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xxMikexx [17]
3 years ago
15

Please help me there is 19 questions

Chemistry
1 answer:
cupoosta [38]3 years ago
6 0

Answer:

1. Hubble

2.Aristarchus

3.Galileo

4.Aristotle

5.Kepler

6.Jupiter

7.Mercury

8.Uranus

9.Venus

10.Earth

11. Jupiter and Mars

12. sun

13.D

14. Saturn

15.Gas giants

16.Kuiper Belt and Ceres,Pluto,eris and haumea.

17.pluto

18.Ptolemy's model

19.meteor- a small body of matter from the outer surface that enters the earth's atmosphere.

meteoroid- a small body moving in the solar system that would become a meteor if it enters the earth's atmosphere.

meteorite- a piece of rock or metal that has fallen to the earth's surface from outer space as a meteor.

the relationship is the diagram I drew at the top.

hope this was helpful

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If you burn 55.6 g of hydrogen and produce 497 g of water, how much oxygen reacted?
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Answer:

441.28 g Oxygen

Explanation:

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Mass of hydrogen = 55.6 g

Number of moles of hydrogen

Moles = Mass/Molar mass

          = 55.6 g ÷ 2.016 g/mol

          = 27.8 moles

The mole ratio of Hydrogen to Oxygen is 2:1

Therefore;

Number of moles of oxygen = 27.5794 moles ÷ 2

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Mass of oxygen gas will therefore be;

Mass = Number of moles × Molar mass

Molar mass of oxygen gas is 32 g/mol

Mass = 13.790 moles × 32 g/mol

<h3>          = 441.28 g</h3><h3>Alternatively:</h3>

Mass of hydrogen + mass of oxygen = Mass of water

Therefore;

Mass of oxygen = Mass of water - mass of hydrogen

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<h3>                           = 441.4 g </h3>
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