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Sedbober [7]
3 years ago
7

In the chemical reaction below, calcium (ca) and water (h2o) react to form calcium hydroxide (ca(oh)2) and hydrogen gas (h2).ca

(s) 2h2o (l) → ca(oh)2 (aq) h2 (
g.calcium and water are the reactants in this chemical reaction, whereas calcium hydroxide and hydrogen gas are the products that are formed. once the reaction reaches completion, finish the sentence...
a. the products of the reaction will have changed back into the reactants.
b. the total mass of the products will be greater than the original mass of the reactants.
c. the total mass of the products will be equal to the original mass of the reactants.
d. the total mass of the products will be less than the original mass of the reactants.
Chemistry
1 answer:
schepotkina [342]3 years ago
7 0
I think the correct answer from the choices listed above is option C. Calcium and water are the reactants in this chemical reaction, whereas calcium hydroxide and hydrogen gas are the products that are formed. once the reaction reaches completion, the total mass of the products will be equal to the original mass of the reactants. 
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polet [3.4K]
<h3>Answer:</h3>

1 x 10^13 stadiums

<h3>Explanation:</h3>

From the question;

1 x 10^5 people can fill 1 stadium

We are given,  1 x 10^18 atoms of iron

We are required to determine the number of stadiums that  1 x 10^18 atoms of iron would occupy.

We are going to assume that a stadium would occupy a number of atoms equivalent to the number of people.

Therefore;

One stadium =  1 x 10^5 atoms

Then, to find the number of stadiums that will be occupied by  1 x 10^18 atoms;

No. of stadiums = Total number of atoms ÷ Atoms in a single stadium

                           =  1 x 10^18 atoms ÷  1 x 10^5 atoms

                          =  1 x 10^13 stadiums

Therefore,  1 x 10^18 atoms of iron would occupy  1 x 10^13 stadiums

7 0
3 years ago
The concentration of carbon monoxide (CO), a common air pollutant, is found in a room to be 5.7 x 10^-3 mg/cm^3. How many grams
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<h3>Stoichiometric problem</h3>

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We can obtain the volume of the room as:

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Thus:

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More on stoichiometric problems can be found here: brainly.com/question/14465605

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Answer:

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or choice a

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A solution of 2.9 m weak acid is 0.52 ionized. what is the ka value of this acid
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