<h3>
Answer:</h3>
1.827 × 10²⁴ molecules H₂S
<h3>
General Formulas and Concepts:</h3>
<u>Math</u>
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Chemistry</u>
<u>Compounds</u>
- Writing Compounds
- Acids/Bases
<u>Atomic Structure</u>
- Reading a Periodic Table
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<h3>
Explanation:</h3>
<u>Step 1: Define</u>
103.4 g H₂S (Sulfuric Acid)
<u>Step 2: Identify Conversions</u>
Avogadro's Number
Molar Mass of H - 1.01 g/mol
Molar Mass of S - 32.07 g/mol
Molar Mass of H₂S - 2(1.01) + 32.07 = 34.09 g/mol
<u>Step 3: Convert</u>
- Set up:
- Multiply:
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 4 sig figs.</em>
1.82656 × 10²⁴ molecules H₂S ≈ 1.827 × 10²⁴ molecules H₂S
Answer:
I would guess that a polar air mask would be freezing, high winds type weather. I think that's right.
H₂ is the limiting reactant.
<u>Explanation:</u>
H₂ reacts with O₂
The reaction would be
2H₂ + O₂ → 2H₂O
According to the balanced equation, 2 moles of H₂ reacts with 1 mole of O₂ to form 2 moles of H₂O.
The ratio of usage of H₂ and O₂ is 2 : 1 respectively
If 3 moles of H₂ and 2 moles of O₂ are present then:
3 moles of H₂ would require 1.5 moles of O₂ ( 2 : 1 of H₂ and O₂ )
Out of 2 moles of O₂, 1.5 moles would be used and 0.5 mole would be in excess.
Therefore, H₂ is the limiting reactant as the number of moles of H₂ are not enough to use all the O₂.
You can learn about the types of metals there are based on their location on the periodic table. The three categories of metals are the alkali metals, the alkaline earth metals and the transition metals.
a. 1.505 x 10²⁴
b. 4.37 x 10²⁴
c. 2.34 x 10²⁴
d. 8.127 x 10²³
<h3>Further explanation</h3>
Given
Number of moles of elements
Required
The number of particles
Solution
1 mol = 6.02 x 10²³ particles(molecules, ions, atoms)
Can be formulated :
N = n x No
No = Avogadro's number
n = mol
a. 2.5 mo Ca x 6.02 x 10²³ = 1.505 x 10²⁴
b. 7.26 mol Al x 6.02 x 10²³ = 4.37 x 10²⁴
c. 3.89 mol S x 6.02 x 10²³ = 2.34 x 10²⁴
d. 1.35 mol Pb x 6.02 x 10²³ = 8.127 x 10²³
