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3 years ago

Which value gives the number of particles in 1 mol of a substance?

Chemistry

1 answer:

IceJOKER [234]3 years ago

7 0

Answer:

Avagadro's Number, 6.02 × 10²³

Explanation:

This is because when you convert from moles to particles you multiply by Avagadro's number.

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Jane is on a merry-go-round that is moving at a constant speed. Her velocity is also constant.

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3. Complete the following table.

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3 years ago

if the percent by volume is 2% and the volume of solution is 250 mL what is the volume of solute and solution

Liula [17]

Answer:

Solute = 5 mL; solution = 250 mL

Explanation:

The formula for percent by volume is

$\text{Percent by volume} = \dfrac{\text{Volume of solute}}{\text{Volume of solution}}\times 100 \, \%$

If you have 250 mL of a solution that is 2 % v/v,

$\begin{array}{rcl}2 \, \% & = & \dfrac{\text{Volume of solute}}{\text{250 mL}}\times 100 \, \%\\\\2 \times \text{ 250 mL} & = & \text{Volume of solute} \times 100\\\text{Volume of solute} & = & \dfrac{2 \times 250\text{ mL}}{100}\\\\ & = & \textbf{5 mL}\\\end{array}$

If there is no change of volume on mixing,

Volume of solution = 250 mL

-Volume of solute = 5

Volume of solvent = 245 mL

5 0

3 years ago

I need the 3 questions !!! About Rubidium (Rb) ASAP PLEASE DUE IN LIKE 20 min

hjlf

Answer:

419kJ/mol
5,0,0,+12
That catches fire spontaneously

Explanation:

1. Topic: Chemistry

ElementFirst Ionization Energy (kJ/mol) Lithium520Sodium496Rubidium403Cesium376According to the above table, which is most likely to be the first ionization energy for potassium?

536kJ/mol

504kJ/mol

419kJ/mol

391kJ/mol

358kJ/mol

2. Topic: Chemistry, Atom

The correct set of four quantum numbers for the valence electrons of the rubidium atom (Z=37) is:

5,1,1,+12

5,0,1,+12

5,0,0,+12

5,1,0,+12

3. Rubidium and cesium are pyrophoric. Here the term pyrophoric means:

That hardly catches fire

That does not catch fire at all

That catches fire spontaneously

None of these

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3 years ago

Which value gives the number of particles in 1 mol of a substance?​

Which value gives the number of particles in 1 mol of a substance?