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3 years ago

Which factor causes chemical weathering it for science

Chemistry

2 answers:

VMariaS [17]3 years ago

7 0

Answer:

acid or sunlight

Explanation:

blsea [12.9K]3 years ago

6 0

Acids. Sunlight and wind DO cause weathering, but not chemical weathering, just erosion. Only acids fundamentally alter the chemical structure of what it interacts or corrodes with.

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A chemical reaction that is expected to form 325.0 gof product only forms 123.8 g of product. What is the percent yield of this

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Answer:

$\boxed {\boxed {\sf A. \ 38.1 \%}}$

Explanation:

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$\% \ yield = \frac{actual \ yield}{theoretical \ yield} *100$

For this reaction, the theoretical or expected yield is 325.0 grams. The actual yield is 123.8 grams.

$\% \ yield = \frac{ 123.8 \ g }{325.0 \ g }*100$

Divide.

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$\% \ yield = 38.0923077$

Round to the nearest hundredth. The 9 in the hundredth place tells us to round the 0 to a 1 .

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The percent yield is about <u>38.1%</u>

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3 years ago

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The radioactivity due to carbon-14 measured in a piece of a wood from an ancient site was found to produce 20 counts per minute

ss7ja [257]

Answer:

The answer is "17200 years".

Explanation:

Given:

$A = 20 \ \frac{counts}{minute}\\\\A_{o} = 160\ \frac{counts}{minute}$

Let the half-life of carbon-14, is beta emitter, is $T = 5730\ years$

Constant decay $\ w = \frac{0.693}{ T}$

$= 1.209 \times 10^{-4} \ \frac{1}{year}\\$

The artifact age $t= ?$

$A = A_{o} e^{-wt} \\\\e^{-wt} = \frac{A}{A_{o}}\\\\-wt = \ln \frac{A}{A_{o}}\\\\= -2.079\\\\t = 1.7199 \times 10^{4} \ years\\\\\sim \ 17200\ years\\$

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3 years ago

Which factor causes chemical weathering​ it for science

Which factor causes chemical weathering it for science