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bija089 [108]
3 years ago
7

TRUE FALSE? The MOLE is a unit in Chemistry that serves as a bridge between the ATOMIC and MACROSCOPIC worlds?​

Chemistry
2 answers:
Vanyuwa [196]3 years ago
7 0

Answer:

True

Explanation:

A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

BlackZzzverrR [31]3 years ago
7 0
Trueeeeeeeee!!!!!!!!!!!!
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Balanced symbol equation for reaction between sodium carbonate solution and dilute sulphuric acid?
Dmitry [639]

Answer:

The molecular equation for the reaction betweensodium carbonate and sulfuric acid is: 1. Na2CO3(aq)+H2SO4(aq)→Na2SO4(aq)+CO2(g)+H2O(l) N a 2 C O 3 ( a q ) + H 2 S O 4 ( a q ) → N a 2 S O 4 ( a q ) + C O 2 ( g ) + H 2 O ( l ) .

Explanation:

3 0
2 years ago
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A metal cylinder has a mass of 128g. When the cylinder is submerged into water, it displaces 424ml of water. Calculate the speci
Colt1911 [192]
First, we will need to find the density of the object, take the mass and divide it by the dispplaced water:
128/424 = 0.302 grams/milliliters 
Convert that to kg/m3
We get: 302kg/m3
Divide that to the density of water: 1000kg/m3
302/1000 = 0.302 
(thats a pretty darn light weighted metal)

7 0
3 years ago
Calculate the molarity of solution of "sodium sulfate" that contains 5.2 grams sodiums sulfate diluted to 500mL
wlad13 [49]

Taking into account the definition of molarity, the molarity of solution of sodium sulfate is 0.0732 \frac{moles}{liter}.

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

Molarity=\frac{number of moles}{volume}

Molarity is expressed in units \frac{moles}{liter}.

<h3>Molarity of solution of sodium sulfate.</h3>

In this case, you have:

  • number of moles of sodium sulfate= 5.2 grams\frac{1 mole}{142 grams} = 0.0366 moles (being 142 g/mole the molar mass of sodiums sulfate)
  • volume= 500 mL= 0.5 L (being 1000 mL= 1 L)

Replacing in the definition of molarity:

Molarity=\frac{0.0366 moles}{0.5 L}

Solving:

Molarity= 0.0732 \frac{moles}{liter}

Finally, the molarity of solution of sodium sulfate is 0.0732 \frac{moles}{liter}.

Learn more about molarity:

brainly.com/question/9324116

brainly.com/question/10608366

brainly.com/question/7429224

3 0
1 year ago
Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49x10 to the 14 th power Hz
Nuetrik [128]
For this problem, we have to use the Planck's equation.

E = hv
where
E is the energy
h is Planck's constant equal to 6.626×10⁻³⁴ J·<span>s
v is the frequency in Hz or s</span>⁻¹<span>

Applying the equation, the answer would be:

E = (</span>6.626×10⁻³⁴ J·s)(5.49×10¹⁴ s⁻¹)
<em>E = 3.64×10⁻¹⁹ J</em>
4 0
2 years ago
Of the metals pb, mg, au, and na, which will not spontaneously donate electrons to copper in solution?
Schach [20]
Au :)

Pb + Cu(2+)---> Pb(2+) + Cu
Mg + Cu(2+)---> Mg(2+) + Cu
2Na + Cu(2+) ---> 2Na(+) + Cu

Au + Cu(2+) ---> (this reaction is not possible)
7 0
3 years ago
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