of the average kinetic energy of the gas molecules, so when the temperature increases, the energy also increases, and the gas molecules will move more quickly, so they will collide more often between themselves and in the wall. Those collisions will be with more force because the velocity is higher.

So, the pressure will be higher, because it is the result of collisions of the gas molecules with the walls of the tire.

6 0
3 years ago
Use complete sentences to differentiate between acids and bases on the basis of touch. Give an example of each type. PLEASE HELP
aleksklad [387]

Explanation:

Bases have a slippery feel when touched but acids do not have a slippery feel.

  • An acid is a substance that interacts with water to produce excess hydroxonium ions, H₃O⁺ in an aqueous solution. Here are some of its properties:
  1. Their dilute solutions have a sour taste.
  2. They have a burning effect on the skin and are highly corrosive on metals.
  3. They have the ability to change the colors of indicators.
  4. They react with bases to form salt and water only.

Examples of acids are:

                Hydrochloric acid                  HCl

                Tetraoxosulphate (VI ) acid H₂SO₄

               

  • A base is a substance that interacts with water to produce excess hydroxide ions, OH⁻ in an aqueous solution.
  1. They typically have a bitter taste.
  2. They have a soapy feel
  3. They are electrolytes
  4. They also change the color of indicators

Examples are:

                Potassium hydroxide      KOH

                Sodium hydroxide           NaOH

Learn more:

Neutralization brainly.com/question/6447527

#learnwithBrainly

5 0
4 years ago
Solid magnesium reacts with aqueous Iron(III) chloride to produce aqueous magnesium chloride and solid iron.
luda_lava [24]

Answer:

9÷2Mg2+2FeCl3 =3Mg3Cl2 +2Fe

3 0
4 years ago
What is best way to get salt out of salt water solution
Vlad1618 [11]

Answer:

The "simple" hurdle that must be overcome to turn seawater into freshwater is to remove the dissolved salt in seawater. That may seem as easy as just boiling some seawater in a pan, capturing the steam and condensing it back into water (distillation).

3 0
4 years ago
Read 2 more answers
Which of these statements about atomic models is most likely correct?
taurus [48]

Answer:

The correct option is the second option

Explanation:

Generally, the aim of science is to understand a particular concept in the best and the most correct way possible; hence experiments are done and repeated to ensure an explanation is actually true about a concept or need modification.

The atomic models have also been a "beneficiary" of this process. The different atomic models are usually been improved upon as scientists leaned more. For example, the Dalton's atomic theory has been modified to a more correct atomic description; some of which are shown below

(1) Dalton's theory suggested that an atom is the smallest unit of a molecule. We know now from different experiments (by J. J Thompson and Rutherford) that atoms are not the smallest molecules and are made up of smaller particles known as protons, neutrons and electrons.

(2) Dalton's theory suggested that atoms of the same elements are alike in all aspects. The knowledge of isotopy shows this is not always the case. As atoms of the same elements (isotopes) have the same atomic number but different mass number; hence cannot be said to be the same in all aspects.

(3) Dalton's theory also suggested that when atoms react, they do so in fixed, simple whole number ratio. The knowledge of organic chemistry shows atoms do not always react in simple whole number ratios

There are several modifications to different postulations by scientists that have also occurred aside from this, hence the most correct answer is that "As scientists learned more, they modified the atomic model"

5 0
3 years ago
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