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dedylja [7]
2 years ago
15

Calculate the number of moles of sulfuric acid in the total volume you used in the lab (i.e., 8.00 mL). Hint: Use the methodolog

y of Question (1) above for finding out the molarity of the concentrated sulfuric acid first from its density (1.84 g/mL) and concentration (98.0% w/w), then find the number of moles. Show full work.
Chemistry
1 answer:
insens350 [35]2 years ago
4 0

Answer:

0.147 mol

Explanation:

Step 1: Calculate the volumetric concentration (Cv)

We will use the following expression.

Cv = Cg × ρ

Cv = 98.0 g%g × 1.84 g/mL = 180 g%mL

Step 2: Calculate the molarity of sulfuric acid

We will use the following expression.

M = mass solute / molar mass solute × liters of solution

M = 180 g / 98.08 g/mol × 0.100 L = 18.4 M

Step 3: Calculate the moles of solute in 8.00 mL of solution

8.00 × 10⁻³ L × 18.4 mol/L = 0.147 mol

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Answer:

Since the alligator population decreased, this means there are less predators for the gar. Less predators for the gar mean the gar population will increase.  More gar also means more competition for the diving duck in terms of animals that eat crabs, and thus the diving duck population will also decrease.

Explanation:

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4 0
2 years ago
a sample of carbon dioxide contains 3.8 moles of oxygen atoms, how many moles of carbon dioxide are in the sample?
dedylja [7]
<h3>Answer:</h3>

1.9 moles

<h3>Explanation:</h3>

Carbon dioxide (CO₂) is a compound that is made up of carbon and oxygen elements.

It contains 2 moles of oxygen atoms and 1 mole of carbon atoms

Therefore;

We would say, 1 mole of CO₂ → 2 moles of Oxygen atoms + 1 mole of carbon atoms

Thus;

If a sample of CO₂ contains 3.8 moles of oxygen atoms we could use mole ratio to determine the moles of CO₂

Mole ratio of CO₂ to Oxygen is 1 : 2

Therefore;

Moles of CO₂ = 3.8 moles ÷ 2

                      = 1.9 moles

Hence, the moles of CO₂ present in a sample that would produce 3.8 moles of Oxygen atoms is 1.9 moles

6 0
3 years ago
Lithium is located in the first group of the periodic table. How many valence electrons does the element lithium have?
e-lub [12.9K]

Answer: 1

Explanation: Lithium has a single electron in the second principal energy level, and so we say that lithium has one valence electron.

6 0
1 year ago
The colors of transition metal complexes result from transitions in which a. vibrations of the ligands are excited to higher ene
sasho [114]

Answer:

c. electrons of the transition metal ion are excited to higher energies.

Explanation:

4 0
2 years ago
Which of the following materials would probably be used as a conductor of electric current in a computer chip?
Cerrena [4.2K]

Answer:

gold is metal which is a very good conductor for electric current and most chips are made out of it.

4 0
3 years ago
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