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jok3333 [9.3K]
3 years ago
6

How is the periodic table of the elements arranged?

Chemistry
2 answers:
Bogdan [553]3 years ago
6 0

Answer:

Answer is B

Explanation:

i just took the test

vagabundo [1.1K]3 years ago
3 0

Answer:

B. By aligning groups with common properties.

Explanation:

  • The periodic table is a table of elements arranged into rows called periods and columns called groups.
  • Elements with similar chemical properties are placed in the same group. For example, group 1 elements known as alkali metals share similar properties.
  • Elements in the same period or low have the same number of energy shells or energy levels. For example elements in period 3 have 3 energy levels.
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SVETLANKA909090 [29]
The balanced equation for the reaction is
CO(g) + 2H₂(g) ⇄ CH₃<span>OH(g)

Since given concentrations are at equilibrium state, the expression for the equilibrium constant, k can be written as
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By substitution,
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3 years ago
Question 3 (1 point)
irina1246 [14]

false

Explanation:

i took the test

4 0
2 years ago
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In the laboratory you are asked to make a 0.565 m sodium bromide solution using 315 grams of water. How many grams of sodium bro
Scorpion4ik [409]

Answer : The mass of sodium bromide added should be, 18.3 grams.

Explanation :

Molality : It is defined as the number of moles of solute present in kilograms of solvent.

Formula used :

Molality=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Mass of solvent}}

Solute is, NaBr and solvent is, water.

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Molality of NaBr = 0.565 mol/kg

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Now put all the given values in the above formula, we get:

0.565mol/kg=\frac{\text{Mass of NaBr}\times 1000}{103g/mole\times 315g}

\text{Mass of NaBr}=18.3g

Thus, the mass of sodium bromide added should be, 18.3 grams.

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3 years ago
The arrows in the chart below represent phase transitions. Three bars are shown labeled Solid, Liquid, and Gas. They are connect
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<h3>Meaning of phase transitions</h3>

Phase transitions can be defined as the changing of matter from one form to another due to the addition or gaining of heat or due to the removal or loss of heat.

Phase transitions in matter are majorly between three phases which are: Solid, Liquid and Gas.

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Learn more about Phase transitions: brainly.com/question/11048831

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2 years ago
When patterns of stars appear to move across the sky, it provides evidence that ________.
Alexus [3.1K]

Answer:

Answered B

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