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Gelneren [198K]
4 years ago
9

when you burn a log in the fireplace, the resulting ashes have a mass less than that of the original log. Account for the differ

ence.
Chemistry
2 answers:
Margaret [11]4 years ago
8 0
Some of the particles undergo a phase change and become a gas due to burning. An example would be CO2, which is lost in the air around/escapes into the atmosphere. Hope that helps!
jok3333 [9.3K]4 years ago
6 0

Answer:The difference is found in the CO2 and water vapour, H2O, that escape to the atmosphere during combustion.

Explanation: Burning of logs is combustion reaction and the it can generally be represented by

CxHy + O2 === CO2 + H2O + Heat

This is a non reversible reaction because some of the constituents of the original log are being given off during combustion. Hence, the change in the mass.

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Which usually has a higher temperature? A city or the areas around the city?
Marysya12 [62]
The city itself. Maybe from body heat and human activities.
6 0
3 years ago
Read 2 more answers
1. If you have 8.1 g CO₂ and 2.3 g H₂, which one is the limiting reactant. Show your work. 2. Calculate the theoretical yield of
ZanzabumX [31]

Answer:

2.95 g of CH₄

Explanation:

To start this, we determine the equation:

4H₂  + CO₂ →  CH₄  +  2H₂O

4 moles of hydrogen react to 1 mol of carbon dioxide in order to produce 1 mol of methane and 2 moles of water.

To determine the limiting reactant, we need to know the moles of each reactant.

8.1 g . 1 mol/ 44g = 0.184 moles of carbon dioxide

2.3 g . 1mol / 2g = 1.15 moles of hydrogen

4 moles of hydrogen react to 1 mol of CO₂

Then, 1.15 moles may react to (1.15 . 1) /4 = 0.2875 moles

We only have 0.184 moles of CO₂, so this is the limiting reactant. Not enough CO₂ to complete the 0.2875 moles that are needed.

Ratio is 1:1. 1 mol of CO₂ produces 1 mol of methane

Then, 0.184 moles of CO₂ will produce 0.184 moles of CH₄

We convert moles to mass: 0.184 mol . 16 g /mol = 2.95 g

7 0
3 years ago
When a protein of 50 nanometers is mixed with water the opaque result is called a(n):_____.
12345 [234]

When a protein of 50 nanometers is mixed with water, the opaque result is called a: suspension.

A suspension is a heterogeneous combination of two or extra substances. In it, the particles are suspended for the duration of the solution in bulk and can be easily viewed by means of bare eyes.

Learn more about suspension here:

brainly.com/question/17650174

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3 0
1 year ago
What is the mole ratio of D to A in the generic chemical reaction? 4A + B --> C + D​
storchak [24]
<h3>Answer:</h3>

Mole ratio of D to A is 1 : 4

<h3>Explanation:</h3>

We are given the generic chemical equation;

4A + B → C + D​

We are supposed to determine the mole ratio of D to A

What is mole ratio?

  • Mole ratio is the ratio of the number of moles of reactants or products in a chemical reaction.
  • We determine the mole ratio using the coefficients of reactants or products in question.

For example;

  • In the equation, 4A + B → C + D​, the coefficient of A is 4 while the coefficient of D is 1.
  • This means, 4 moles of A reacts with 1 mole of b to produce 1 mole of C and 1 mole of D
  • Thus, mole ratio of D to A  is 1 : 4
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3 years ago
Need help looking for the rest of the words
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What words are you looking for so i dont put them down 
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