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s344n2d4d5 [400]
3 years ago
10

Choose all the answers that apply.

Chemistry
1 answer:
Naily [24]3 years ago
3 0

All of the above

Explanation:

Science is a methodical way of investigating the world around us in order to find out the truth and facts about them. Technology is the practical aspect of science.

  • The knowledge and understanding of x-rays as part of the electromagnetic radiation made it possible to use the rays to study the internal structures of substances.
  • The discovery of radioactivity has led to the development of nuclear energy that are produced in nuclear reactors.
  • Satellites are built on the principles of science.
  • Robotic machines are based on scientific studies and electricity originated from a good knowledge of the atom.

Learn more:

radioactivity brainly.com/question/10125168

#learnwithBrainly

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Answer:

A, it is metal oxide

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3 years ago
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A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed inside the calorimeter. When equilibrium ha
Tju [1.3M]
When equilibrium has been reached so, according to this formula we can get the specific heat of the unknown metal and from it, we can define the metal as each metal has its specific heat:

Mw*Cw*ΔTw = Mm*Cm*ΔTm

when 
Mw → mass of water
Cw → specific heat of water
ΔTw → difference in temperature for water 

Mm→ mass of metal
Cw→ specific heat of the metal
ΔTm → difference in temperature for metal

by substitution:

100g * 4.18 * (40-39.8) = 8.23 g * Cm * (50-40)

∴ Cm = 83.6 / 82.3 = 1.02 J/g.°C

when the Cm of the Magnesium ∴ the unknown metal is Mg
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3 years ago
According to one acid-base theory, water can act as a base because a water molecule can
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1) donate an H+ ion

Explanation:

option 1 is correct

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2 years ago
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svetlana [45]

Answer:

D

Explanation:

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What is the organization that regulates the safety of Bluetooth and other wireless devices
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