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lara [203]
3 years ago
10

1. If you have 25% radioactive parent atoms in a mineral crystal, and 75% daughter atoms, how many half-lives have passed?

Chemistry
1 answer:
Andreyy893 years ago
5 0
Too freaking many... or maybe not many at all

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The process by which water is moved and changed through the earth is called
Dima020 [189]

Answer:

evaporation

Studies have revealed that evaporation—the process by which water changes from a liquid to a gas—from oceans, seas, and other bodies of water

Explanation:

8 0
3 years ago
What type of waves are sound waves?
luda_lava [24]
Heya!!!


Answer to your question:

D)transverse


Sound waves are transverse waves.

Hope it helps ^_^
6 0
3 years ago
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Explain why different liquids boil at the different temperatures
Gennadij [26K]

The boiling point of the fluid depends on the intermolecular forces between the fluid atoms and molécules, as these forces must be disrupted to switch from a fluid to a gas. The stronger the intermolecular forces, the greater the point of boiling.

4 0
3 years ago
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What mass of sodium chloride contains 4.59 x 10 24 formula units?
shtirl [24]
The term formula units means molecules.

Then, what you are looking for is the mass in 4.59*10^24  molecules.

The procedure involves to convert the 4.59 * 10^24 molecules into moles and use the molar mass of the sodium chloride.

1) Number of moles = 4.59 * 10^24 molecules / (6.02 * 10^23 molecules/mol) = 7.62 mol

2) Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol

3) mass of NaCl = molar mass *  number of moles = 58.44 g/mol * 7.62 mol = 445.31 g of NaCl

Answer: 445.31 g of NaCl.

 
7 0
3 years ago
7. A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she
Anna35 [415]
The one in the middle since when ur going down it’s more quicker anc faster .
8 0
3 years ago
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