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3 years ago

The two most abundant elements in earth's core are ?

Chemistry

2 answers:

musickatia [10]3 years ago

8 0

Answer:

Iron and Nickel

Explanation:

The outer core is about 1,400 miles thick, and it's made mostly of a combination (called an alloy) of iron and nickel, along with small amounts of other dense elements like gold, platinum, and uranium. These metals can, of course, be found on the surface of Earth in solid form. Ur welcome.

vesna_86 [32]3 years ago

3 0

The two most abundant elements in Earths core are Iron and Nickel.

Hope this helps!

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22.99 on the element sodium means the combined numbers of electrons and protons?

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10. How many g of Cu(OH)2 can be made from 9.1 x 1025 atoms of O?

il63 [147K]

Molar mass Cu(OH)₂ = 97.561 g/mol

97.561 g Cu(OH)₂ --------------- 6.02x10²³ atoms
? g Cu(OH)₂ -------------------- 9.1x10²⁵ atoms

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mass = 8.87x10²⁷ / 6.02x10²³

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3 years ago

Energy in a chemical reaction can be identified as which of the following?

daser333 [38]

I believe it’s A..but I’m not quite sure.

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3 years ago

815 yd to km (need 3 sig fig)

SpyIntel [72]

<u>Answer:</u> The correct answer is 0.745 km

<u>Explanation:</u>

We are given:

A numerical value of 815 yards

To convert this into kilometers, we use the conversion factor:

1 km = 1093.6 yards

Converting the given value into kilometers, we get:

$\Rightarrow 815yd\times \frac{1km}{1093.6yd}=0.745km$

Hence, the correct answer is 0.745 km

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3 years ago