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3 years ago

4. Why is radiocarbon measurement useless when trying to measure things that died

Chemistry

1 answer:

julsineya [31]3 years ago

4 0

Answer:

Radiocarbon measurement or radiocarbon dating is a method that is used to measure the age of the carbon-based material in living organisms.

Radiocarbon dating is able to estimate age of fossils that are younger than 50,000 years and unable to measure things that died longer than 200,000 years ago because fossils that are too old do not contain carbon or carbon get vanished from too old fossils of organisms. Some of the fossils also get contaminated due to environmental conditions and during teh collection or preservation process.

Thus, radiocarbon measurement is useless when trying to measure most rocks older than 50,000 years.

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When Rutherford performed his experiment, only 1 in 20,000 alpha particles bounced straight back or were

Anna007 [38]

Answer:

when rutherford performed his experiment, only 1 in 20,000 alpha particles bounced straight back or were deflected greatly. the rest went straight through the gold foil. e) based on this evidence, what is in atom's center? positively charged particles.

Explanation:

7 0

3 years ago

Read that From picture and tell me the answer please

Dafna11 [192]

Answer:

1g Hydrogen

Explanation:

<h3>Getting to the equation:</h3>

Calcium in water reacts vigorously to give a cloudy white Precipitate (compound) called Calcium hydroxide alongwith the evolution of Hydrogen gas.

$\boxed{ \mathsf{Ca + H_2O \rightarrow Ca(OH)_2 + H_2}}$

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

<h3>Balancing the equation: </h3>

This reaction is not in it's balanced form! The number of atoms of Hydrogen on the left is 2 while that on the right is 4,I.e.,they're not equal.

Adding a 2 in front of H2O solves the problem by making the number of atoms of each element on both the sides equal.

$\mathsf{Ca +2 H_2O \rightarrow Ca(OH)_2 + H_2}$

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

<h3>Observations:</h3>

Looking into the equation more carefully, we see:

1 atom of Calcium reacts with 2 molecules of water to give 1 molecule of Calcium Hydroxide alongwith 1 molecule of Hydrogen gas.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

<h3>Gram atomic and molecular masses </h3>

Mass of one atom of Calcium = it's gram atomic mass

= 40 g

Mass of one "molecule" of Hydrogen

= it's Gram molecular mass

= gram mass of one atom × number of atoms in one molecule

= 1 × 2

= 2 g

So,

according to our observation:

One atoms of Calcium gives one molecule of Hydrogen (during the particular reaction)

=> 40g of Calcium gives = 2g of Hydrogen

•°• 1 g of Calcium gives = $\frac{2}{40}$

= $\frac{1}{20}$ g Hydrogen

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<h3>Answer:</h3>

We're provided with 20g of Calcium,

=> 20g of Calcium gives = 20 × $\frac{1}{20}$ g H2

= 1 g H2

_______________

Hope this helps!

6 0

3 years ago

The thioketal product of a certain reaction is given below. draw the structure of:

SVETLANKA909090 [29]

https://images.app.goo.gl/NnQUnwKUPa7d2nAt5 go here to get to get your anwser

8 0

3 years ago

What mass in grams of fructose is contained in 325 mL of a 1.5 M fructose solution

STALIN [3.7K]

87.75 g of fructose

Explanation:

molar concentration = number of moles / volume (L)

number of moles = molar concentration × volume

number of moles of fructose = 1.5 × 0.325

number of moles of fructose = 0.4875 moles

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of fructose = 0.4875 × 180

mass of fructose = 87.75 g

Learn more about:

molar concentration

brainly.com/question/13971392

#learnwithBrainly

3 0

3 years ago

AlCl3 is lewis acid. Explain how?

professor190 [17]

For AlCl3 to be a Lewis acid, it would have to react in such a way that it accepted a lone pair from some other atom or molecule from a Lewis base.AlCl3 has an electron-deficient aluminum atom. It has only six electrons in its valence shell. It readily accepts electrons from other atoms, in an attempt to get a full valence shell of eight electrons.

3 0

4 years ago