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3 years ago

4. What do the numbers in Carbon-12 and Carbon-14 represent?!

Chemistry

1 answer:

kaheart [24]3 years ago

3 0

Answer:

The number in C-12 and C-14 represent their atomic masses.

Explanation:

The number in C-12 and C-14 represent their atomic masses.

These two are the isotopes of carbon.

Isotopes of an element have same atomic number and different atomic masses due to different number of neutrons present.

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus. All these three subatomic particles construct an atom.

All isotopes of carbon have same number of electrons and protons i.e, six

while C-14 has 8 neutrons and C-12 has six neutrons.

C-14 = 14-6 = 8

C-12 = 12-6 = 6

Thus sum of neutrons and protons is atomic mass that's why C-14 has 14 atomic mass (8+6=14) while C-12 has 12 atomic mass (6+6=12).

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2 years ago

A 5 g sample of pure gold has a density of 19.3 g/ml. Your friend purchased a gold ring that was made of 25 g of pure gold. What

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Answer:

96.5 g/ml

Explanation:

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2 years ago

Read 2 more answers

What mass of hbr (in g) would you need to dissolve a 3.4 −g pure iron bar on a padlock?

vivado [14]

Given:

Mass of pure iron (Fe) = 3.4 g

To determine:

Mass of HBr needed to dissolve the above iron

Explanation:

Reaction between HBr and Fe is

Fe + 2HBr → FeBr₂ + H₂

Based on the reaction stoichiometry-

1 mole of Fe reacts with 2 moles of HBr

# moles of Fe = mass of Fe/atomic mass of Fe = 3.4/56 g.mol⁻¹ = 0.0607 moles

Therefore # moles of HBr = 2*0.0607 = 0.1214 moles

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Mass of HBr = 0.1214 moles * 81 g/mole = 9.83 g

Ans: Mass of HBR required is 9.83 g

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3 years ago

d. Butanol has the chemical formula C4H,OH. Write and balance the chemical reaction for the combustion of butanol.

valentina_108 [34]

Answer:

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Explanation:

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2 years ago

Salt dissolved in water is a solution, therefore _____.

saveliy_v [14]

Answer: Correct options are as follows.

salt is not chemically bonded to water.

salt and water retain their own chemical properties.

Explanation:

When salt is dissolved in water then it means that it is a physical change as salt has completely dissociated into ions but they are not chemically combined to the water molecules.

As a result, both salt and water will retain their chemical properties.

For example, NaCl when dissolved in water will dissociate as follows.

$NaCl \rightarrow Na^{+} + Cl^{-}$

Only the particles of salt have evenly distributed in water.

And, when a components of a salt chemically combine with another substance then it will form a new compound.

Therefore, we can conclude that salt dissolved in water is a solution, therefore:

salt is not chemically bonded to water.

salt and water retain their own chemical properties.

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3 years ago