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Bumek [7]
3 years ago
15

True or False: Similar to collision theory, atoms "collide" and react to form heavier and different elements.?!?!?

Chemistry
1 answer:
oksano4ka [1.4K]3 years ago
6 0

Answer:true

Explanation:

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PLEASE HELP QUICK ITS DUE IN 5 MINUTES
inysia [295]

Answer:

The periodic table shows all the molecules that exist

Explanation:

4 0
3 years ago
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:

  1. Write the balanced chemical equation for the given reaction.
  2. Convert the mass of calcium carbonate into moles.
  3. 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.
  4. 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

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

Keywords: thermal decomposition, stoichiometry

5 0
3 years ago
Alan runs at a speed of 250 m/min. how far does he run for in 5 minutes
Tasya [4]

Answer:

Alan runs 1250 m/min in five minutes

Explanation:

250 x 5

6 0
4 years ago
When dynamic equilibrium is achieved, the rate of the forward and backward reactions go to zero. (T&F)
ratelena [41]

Answer:

1) False

2) there are equal amounts of rectants and products

Explanation:

1)  When dynamic equilibrium is achieved. the rate of forward and backward reaction they are the same, that is to say, two opposite reactions occur at the same rate, keeping the concentrations constant over time.  Different to say the rate of the ractions go to zero.

2)  A chemical equilibium exists when what is produce in quantities is equal to what reacts.

So the correct answer is the literal (d).

5 0
3 years ago
Please help!
Misha Larkins [42]
Your answer is D, OH-! correct me if I’m wrong.
4 0
3 years ago
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