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lesya [120]
3 years ago
10

Convert 6.90 x 10-3 km to nm3

Chemistry
1 answer:
marshall27 [118]3 years ago
5 0
I’m sorry I’m really not sure how to answer this but have to respond to have this app I hope you have a good day:)
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HELP
Vesnalui [34]

Answer:

145.8g

Explanation:

Given parameters:

Number of moles of magnesium hydroxide  = 2.5mol

Unknown:

Mass of Mg(OH)₂  = ?

Solution:

To solve this problem we use the expression below;

  Mass of Mg(OH)₂ = number of moles x molar mass

 Molar mass of Mg(OH)₂ = 24.3 + 2(16 + 1)  = 58.3g/mol

 Mass of Mg(OH)₂ = 2.5 x 58.3  = 145.8g

3 0
2 years ago
Select all correct answers.
Jlenok [28]

Answer: It showed that all atoms contain electrons.

Explanation:

  • J.J. Thomson's experiments inside a cathode ray tube in the presence of an electric field showed that all atoms contain tiny negatively charged subatomic particles "electrons".
  • Also, Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup."
  • Furthermore, Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny positively-charged nucleus.
  • Then, Rutherford proposed the nuclear model of the atom based on these results.
7 0
3 years ago
Help me its due soon thanks
UkoKoshka [18]

Answer:

B

Explanation:

The gravity accelleration values are the same for both planets.

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3 years ago
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Energy levels of the Atom O
Artyom0805 [142]

Answer:

Oxygen has 2 energy levels

Explanation:

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If you wanted to perform a controlled experiment to test the effect of temperature on the pressure of a bicycle tire, which of t
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It would be the needle pressure gage temp check
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