Questlon 23 of 30

Explain the chemistry behind global warming in 3-5 sentences

Oliga [24]

Answer:

When factories mass produce something it produces smoke. That smoke can be harmful to something called the ozone layer. The ozone layer is part of earth's atmosphere that protects us from the suns burning heat. When that layer is damaged the sun's heat burns through heating up the world and melting ice causing the water levels to rise. All of this can make working conditions less safe, cause more flooding, and have the sun cause cancer.

8 0

3 years ago

Which of the following is true of an effective scientific model?

kow [346]

CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC IDK

6 0

3 years ago

An alkyne of six carbon atoms gives the same single product in its reaction either with bh3 in thf followed by h2o2 /oh–, or wit

Alexeev081 [22]

Two compounds containing six carbon atoms on treatment with either with BH₃ in THF followed by H₂O₂ /OH⁻ (OR) with H₂O / Hg²⁺ / H₃O⁺ gives the same products.
The two alkynes, their two different types of reactons and products are given below,

7 0

3 years ago

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What is the formula and name of the compound produced at the end of the virtual lab, and what caused it to have a different appe

Iteru [2.4K]

Answer: $SnO_2$ , $NO_2$ and $H_2O$ are formed at the end of the reaction. They are named as tin (IV) oxide or stannic oxide, nitrogen dioxide and water respectively.

Explanation: Reaction of tin and nitric acid is given as:

$Sn(s)+4HNO_3(aq.)\rightarrow SnO_2(s)+4NO_2(g)+2H_2O(l)$

Three products are formed at the end of the reaction which are:

$SnO_2$ which is termed as stannic oxide or Tin (IV) oxide. This is a white colored solid.

$NO_2$ which is termed as nitrogen dioxide. These are brown colored fumes.

$H_2O$ which is termed as water.

At the starting tin was a silvery-white colored solid and after the reaction, it changed the color to milky-white. This change in color is due to the chemical reaction happening between tin and nitric acid.

Release of brown fumes are also an indication that a chemical reaction has taken place.

6 0

3 years ago

Phosphorus pentachloride decomposes at higher temperatures. PCl5(g) ⇄ PCl3(g) + Cl2(g) An equilibrium mixture at some temperatur

aliya0001 [1]

Answer:

The reaction shifts from right to left. The new concentration of PCl₅ in equilibrium is 1.133 M.

Explanation:

The stress applied to the system is the addition of Cl₂. To offset this stress, some Cl₂ reacts with PCl₃ to produce PCl₅ until a new equilibrium is established.

The net reaction therefore shifts from right to left, that is,

PCl₅ (g) ← PCl₃ (g) + Cl₂ (g)

To work with the Kc expression, we need to convert the grams to moles. Since the volume of the flask is 1 liter, the moles can be expressed as molarity.

For PCl₅:

208.23 g ---------- 1 mol

3.74 g -------------- x= 1.80 x10⁻² mol ⇒ 1.80 x10⁻² M

For PCl₃:

137.33 g ---------- 1 mol

4.86 g ------------- x= 3.54 x10⁻² mol ⇒ 3.54 x10⁻² M

For Cl₂:

70.91 g ---------- 1 mol

3.59 g ----------- x= 5.06 x10⁻² mol ⇒ 5.06 x10⁻² M

Now, taking into account the shift of the equation, we make an ICE chart:

PCl₅ (g) ← PCl₃ (g) + Cl₂ (g)

i) 1.80 x10⁻² 3.54 x10⁻² 5.06 x10⁻²

c) +x -x +1.31 x10⁻² -x

e) 1.80 x10⁻² +x 3.54 x10⁻² -x 5.06 x10⁻²+1.31 x10⁻² -x

Now, we write the Kc formula:

Kc = [PCl₃] [Cl₂] / [PCl₅]

Kc = [ 3.54 x10⁻² -x] [5.06 x10⁻²+1.31 x10⁻² -x] / [1.80 x10⁻² +x]

After working with the expression, we find that x = 1.115.

Therefore, the new concentration of PCl₅ will be 1.133 M.

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3 years ago

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