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Archy [21]
3 years ago
13

( i need help on this one )

Chemistry
1 answer:
lara [203]3 years ago
7 0

Answer:

1. False

2.True

Explanation:

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It is longer than a solar eclipse

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Which of the five most abundant elements are metals?
Gala2k [10]

Answer:

Oxygen

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Explanation:

Oxygen=47 percent

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Calcium=3.5 percent

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Number of molecules in 4HCl​
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How would I complete and balance the equation <br> Mg + Br2 &gt;
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3 0
3 years ago
What is equal to the number of particles in 36 grams of carbon-12?
HACTEHA [7]

Answer:

3 moles

Explanation:

To solve this problem we will  use the Avogadro numbers.

The number 6.022×10²³ is called Avogadro number and it is the number of atoms, ions or molecules in one mole of substance.  According to this,

1.008 g of hydrogen = 1 mole =  6.022×10²³  atoms.

18 g water = 1 mole = 6.022×10²³ molecules

we are given 36 g of C-12. So,

12 g of C-12 = 1 mole

24 g of C-12 =  2 mole

36 g of C-12 = 3 mole

So 3 moles of C-12 equals to the number of particles in 36 g of C-12.

4 0
2 years ago
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