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Akimi4 [234]
3 years ago
15

3.25*10^25 atoms of neon gas equals how many moles of neon gas?

Chemistry
2 answers:
gayaneshka [121]3 years ago
8 0

Answer:

53.97 moles

Explanation:

First off, it is important to understand the following concepts;

Avogadro's number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale.

Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022 * 10^{23} mol-1 and is expressed as the symbol NA.

Hence, the relationship between number of moles and number of atoms is given as;

1 mole = 6.022 * 10^{23} atoms

The question asks to find the number of moles 3.25 * 10^{25} atoms equals to.

so we have;

1 = 6.022 * 10^{23}

x = 3.25 * 10^{25}

upon cross multiplication, we are left with;

x = (1 * 3.25 * 10^{25} ) / 6.022 * 10^{23}

x = 53.97 moles

charle [14.2K]3 years ago
3 0
Mole<span>: the amount of a substance that contains 6.02 x </span>10<span>. 23 respective particles of that substance. Avogadro's number: 6.02 x </span>10<span>. 23. Molar Mass: the mass of one </span>mole<span> of an element. CONVERSION FACTORS: 1 </span>mole<span> = 6.02 x </span>10<span>. 23 </span>atoms<span> 1 </span>mole<span> = </span>atomic<span> mass (g). Try: 1. How </span>many atoms<span> are in 6.5</span>moles<span> of zinc</span>
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Akosua has observed that anytime she drinks sobolo, her stool appears dark green. On one occasion
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Answer:

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The pH at the rectum of the digestive system = 5 to 8 (Slightly basic)

Therefore, what made the stool of Akosua green is that the sobolo drink changes to green in basic solution

ii. The stool which appeared green because she took sobolo turn into bright red upon mixing with the acidic WC water because of the presence of anthocyanins in sobolo, it turns red in an acidic medium

iii. Sobolo which turns green, or blue in a basic medium and red in an acidic medium can be used as a litmus solution to test the pH of a given substance

Explanation:

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8 0
3 years ago
Many grams of aluminum are required to produce 3.5 moles Al2O3 in the presence of excess O2?
Aleks [24]
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write  the  equation for reaction
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4 0
2 years ago
A student places a small amount of water in a glass dish and then carefully places a small paperclip on the surface of the water
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Include: 
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3 0
3 years ago
Read 2 more answers
A Silty Clay (CL) sample was extruded from a 6-inch long tube with a diameter of 2.83 inches and weighed 1.71 lbs. (a) Calculate
inna [77]

Answer:

a) the wet density of the CL sample is 0.0453 lb/in³

b) the water content in the sample is 65.37%

c) the dry density of the CL sample is 0.0274 lb/in³

Explanation:

Given that;

diameter d = 2.83 in

length L = 6 in

weight m = 1.71 lbs

A piece of clay sample had wet-weight of 140.9 grams  and dry-weight of 85.2 grams

a) wet density of the CL sample

wet density can be expressed as  p = M /v

V is volume of sample which is; π/4×d²×L

so p = M / π/4×d²×L

we substitute

p = 1.71 / (π/4 × (2.83)²× 6

p = 1.71 / 37.741

p = 0.0453 lbs/in³

so the wet density of the CL sample is 0.0453 lb/in³

b)

water content of sample is taken as;

w =  (wet_weight - dry_weight) / dry_weight

we substitute

w = (140.9 - 85.2) / 85.2

w = 55.7 / 85.2

w = 0.6537 = 65.37%

therefore the water content in the sample is 65.37%

c)

dry density of the CL sample

to determine the dry density, we say;

Sd = p / ( 1 + w )

we substitute

Sd = 0.0453 / ( 1 + 0.6537)

Sd = 0.0453 /  1.6537

Sd = 0.0274 lb/in³

therefore the dry density of the CL sample is 0.0274 lb/in³

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