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NeTakaya
3 years ago
10

Sulfur has 4 isotopes listed below. Using a periodic table, which isotope is most likely to be the most common isotope? A) sulfu

r-32 B) sulfur-33 Eliminate C) sulfur-34 D) sulfur-35
Chemistry
1 answer:
Sav [38]3 years ago
4 0

Answer:

A) sulfur - 32

Explanation:

In periodic table you can see that S has average atomic mass = 32.06

It is closest to 32, that means that most of the atoms are isotopes sulfur-32.

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True or false only ocean waves have troughs and crest
givi [52]

false, many different forms of waves have a trough and crest.

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How does the scientific process generally begin
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It begins by trying to solve a problem and or making a hypothesis.
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One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silv
ella [17]

Answer:

3.8x10⁻⁵ M

Explanation:

By the reaction given, the stoichiometry between FeCl3 and AgNO3 and AgCl is 1:3:3. The molar mass of AgCl is 143.32 g/mol, so the number of moles that was formed is:

n = mass/molar mass

n = 0.0036g/143.32g/mol

n = 2.51x10⁻⁵ mol

Thus, the number of moles of FeCl3 that had precipitated was:

1 mol of FeCl3 ------------ 3 moles of AgCl

x -------------2.51x10⁻⁵ mol

By a simple direct three rule:

x = 8.37x10⁻⁶ mol

The precipitation is a reversible reaction, and, for the AgCl, is has an equilibrium constant Kps = 1.8x10⁻¹⁰, then, the solubility, S, (the maximum concentration of the ions that will not precipitate) can be calculated:

S² = Kps

S = √1.8x10⁻¹⁰

S = 1.34x10⁻⁵ mol/L

The volume of the sample was 250 mL = 0.250 L, so the number of moles of Cl⁻ that was not precipitated is:

n = 1.34x10⁻⁵ mol/L*0.250 L

n = 3.35x10⁻⁶ mol

Because of the stoichiometry:

1 mol of FeCl3 ------ 3 moles of Cl-

y ------ 3.35x10⁻⁶ mol

By a simple direct three rule:

y = 1.12x10⁻⁶ mol of FeCl3

The total number of moles of FeCl3 is then:

n = x + y

n = 9.5x10⁻⁵ mol

The concentration is the number of moles dived by the volume:

9.5x10⁻⁵ /0.250 = 3.8x10⁻⁵ M

7 0
3 years ago
Write the nuclear decay equation for the alpha particle decay of Pu-243
Mkey [24]

Answer:

Explanation:

The reaction can be represented by this nuclear equation: 23892U → 23490Th + 42He + Energy.

7 0
3 years ago
Vinegar is a dilute solution ethanoic acid in water (see the question above for the structure of ethanoic acid). In order to tes
Dovator [93]

Answer:

Explanation:

Below is the equation of the chemical reaction:

CH3COOH (aq) + NaOH (aq) ----------> CH3COONa (aq) + H2O (l)

The mole ratio of acid and base in the balanced equation is:

Ma = 1, Mb = 1

Cb = 0.1001 mole/Kg

Ca = ???

Va = 10 grams

Vb = 131.44 - 48.11 = 83.33 grams

From the acid-base mole ration formula

\frac{Ma}{Mb} = \frac{Ca x Va }{Cb * Vb}

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Ca = \frac{0.1001 x 83.33}{10.00} = 0.8341333 mole/kg

The number of moles of acetic acid in the sample = 0.8341333  * \frac{10}{1000}  = 0.008341333 moles

Therefore 0.008341333 moles of acetic acid are in the sample.

8 0
3 years ago
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