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Masja [62]
2 years ago
15

Due to decay of ⁴⁰K, cow’s milk has a specific activity of about 6X10⁻¹¹mCi per milliliter. How many disintegrations of ⁴⁰K nucl

ei are there per minute in an 8.0-oz glass of milk?
Chemistry
1 answer:
FromTheMoon [43]2 years ago
5 0

When we discuss radioactive isotope activity, we consider how many decays or disintegrations occur per unit of time. Therefore, activity is determined by the quantity of disintegrations over time. Ah, the becquerel, or B que, is a measurement unit that is widely used to quantify activity. It is equivalent to one decay or one disintegration per second. Therefore, we occasionally shorten it to one d. per s. The curie, denoted by the letters C I, is a second unit we used to denote activity. The result is 1.4 times 10 to the negative 11. Curie's modify this to Beck, Carell's One Curie from curies. His 10 times 10 times 3.7 's Becca Rell And we are aware that one Decorah is equal to one Decay every second. Therefore, we multiply by 1.4 x 10 - 11 times. There are 5 to 5 decays per second, or 3.7 x 10 to the 10 refined. There is one more conversion because my query now asks us what this would be in decays per minute. We multiply 60 by 5.5 to 5 to get the number of decays per minute from our activity and decays per second. This yields 32 decays per minute, which is significant at 30.

<h3>What are isotopes?</h3>

Isotopes are two or more atom types that have the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element but have distinct nucleon numbers (mass numbers) as a result of having a different number of neutrons in their nuclei. Although the chemical properties of each isotope of a particular element are almost identical, they differ in their atomic weights and physical characteristics.

To learn more about isotopes:

brainly.com/question/11680817

#SPJ4

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Answer: ...

Explanation:

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Iron reacts with oxygen gas to produce iron (III) oxide. If there are 52 grams of
IRISSAK [1]

Mass of Fe₂O₃ : 74.26 g

Volume of O₂ at STP = 15.624 L

<h3>Further explanation</h3>

Reaction

4Fe (s) + 3O₂ (g) ==> 2Fe₂O₃ (s)

mol Fe :

Ar Fe = 56 g/mol

\tt \dfrac{52}{56}=0.93

mol Fe₂O₃ :

\tt \dfrac{2}{4}\times 0.93=0.465

mass Fe₂O₃ :

MW Fe₂O₃ : 159,69 g/mol

\tt 0.465\times 159,69=74.26~g

mol O₂ :

\tt \dfrac{3}{4}\times 0.93=0.6975

volume O₂ at STP(1 mol=22.4 L)

\tt 0.6975\times 22.4=15.624~L

7 0
3 years ago
How many 10 x 10 x 10” boxes Cane Bay pack into a crate that is 30 x 30 x 30
madam [21]

Answer:

its 3

3 x 10 = 30

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Explanation:

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3 years ago
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How are mutations different? Provide examples.
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Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 2.10 g of ethane is
puteri [66]

Answer:

Ethane is the limiting reactant, so no mass of ethane will be left over by the chemical reaction. All the mass will react, the 2.1 grams of ethane.

Explanation:

First of all, we need to determine the reaction and the limiting reactant to work with the stoichiometry.

The equation is: 2C₂H₆ + 7O₂ →  4CO₂ + 6H₂O

We define the moles of the reactants:

2.10 g / 30 g/mol = 0.07 moles of ethane

12 g / 32 g/mol = 0.375 moles of oxygen

To determine the limiting reactant, we start with oxygen:

7 moles of O₂ can react with 2 moles of ethane

Then, 0.375 moles of O₂ will react with (0.375 . 2) / 7= 1.31 moles of ethane.

We do not have enough ethane, just only 0.07 moles to react.

Ethane is the limiting reactant, so no mass of ethane will be left over by the chemical reaction. All the mass will react, the 2.1 grams of ethane.

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