What is true of a molecule?

What type of rock would be formed in this plant-rich swamp?

adell [148]

We are asked to identify what type of rock would be formed in a plant-rich swamp. We all know that plant dies and the remain leaves in the soil called peat. Temperature, pressure and heat causes the remains to submerged under the soil bed layer and converts it into a waxy substance called kerogen. Kerogen then mixes with the rock under the soil bed layer to create what is called an oil shale. Oil shale is somehow similar to a coal. Both creates an energy when ignited. Therefore the correct answer to the question being asked is COAL or Oil Shale.

7 0

3 years ago

A highway engineer is researching de-icing compounds for clearing ice from streets in winter. She wants a compound that has +2 i

wolverine [178]

Magnesium combined with chlorine.

How?

Look at the question .Compound has -1 charge in it .Hence it contains Halogen.
Looking at the options Option B and C contain Iodine and chlorine i.e halogens .

Now come to metals side.

Potassium has valency 1(Look the Electronic configuration below)

$\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^1$

Hence it will contain +1 charge which is omitted directly .

Now come to option C.

Magnesium has charge +2(Look at EC below

$\\ \sf\longmapsto 1s^22s^22p^63s^2$

Hence the compound formed is given by

$\\ \sf\longmapsto MgCl_2$

Hence option C is correct.

3 0

3 years ago

Help please!! I need to turn this in by midnight! EST

nignag [31]

Answer:

FIREWORKS : WHEN FIREWORKS EXPLODE THEY EXPEL SMOKE WHICH IS A FORM OF GAS AND THEY LIGHT UP WHICH IS ANOTHER CHEMICAL REACTION AND OF COURSE THE WHOLE FIREWORK GETS HOT ( Temperature rises )

Explanation:

you could see your reaction happens when original substance changes in color temperature formation produces light or gas in many other things

( besides it's original form! )

answer what changed from it's original form!

ex: baking a cake:

the cake change form ( rising ) due to heat ( rising temperature )

REACTION WAS:

- formation of precipitate ( solid to settle out of a solution )

- change I'm temperature to bake the cake

Extra:

you got this!

I hope I helped even just a little!

8 0

2 years ago

What was the troposphere

Alexeev081 [22]

Answer:

The lowest region of the atmosphere

6 0

3 years ago

Please with this problem

olasank [31]

<h3>Answer:</h3>

Empirical Formula = C₃H₈O₃

Molecular Formula = C₃H₈O₃

<h3>Solution:</h3>

Data Given:

Mass of Sample = 9.2 g

Mass of Carbon = 3.6 g

Mass of Hydrogen = 0.8 g

Mass of Oxygen = 9.2 - (3.6 + 0.8) = 4.8 g

Step 1: Calculate Moles of each Element;

Moles of C = Mass of C ÷ At.Mass of C

Moles of C = 3.6 ÷ 12.01

Moles of C = 0.2997 mol

Moles of H = Mass of H ÷ At.Mass of H

Moles of H = 0.8 ÷ 1.01

Moles of H = 0.7920 mol

Moles of O = Mass of O ÷ At.Mass of O

Moles of O = 4.8 ÷ 16.0

Moles of O = 0.3000 mol

Step 2: Find out mole ratio and simplify it;

C H O

0.2997 0.7920 0.3000

0.2997/0.2997 0.7920/0.2997 0.3000/0.2997

1 2.64 1.001

Multiply by 3,

3 7.92 ≈ 8 3

Hence, Empirical Formula = C₃H₈O₃

Step 3: Calculating Molecular Formula:

Molecular formula is calculated by using following formula,

Molecular Formula = n × Empirical Formula ---- (1)

Also, n is given as,

n = Molecular Weight / Empirical Formula Weight

Molecular Weight = 92 g.mol⁻¹

Empirical Formula Weight = 12 (C₃) + 1.01 (H₈) + 16 (O₃) = 92.08 g.mol⁻¹

So,

n = 92 g.mol⁻¹ ÷ 92 g.mol⁻¹

n = 1

Putting Empirical Formula and value of "n" in equation 1,

Molecular Formula = 1 × C₃H₈O₃

Molecular Formula = C₃H₈O₃

7 0

3 years ago