Taking into account the definition of avogadro's number, 3.82×10⁻³ moles of H are 2.3×10²¹ particles of H.
<h3>
Avogadro's Number</h3>
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
<h3>This case</h3>
Then you can apply the following rule of three: if 6.023×10²³ particles are contained in 1 mole of H, then 2.3×10²¹ particles are contained in how many moles of H?
amount of moles of H= (2.3×10²¹ particles × 1 mole)÷ 6.023×10²³ particles
<u><em>amount of moles of H= 3.82×10⁻³ moles</em></u>
Finally, 3.82×10⁻³ moles of H are 2.3×10²¹ particles of H.
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The element that has the least is na
<h3>
Answer:</h3>
15.0 mol H₂O
<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>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>
9.03 × 10²⁴ molecules H₂O
<u>Step 2: Identify Conversions</u>
Avogadro's Number
<u>Step 3: Convert</u>
- Set up:
- Multiply/Divide:
<u>Step 4: Check</u>
<em>Follow sig figs rules and round. We are given 3 sig figs.</em>
14.995 mol H₂O ≈ 15.0 mol H₂O
The time taken for the water fountain to dispense 842.75 mL of water is 20.625 seconds
<h3 /><h3>What is time?</h3>
Time can be defined as the measure of past, present or future events.
To calculate the time taken to dispense 842.75 mL of water, we use the formula below.
Formula:
- F = V/t................ Equation 1
Where:
- F = Average flow rate of the fountain
- V = Volume of the water
- t = time.
Make t the subject of the equation.
- t = V/F................ Equation 2
From the question,
Given:
- F = 0.64 gallons per minutes
- V = 842.75 mL = (842.75/1000)/(3.78541) gal = 0.22 gal.
Substitute these values into equation 2
- t = 0.22/0.64
- t = 0.34375 minutes.
- t = (0.34375×60) = 20.625 seconds.
Hence, The time taken for the water fountain to dispense 842.75 mL of water, is 20.625 seconds.
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So, the equation NaCl is a 1:1 mol ratio, so we need to convert grams of Na to mols of Na. Then we take that mols of Na, and then since it is a 1:1 ratio, it is the same number of mols of Cl. Then, we take the mols of Cl and multiply it by the mol ratio.
The equation looks as the following:
So, 53.99260 is the answer, but rounding to sig figs, we round to 3 sig figs (since 35.0 has only 3 sig figs)
54.0g Cl