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BigorU [14]
3 years ago
10

What are the horizontal parts of the periodic table called

Chemistry
1 answer:
Andru [333]3 years ago
5 0
The Answer is Periods .
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Identify the following as an element or compound <br><br> copper II oxide
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Copper II oxide is a compound.
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Calculate the percentage composition of (NH4)CO3
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Explanation: In order to determine percent composition of the elements in a compound, the molar mass (MM) of each element is divided by the MM of the compound and multiplied by 100. The molar mass of ammonium carbonate ((NH4)2CO3) is 96.086 g/mol .

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A student increases the temperature of a 200 cm3 balloon from 33degrees C to 47 degrease C. What will the new volume of the ball
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The answer is 209.15cm3

The volume is directly related to the temperature of a gas. You can solve this question using Charles' law, but remember to convert the temperature from Celcius to Kelvin.

V1/T1= V2/T2
<span>200 cm3/ (33+273K)= V2/(47+273K)
V2= 200cm3 * 320/306= 209.15cm3</span>
7 0
3 years ago
Read the thesaurus entry and sentence.
tatiyna

Answer:noun

Explanation:

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The concentration of calcium in a cell is 0.3%. The concentration of calcium in the surrounding fluid is 0.1%. How could the cel
iragen [17]

Answer:

Primary active transport                                                                                              

Explanation:

In a cell, the movement of molecules like calcium ions (Ca²⁺), <em>to a region having high solute concentration from a region having low solute concentration, through the cell membrane requires metabolic energy</em> and is known as Primary active transport.

It is given that the concentration of calcium in the cell (0.3%) is greater than the concentration of calcium in the fluid surrounding the cell (0.1%). <em><u>So the calcium ions move into the cell and the cell obtains more calcium. </u></em>

<u>Therefore, the cell obtains more calcium by the process of Primary active transport.</u>

4 0
4 years ago
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