Ask question

Ask question

All categories

3 years ago

7

Why do California and Peru both have large deposits of gold?

1 answer:

irinina [24]3 years ago

3 0

Both California and Peru have or have had significant gold deposits because of their proximity to where two tectonic plate boundaries meet. Off the California coast there is the Pacific Plate and the North American Plate which meet at the San Andreas Fault but there also is the Farallon Plate which apparently has subducted somewhat below the North American Plate. Off Peru, the Nazca Plate is subducting under the South American Plate and which has caused the Andean orogeny.

You might be interested in

In the early 1960s, radioactive strontium-90 was released during atmospheric testing of nuclear weapons and got into the bones o

Advocard [28]

Answer:

52.54 %

Explanation:

Half life = 29 years

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$k=\frac {ln\ 2}{29.0}\ {years}^{-1}$

The rate constant, k = 0.023902 hour⁻¹

From 1964 to 1991:

Time = 27 years

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

So,

$\frac {[A_t]}{[A_0]}=e^{-0.023902\times 27}$

$\frac {[A_t]}{[A_0]}=0.5245$

<u>The strontium-90 remains in the bone = 52.54 %</u>

5 0

3 years ago

ILL GIVE U BRAINILIEST

Arte-miy333 [17]

1:3 hope DAT helps #ZedTheZom

5 0

2 years ago

What is the molecular formula for water?

Alexxandr [17]

Answer:

H2O

Explanation:

There are 2 hydrogen atoms and 1 oxygen atom

5 0

2 years ago

Read 2 more answers

If 48 g of magnesium reacts with oxygen gas, how many grams of magnesium oxide will be formed according to the following equatio

Aloiza [94]

think it maybe 48 mg0 because there should be 2g magnesium in the word equation

4 0

2 years ago

Read 2 more answers

Can you still identify and tell the appearance of each set of materials why?

Alenkasestr [34]

i need more information
sorry
good luck thoooo

6 0

2 years ago