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3 years ago

10

Which would you expect sound to have the greatest speed, 20liter container with 5000 molecules or the 20 liter container with 10

00 molecules

1 answer:

AnnZ [28]3 years ago

3 0

1000 because of less molecules

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Question 2 of 50

wolverine [178]

The thermal decomposition of calcium carbonate will produce 14 g of calcium oxide. The stoichiometric ratio of calcium carbonate to calcium oxide is 1:1, therefore the number of moles of calcium carbonate decomposed is equal to the number of moles of calcium oxide formed.

Further Explanation:

To solve this problem, follow the steps below:

Write the balanced chemical equation for the given reaction.
Convert the mass of calcium carbonate into moles.
Determine the number of moles of calcium oxide formed by using the stoichiometric ratio for calcium oxide and calcium carbonate based on the coefficient of the chemical equation.
Convert the number of moles of calcium oxide into mass.

Solving the given problem using the steps above:

STEP 1: The balanced chemical equation for the given reaction is:

$CaCO_{3} \rightarrow \ CaO \ + \ CO_{2}$

STEP 2: Convert the mass of calcium carbonate into moles using the molar mass of calcium carbonate.

$mol \ CaCO_{3} \ = 25 \ g \ CaCO_{3} \ (\frac{1 \ mol \ CaCO_{3}}{100.0869 \ g \ CaCO_{3}})\\ \\\boxed {mol \ CaCO_{3} \ = 0.2498 \ mol}$

STEP 3: Use the stoichiometric ratio to determine the number of moles of CaO formed.

For every mole of calcium carbonate decomposed, one more of a calcium oxide is formed. Therefore,

$mol \ CaO \ = 0.2498 \ mol$

STEP 4: Convert the moles of CaO into mass of CaO using its molar mass.

$mass \ CaO \ = 0.2498 \ mol \ CaO \ (\frac{56.0774 \ g \ CaO}{1 \ mol \ CaO})\\ \\mass \ CaO \ = 14.008 \ g$

Since there are only 2 significant figures in the given, the final answer must have the same number of significant figures.

Therefore,

$\boxed {mass \ CaO \ = 14 \ g}$

Learn More

Learn more about stoichiometry brainly.com/question/12979299
Learn more about mole conversion brainly.com/question/12972204
Learn more about limiting reactants brainly.com/question/12979491

Keywords: thermal decomposition, stoichiometry

5 0

3 years ago

How can endothermic and exothermic reactions help others (society)

AnnZ [28]

Here try this presentation, it should help :)

https://prezi.com/6ofdo3fadl9a/exothermic-and-endothermic-reactions-in-everyday-life/

4 0

3 years ago

When the equation Al(OH)₃ + H₂SO₄ ---> Al₂(SO₄)₃ + H₂O is balanced, the sum of the balancing coefficients is

denis-greek [22]

Answer:

The answer to your question is the letter D. 12

Explanation:

Unbalanced chemical reaction

Al(OH)₃ + H₂SO₄ ⇒ Al₂(SO₄)₃ + H₂O

Reactants Elements Products

1 Al 2

1 S 3

5 H 2

7 O 13

Balanced chemical reaction

2Al(OH)₃ + 3H₂SO₄ ⇒ Al₂(SO₄)₃ + 6H₂O

Reactants Elements Products

2 Al 2

3 S 3

12 H 12

18 O 18

Sum up the coefficients

Result = 2 + 3 + 1 + 6

= 12

5 0

4 years ago

Which of the following is the correct notation for an isotope with 3 protons and 5 neutrons

Ne4ueva [31]

Answer:

Hello is there a specific aliment you have in mind If so I can explain and tell you the answer.

5 0

4 years ago

Investigating a fire scene, Investigator Smith determines several places where fires started. What might this indicate about the

grigory [225]

Answer:

an accelerant was used because maybe some was spilt and therefore leaving a smell and evidence

3 0

3 years ago