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LiRa [457]
3 years ago
13

A sample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. H

ow much
potassium-40 was in the sample originally if the half-life of potassium-40 is 1.3 billion years?
A. 4.20
B. 8.40 g
c. 12.6 g
D. 16.8 g
E. 25.2 g
Chemistry
2 answers:
Katyanochek1 [597]3 years ago
8 0

Answer:

The correct answer is b

Explanation:

Arte-miy333 [17]3 years ago
4 0

Answer:

Correct Answer is (B)

Explanation:

Got it right on plato Chemistry Post test

<em>Hope I helped you out :)</em>

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You would be most likely to use a slicing machine if you were using the __________ method to produce cookies.
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You would be most likely to use a slicing machine if you were using the <u>icebox </u>method to produce cookies.

In the icebox method a type of cookie in which the dough is made, rolled into a stick, and refrigerated until the dough hardens. The dough can be removed from the refrigerator, cut into individual pieces, and then baked. The rest of the dough is returned to the refrigerator until needed.

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7 0
1 year ago
A gas starts at a volume of 23 L and a pressure of 1.23 atm. What is the new pressure if you
Anna71 [15]

Answer:

<h2>1.89 atm</h2>

Explanation:

The new volume can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

Since we are finding the new volume

V_2 =  \frac{P_1V_1}{P_2}  \\

From the question we have

V_2 =  \frac{1.23 \times 23}{15}  =  \frac{28.29}{15}  \\  = 1.886

We have the final answer as

<h3>1.89 atm</h3>

Hope this helps you

7 0
2 years ago
What scientific instrument is capable of measuring very small masses?​
marusya05 [52]

Answer:

Electronic balances.

Explanation:

5 0
3 years ago
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What is the basic principle of chromatography process ​
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process by which one separates compounds from one another by passing a mixture through column that retains some compounds longer than others.

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A nomenclatura para a estrutura seguinte, de acordo com o sistema da IUPAC é: (1 Ponto) CH3-CH2-CH2-CH2-CH2-CH-C-CH2-CH3 3,4-dim
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#2 Thanks hope thus help

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