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amid [387]
3 years ago
10

Investigate: Press Reset. Start with 2.000 moles of sulfur, then press Start. How many atoms do you think this amount represents

Chemistry
1 answer:
Scilla [17]3 years ago
6 0

Answer:

1.204428 * 10^24 atoms

Explanation:

Number of moles = 2 mol

Number of atoms = ?

The relationship between moles and atoms is given by the avogadro's umber. This is the number of units in one mole of a substance.  The units can be atoms, ions etc In this case it is atoms. The number is equal to  6.02214076 * 10^23

This means;

1 mol = 6.02214076 * 10^23

2 mol = x

Upon solving for x,

x = 2 * 6.02214076 * 10^23

x = 12.04428 * 10^23

x = 1.204428 * 10^24 atoms

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Jules Verne wrote the book Twenty Thousand Leagues Under the Sea. If one league - 5.556 km and one furlong - 660.0 feet, how man
Vlad [161]

Answer:

The Nautilus travel 5.52\times 10^5 furlongs.

Explanation:

Given: 1 league = 5.556 km

1 furlong = 660.0 feet

To find: 20,000 leagues = ? furlongs

Solution:

20,000 leagues = 20,000\times 5.556 km =111,120 km

1 km = 3280.84 feet

111,120 km= 111,120\times 3280.84 feet=364,566,940.8 feet

If ,1 furlong = 660.0 feet.

Then, 1 foot = \frac{1}{660.0} furlong

364,566,940.8 feet=364,566,940.8 \times \frac{1}{660.0}

=552,374.1524 furlongs\approx 5.52\times 10^5 furlongs

7 0
3 years ago
Water molecules form hydrogen bonds to help in the process of water transport. Which property of water is described?
AlekseyPX
The property of water which is described in the lines above is <u>cohesion.
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7 0
3 years ago
Which has the greater mass 10.0 g or 1000 mg
Natalka [10]
It may be 10.0 grams
5 0
3 years ago
Is helium a metal, non metal or metalloid?
ioda

Helium is a nonmetal. There are several reasons for this, it is unable to donate electrons and It has an extremely low melting point.

4 0
4 years ago
As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the po
Ganezh [65]

Answer:

pH = 2.03

Explanation:

The pH can be calculated using the following equation:

pH = -log [H_{3}O^{+}]  (1)

The concentration of H₃O⁺ is calculated using the dissociation constant of the next reaction:

CH₃COOH + H₂O ⇄  CH₃COO⁻ + H₃O⁺    

   1.00 M    

K_{a} = \frac{[CH_{3}COO^{-}][H_{3}O^{+}]}{[CH_{3}COOH]}

Solving the above equation for H₃O⁺, we have:    

[H_{3}O^{+}] = \frac{Ka*[CH_{3}COOH]}{[CH_{3}COO^{-}]}    (2)    

The dissociation constant is equal to:    

pKa = -log(Ka) \rightarrow Ka = 10^{-pKa} = 10^{-4.76} = 1.74 \cdot 10^{-5}    

Now, by solving the equation of the solubility product for Herbigon, we can find [CH₃COO⁻]:

CH₃COOX  ⇄  CH₃COO⁻ +  X⁺  

                                             5.00x10⁻³ M

K_{sp} = [CH_{3}COO^{-}][X^{+}]

[CH_{3}COO^{-}] = \frac{K_{sp}}{[X^{+}]} = \frac{9.40 \cdot 10^{-6}}{5.00 \cdot 10^{-3}} = 1.88 \cdot 10^{-3} M

By entering the values of [CH₃COO⁻] and Ka, into equation (2) we can calculate [H₃O⁺]:

[H_{3}O^{+}] = \frac{1.74 \cdot 10^{-5}*[1.00]}{[1.88 \cdot 10^{-3}]} = 9.26 \cdot 10^{-3} M

Hence, the pH is:

pH = -log [H_{3}O^{+}] = -log [9.26 \cdot 10^{-3}] = 2.03

Therefore, the pH must be 2.03 to yield a solution in which the concentration of X⁺ is 5.00x10⁻³M.

I hope it helps you!  

6 0
4 years ago
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