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iogann1982 [59]
3 years ago
14

The mass of all elements on the periodic table are based on which element?

Chemistry
2 answers:
djverab [1.8K]3 years ago
4 0

Answer:

Atomic Number    Symbol    Atomic Weight  

10                             Ne               20.179

11                             Na                 22.98977

12                          Mg                  24.30

13                          Al                 26.98154

Lisa [10]3 years ago
3 0

Answer:

The sum of the protons and neutrons

Explanation:

mass number= proton number + neutron number

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What is the final temperature of a sample of water if 12.15J of energy is added to 475g of water at an initial temperature of 20
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Answer:

The final temperature of water is <u>20.5061 °C.</u>

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Let the final temperature of water be 'x'.

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Initial temperature of water is, T=20.5\ \°C

Mass of water is, m=475\ g

Now, heat  is added to water and its temperature is increased. The temperature is increased because water absorbs all the heat.

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