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kobusy [5.1K]
2 years ago
11

Magnesium oxide (MgO) is a compound found in antacids, that treats heartburn and indigestion. How many atoms are in 12.34 moles

of magnesium oxide?
*Please try to show work - I'm confused on this one!*
Chemistry
1 answer:
Alborosie2 years ago
4 0

Explanation:

number of particles or atom = number of moles × Avogadro's number

number of atoms = 12.34 × 6.02 × 10^23

= 7.43 × 10^24 atoms

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3 years ago
Calculate the number of moles of carbon dioxide formed when 40.0 moles of oxygen is consumed in the burning of propane. Note the
joja [24]
The first step is to balance the equation:


<span>C3H8 + 5O2 ---> 3CO2 + 4H2O


Check the balance


element          left side        right side

C                    3                  3  
H                    8                  4*2 = 8
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Then you have the molar ratios:


3 mol C3H8 : 5 mol O2 : 3 mol CO2 : 4 mol H2O


Now you have 40 moles of O2 so you make the proportion:

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Answer: option D. 24.0 mol CO2
</span>
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Answer:

\boxed {\tt Takes \ many \ years \ to \ replenish}

Explanation:

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For example, <u>fossil fuel </u>is formed from fossils after millions of years of heat and pressure turn them into fuel. Since they take many years to create, they are a <em>nonrenewable energy source.</em>

3 0
3 years ago
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