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vovikov84 [41]
3 years ago
13

Which could cause topsoil to be lost?

Chemistry
2 answers:
GaryK [48]3 years ago
5 0
Wind and water erosion because it is the factors that lead to deterioration
kherson [118]3 years ago
3 0

Answer:

It's A) wind and water erosion

<em>Hope</em><em> </em><em>this helps</em><em>.</em><em>.</em><em> </em>

<em>Good</em><em> </em><em>Luck</em><em>!</em><em> </em>

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2. For the reaction, 2SO2(g) + O2(g) 2SO3(g), at 450.0 K the equilibrium con¬stant, Kc, has a value of 4.62. A system was charge
miv72 [106K]

Answer:

Q >> Kc

We have more products than reactans. To reach the equilibrium, the balance will shift to the left.

Explanation:

Step 1: Data given

Temperature = 450.0 K

Kc = 4.62

When Kc > Q, we have more reactants than products. To reach the equilibrium, the balance will shift to the right

When Kc < Q, we have more products than reactans. To reach the equilibrium, the balance will shift to the left.

When Kc = Q,the equiation isatequilibrium

[SO3] = 0.254 M

[O2] = 0.00855 M

[SO2] = 0.500 M

Step 2: The balanced equation

2SO2(g) + O2(g) ⇄ 2SO3(g)

Step 3: Calculate the Q

Q = [SO3]² / [O2][SO2]²

Q = 0.254²/ (0.500 * 0.00855²)

Q = 1765

Q >> Kc

We have more products than reactans. To reach the equilibrium, the balance will shift to the left.

6 0
4 years ago
Read 2 more answers
Which of the following are considered pure substance??
Shkiper50 [21]

Answer:

Explanation:

I’m 99.9% sure that it’s an element because it can’t be broken down any more than it already is.

7 0
4 years ago
The chemical formula of aspirin is C9H8O4. What is the mass of 0.40 mol<br> of aspirin?​
dybincka [34]

Answer:

\boxed {\boxed {\sf About \ 72 \ grams }}

Explanation:

To convert from moles to grams, we must use the molar mass (also known as the gram formula mass).

First, look up the molar masses of the elements in the formula.

  • C: 12.011 g/mol
  • H: 1.008 g/mol
  • O: 15.999 g/mol

Next, multiply by the subscript, because it tells us the number of atoms of each element in the formula.

  • C₉: 4(12.011 g/mol)= 108.099 g/mol
  • H₈: 8(1.008 g/mol)= 8.064 g/mol
  • O₄: 4(15.999 g/mol)= 63.996 g/mol

Add the values.

  • 108.099 + 8.064+63.996=180.159 g/mol

Use this molar mass as a ratio.

\frac {180.159 \ g \  C_9H_8O_4}{1 \ mol \ C_9H_8O_4}

Multiply by the given number of moles, 0.40

0.40 \ mol \ C_9H_8O_4 *\frac {180.159 \ g \  C_9H_8O_4}{1 \ mol \ C_9H_8O_4}

The units moles of aspirin cancel.

0.40  *\frac {180.159 \ g \  C_9H_8O_4}{1 }

72.0636 \ g \ C_9H_8O_4

The original number of moles has 2 sig figs (4 and 0), so answer must have the same. For the number we calculated, it is the ones place. The 0 in the tenth place tells us to leave the 2.

72 \ g

5 0
3 years ago
Which of the following forms a new substance? melting, evaporating, freezing or burning
Slav-nsk [51]
It would be burning be cause when you freeze, evaporate, or melt anything it is just changing how fast the atoms are moving . Think of it like water, ice, and steam, they are all the same thing but in different forms because of melting, evaporating,and melting. Burning is breaking it down.
4 0
4 years ago
Read 2 more answers
If an element has the atomic mass (A) of 80 and its atomic number (Z) is 35, how many neutrons does it have?
Katena32 [7]

Answer:ummm 45

Explanation: I feel like im sure of it

8 0
3 years ago
Read 2 more answers
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