3 years ago

Why is carbon used to date things that were once living?

1 answer:

6 0

Explanation:

Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon. ... The carbon-14 method was developed by the American physicist Willard F.

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I believe it is true!

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What is the pOH of a solution that has an H+=7.7x10^-7 M

pentagon [3]

Answer:

Explanation:

Step 1

The question is based on the concept of PH and pOH calculations.

pH is defined as negative logarithmic of hydronium Ion concentration.

while pOH is defined as negative logarithmic of hydroxide ion concentration of the solution.

Step 2

[H+] = 7.7*10-7 M

pH = -log[H+]

= -log ( 7.7*10-7 )

= 6.12

Step 3

pOH = 14 - pH

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3 years ago

a sample of an unknown metal has a mass of 21.6g and volume of an 8.00cm3 calculate the density of the unknown metal

Strike441 [17]

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question we have

$density = \frac{21.6}{8} \\ = 2.7$

We have the final answer as

Hope this helps you

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