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Natalka [10]
2 years ago
13

.

Chemistry
1 answer:
Alex17521 [72]2 years ago
5 0

Answer: Iron

Explanation: There are little minnerals that make it magnetic.

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Jack created a table that compares the characteristics of the sun and the moon. Which of the following corrects the mistakes in
weeeeeb [17]

Answer:

D) The sun is a burning ball of gas, and the moon revolves around a planet.

Explanation:

Unlike what Jack has written in his table, the sun is comprised of 92% gas and has no definable rocky layer or even dust. The moon revolves specifically around the Earth.

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How are problems with global warming connected to problems with air pollution?
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Changes in climate can result in impacts to local air quality. Atmospheric warming associated with climate change has the potential to increase ground-level ozone in many regions, which may present challenges for compliance with the ozone standards in the future.

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___ is Thermal energy that flows between objects due to a difference in tempture
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___ is Thermal energy that flows between objects due to a difference in tempture

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2 years ago
How many grams of SnO2 are required to produce 1.20x10^21 molecules of water?
Drupady [299]

Answer:

  • <u>0.150 grams</u>

<u></u>

Explanation:

The balanced chemical reaction to obtain water from SnO₂ is:

  • SnO₂ + 2H₂ → Sn + 2H₂O

The mole ratio is:

          \dfrac{1molSnO_2}{2molH_2O}

Find the number of moles equivalent to  1.20× 10²¹ molecules of water, using Avogadro's number:

         1.20\times 10^{21}molecules\times \dfrac{1mol}{6.022\times 10^{23}molecules}=1.9927\times 10^{-3}moles

From the mole ratio, the number of moles of SnO₂ are half the number of moles of water. That is:

  • 0.0019927 moles / 2 = 0.00099635 moles of SnO₂

Use the molar mass of SnO₂ to convert the number of moles to grams:

  • molar mass of SnO₂ = 150.71g/mol
  • mass of SnO₂ = 0.00099635mol × 150.71 g/mol = 0.150 grams.

The answer must be reported with 3 significant figures.

8 0
3 years ago
with a suitable reaction equation, show the liberation of hydrogen gas in a reaction between silver metal and hydrochloric acid​
Ahat [919]

Answer:

Silver reacts with hydrochloric acid to liberate hydrogen gas.

Explanation:

      2Ag+2HCl=2AgCl+H2

In this reaction silver and hydrochloric acid are the reactants.They undergo chemical reaction to form a precipitate of silver chloride(AgCl) along with the liberation of hydrogen gas(H2).

3 0
3 years ago
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