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3 years ago

Why rock from earth cannot be used to determine earth age

1 answer:

5 0

Answer:So far scientists have not found a way to determine the exact age of the Earth directly from Earth rocks because Earth's oldest rocks have been recycled and destroyed by the process of plate tectonics. If there are any of Earth's primordial rocks left in their original state, they have not yet been found.

Explanation:

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Which nuclide has a half-life that is less than one minute?

Elena-2011 [213]

I think a good strategy for these kind of problems is to just choose the atom with the highest mass number. At any rate, the answer actually is (and I guessed it as) (2) Francium-220. It has a half life of about 30 seconds.

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3 years ago

Read 2 more answers

If 5.00lb of potatoes cost $3.60,how much would 1.30kg of potatoes cost?

Nana76 [90]

Answer:

the correct answer is $2.06

Explanation:

hope it'll help you...

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2 years ago

What is the total volume of gaseous products formed when 116 liters of butane (C4H10) react completely according to the followin

Contact [7]

Answer: The total volume of the gaseous products is 1044.29 L

Explanation:

We are given:

Volume of butane = 116 L

At STP:

22.4 L of volume is occupied by 1 mole of a gas

So, 116 L of volume will be occupied by = $\frac{1}{22.4}\times 116=5.18mol$ of butane

The chemical equation for the combustion of butane follows:

$2C_4H_{10}(g)+13O_2(g)\rightarrow 8CO_2(g)+10H_2O(g)$

For carbon dioxide:

By Stoichiometry of the reaction:

2 moles of butane produces 8 moles of carbon dioxide

So, 5.18 moles of butane will produce = $\frac{8}{2}\times 5.18=20.72mol$ of carbon dioxide

Volume of carbon dioxide at STP = (20.72 × 22.4) = 464.13 L

For water vapor:

By Stoichiometry of the reaction:

2 moles of butane produces 10 moles of water vapor

So, 5.18 moles of butane will produce = $\frac{10}{2}\times 5.18=25.9mol$ of water vapor

Volume of water vapor at STP = (25.9 × 22.4) = 580.16 L

Total volume of the gaseous products = [464.13 + 580.16] = 1044.29 L

Hence, the total volume of the gaseous products is 1044.29 L

3 0

3 years ago

During aerobic respiration, electrons travel downhill in which sequence? A) food → citric acid cycle → ATP → NAD+

mina [271]

During aerobic respiration, electrons travel downhill in which sequence?
B) food → NADH → electron transport chain → oxygen

7 0

3 years ago

What is true of a molecule? A. All molecules of a compound have the same properties. B. Each molecule of a compound has differen

lions [1.4K]

Answer: A. or C. (most likely C.)

Explanation:

All molecules of a compound have the same properties. ... All molecules of a compound have one type of atom.

Jeez, they r both true.....go with A. or C.

Hope this helps!

3 0

4 years ago

Why rock from earth cannot be used to determine earth age​

Why rock from earth cannot be used to determine earth age