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laiz [17]
3 years ago
5

PLS HELP!!! WILL GIVE BRAINLIEST!!! Really easy, I am just horrible at this stuff.

Chemistry
2 answers:
otez555 [7]3 years ago
6 0

Answer:

B: Igneous, C: Metamorphic, D: Sedimentary

Explanation:

Sorry, i dont know A

Fynjy0 [20]3 years ago
3 0
I think it’s c sorry if I’m wrong
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2. How many moles of sodium Na will react with 6 moles of sulfur S?
fredd [130]

Answer:

12 moles of Na

Explanation:

5 0
2 years ago
How many molecules are in 128g of H2O?
Lelechka [254]

Answer:

4.28x10^24 molecules

Explanation:

From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules. From the above, we understood that 1mole of H2O also contains 6.02x10^23 molecules.

1mole of H2O = (2x1) + 16 = 2 + 16 = 18g

Now, if 18g of H2O contains 6.02x10^23 molecules,

Then 128g of H2O will contain = (128x 6.02x10^23) /18 = 4.28x10^24 molecules

3 0
2 years ago
A material has a volume of 63.0 cm3 and a mass of 28 grams.  What is the density of the material in g/cm3 to the correct number
dimaraw [331]

Answer:

0.4444 g/cm³ ≅ 0.44 g/cm³ (2 significant figures).

Explanation:

  • Knowing that:

<em>d = m/V,</em>

where, d is the density of the material (g/cm³).

m is the mass of the material (m = 28 g).

V is the volume of the material (V = 63.0 cm³).

<em>∴ d = m/V </em>= (28 g)/(63.0 cm³) = <em>0.4444 g/cm³ ≅ 0.44 g/cm³ (2 significant figures).</em>

7 0
2 years ago
What do the dots around a symbol in a Lewis structure represent?
anzhelika [568]
B. valence electrons
3 0
2 years ago
The primitive atmosphere of Earth may have favored the abiotic synthesis of organic molecules because it __________.
ASHA 777 [7]

Answer and Explanation:

The primitive atmosphere of Earth may have favored the abiotic synthesis of organic molecules because it **had close to no oxygen, hence, it was powerfully reducing. It had pure energy sources too in form of ultraviolet rays from the sun (it was extremely hot! Too hot for water in liquid form to exist in fact!), outgassing from the numerous volcanoes and lightning**.

Abiotic synthesis means a formation reaction where the reactants are charged to become products, almost all on their own, with no catalyst especially.

So, these factors would have helped the organic molecules to form as most of what is needed to overcome the energy barrier and become products.

7 0
3 years ago
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