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sveticcg [70]
3 years ago
13

Two substances that have the same number of moles of representative particles always have: Answer the same number of atoms the s

ame masses the same weights none of the above
Chemistry
2 answers:
Nesterboy [21]3 years ago
7 0
<span>same no of atoms
b/c no. of atoms = moles * avogadro's no (6.022 X 10^23)</span>
Allushta [10]3 years ago
6 0

Answer:

the same number of atoms

Explanation:

Mole is defined as amount of substance which contains a fixed number of atoms/molecules/ions/particles and the number is known as Avagadro's number.

One mole is equal to 6.023X10²³ particles of any substance.

For example:

one mole of carbon will have 6.023X10²³ atoms of carbon and one mole of gold will have 6.023X10²³ atoms of gold

Thus the number of atoms will be the same in a given number of moles of any pure element.

Now the mass or weight could not be equal as the mass or weight will depend upon the atomic mass of element.

for example one mole of carbon will weigh 12grams

and one mole of gold will weigh 197grams

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What is the mass of 3.0 x 10^23 atoms of neon
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6 0
3 years ago
Read 2 more answers
An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d = 1.00 g/cm³), the flask and its contents weigh 489.1 g.
Viefleur [7K]

The answer is- Mass of flask = 608.04 g

Density (d) is defined as mass of substance divided by its volume. Thus, if mass and density are known, then Volume can be determined.

What is the formula of  mass in terms of density?

  • Let mass of substance be 'm' and volume be 'V'. Thus, as per the definition of density, it is expressed as-

d = \frac{m}{V}

Thus, mass can be expressed as-

m = d * V

  • Now, mass of empty flask = 241.3 g and the mass of  (flask + Water) = 489.1 g.

Thus, mass of water = 489.1\ g- 241.3\ g = 247.8\ g.

  • Thus, mass of water = 247.8 g and density of water =1.00\ g/cm^3. Its volume is calculated as-

V = \frac{247.8\ g}{1.00\ g/cm^3}=247.8\ cm^3

  • Volume of flask = 247.8 cm^3 .
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m = d * V = (1.48\ g/cm^3) * (247.8\ cm^3)= 366.74\ g

  • Hence, the mass of flask becomes =241.3\ g + 366.74\ g = 608.04\ g

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brainly.com/question/952755

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