To improve the efficiency of fireplaces, technologies such as A. addition of catalytic combustors and B. <span>addition of boilers are used in so far. Addition of catalytic combustors hastens the process and makes use of inerts that cannot be used. The addition of boilers also adds to the efficiency by converting fluids to higher temperatures,</span>
Answer:
- <u>7.04 × 10²⁴ molecules of Na₂O</u>
Explanation:
<u>1) Balanced chemical equation (given):</u>
- 4 Na(s) + O₂ (g) → 2Na₂O (s)
<u>2) Mole ratio:</u>
<u>3) Number of moles of O₂ in 187 grams of oxygen:</u>
- Molar mass O₂ = 32.00 g/mol
- Number of moles = mass in grams / molar mass = 187 g / 32.00 g/mol = 5.844 mol
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<u>4) Number of moles of Na₂O:</u>
- Proportion: 1 mol O₂ / 2 mol Na₂O = 5.844 mol O₂ / x
- x = 5.844 mol O₂ (2 mol Na₂O / 1 mol O₂) = 11.688 mol Na₂O
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<u>5) Number of molecules</u>
- Number of molecules = number of moles × Avogadro's number
- Number of molecules = 11.688 mol × 6.022 × 10²³ molecules/mol =
= 7.04 × 10 ²⁴ molecules ← answer
The answer is rounded to three significant figures.
Answer:
1.33L of gas
Explanation:
1 mole of Baking soda (NaHCO₃) reacts with acetic acid producing 1 mole of CO₂, water and sodium acetate, thus:
NaHCO₃ + CH₃COOH → NaCH₃COO + H₂O + CO₂
5g of NaHCO₃ (Molar mass: 84g/mol) are:
5g × (1mol / 84g) = 0.0595 moles of NaHCO₃ that produce 0.0595 moles of CO₂ -Moles of gas-.
If 1 mole of gas occupies 22.4L, 0.0595 moles occupy:
0.0595 moles gas × (22.4L / mol) = <em>1.33L of gas</em>
Answer:
type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. ... The atom that loses the electrons becomes a positively charged ion (cation), while the one that gains them becomes a
Explanation:
First, to convert from C to K, add (C+273)=k
So -25+273=248
