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Drupady [299]
3 years ago
8

How many atoms are in a 591 g sample of gold?

Chemistry
1 answer:
skelet666 [1.2K]3 years ago
3 0

Answer:

You use the fact that 1 mole of any substance contains exactly 6.022⋅1023 atoms or molecules of that substance - this is known as Avogadro's number. In your case, 1 mole of gold will have exactly 6.022⋅1023 atoms of gold.

So it would be answer 3690 atoms or 3.60x1025

Explanation:

You might be interested in
22. A piece of wood board contains approximately 6.76 X 1023 molecules of wood, C2H4920, how
Licemer1 [7]

Answer:

<h2>1.23 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{6.76 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{6.76}{6.02}  \\  = 1.22923...

We have the final answer as

<h3>1.23 moles</h3>

Hope this helps you

5 0
3 years ago
4. Which class of matter is the least evenly
lys-0071 [83]

Answer:

Pure iron sulfide is homogeneous (uniform in appearance and properties), shows constant composition (a consistent ratio of iron to sulfur throughout any sample of it, large or small), consists of molecules all of one type, is no longer separable into two separate substances without another chemical reaction, and is .

Explanation:

Mixtures in two or more phases are heterogeneous mixtures. ... The exception would be solutions that contain another phase of matter. For example, you can make a homogeneous solution of sugar and water, but if there are crystals in the solution, it becomes a heterogeneous mixture.

8 0
3 years ago
Can y’all help me with this question
Hoochie [10]

Answer:

owa owa

Explanation:

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4 0
3 years ago
If you wanted to neutralize 4.00g NaOH, what volume (l) of 1.0 M HCl would you need?
zhannawk [14.2K]
The balanced reaction between NaOH and HCl is as follows
NaOH + HCl ----> NaCl + H₂O
stoichiometry of NaOH to HCl is 1:1
molar mass of NaOH is 40 g/mol 
number of moles = \frac{mass present }{molar mass}
therefore number of NaOH moles - 4.00 g / 40 g/mol = 0.100 mol
since molar ratio of HCl to NaOH is 1:1
number of HCl moles required = 0.100 mol
Molarity of HCl is 1.0 M
this means that a volume of 1 L contains 1.0 mol
therefore volume containing 0.100 mol - 0.100 mol / 1.0 mol/L = 0.10 L
volume of HCl required = 100 mL 
5 0
3 years ago
What is the relationship between an atom's atomic mass and one mole of that atom?
Lelu [443]
The atomic mass is measured in "atomic mass units" (amu). One mole of an element weighs the same atomic mass number, but in grams. 
For example, carbon, C, has an atomic mass of 12.011 amu. One mole of carbon has a mass of 12.011 grams. 
6 0
3 years ago
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