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N76 [4]
3 years ago
8

What is carbon -12 scale​

Chemistry
1 answer:
Contact [7]3 years ago
3 0
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Featured snippet from the web
In the Scale of Carbon brings carbon dioxide emissions out of the abstract by physically representing the volume of various architectural materials that can be produced for one tonne of CO2 emissions.
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What is one important step to complete before starting a laboratory experiment?
Nimfa-mama [501]

Answer:

Ask the teacher

Explanation:

Ask if you have to clean up or if you are not prepared for an experiment

3 0
3 years ago
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What is Catenation in chemistry?​
Eddi Din [679]

Answer:

In chemistry, catenation is the bonding of atoms of the same element into a series, called a chain. A chain or a ring shape may be open if its ends are not bonded to each other, or closed if they are bonded in a ring

Explanation:

5 0
3 years ago
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A solution is prepared by mixing 25.0 g H2O and 25.0 g C2H5OH. Determine the mole fractions of each substance.
Veronika [31]

Answer:

Mole fraction H₂O → 0.72

Mole fraction C₂H₅OH → 0.28

Explanation:

By the mass of the two elements in the solution, we determine the moles of each:

25 g . 1 mol/ 18g = 1.39 moles of water (solute)

25 g . 1 mol / 46 g = 0.543 moles of ethanol (solvent)

Mole fraction solute = Moles of solute / Total moles

Mole fraction solvent = Moles of solvent / Total moles

Total moles = Moles of solute + Moles of solvent

1.39 moles of solute + 0.543 moles of solvent = 1.933 moles → Total moles

Mole fraction H₂O = 1.39 / 1.933 → 0.72

Mole fraction C₂H₅OH= 0.543 / 1.933 → 0.28

Remember that sum of mole fractions = 1

8 0
2 years ago
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Hiw to separate and measure a mixture of iron fillings, sugar, and salt
Alecsey [184]
Add water to mixture to dissolve sugar then filter. sugared water will be the filtrate while the salt & iron fillings will be the residue. use magnet to attract iron fillings and remaining will be salt.
3 0
3 years ago
What is the molar mass of lead nitrate (Pb(NO3)2) from the equation below?
AveGali [126]

Answer:

331.2 g/molExplanation:

3 0
3 years ago
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