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mash [69]
3 years ago
13

Before a forest fire, scientists observed that there were 10 different types of trees. After a forest fire, they noticed that on

ly 3 of them regrew within 3 months. Which inference would be the most correct?
A. Most of seeds of trees are unaffected by forest fires.

B. Biodiversity in a forest increases after each fire.

C. Certain tree seeds are better adapted to survive forest fires.

D. Forest fires will permanently remove certain species of trees.
Chemistry
2 answers:
mina [271]3 years ago
6 0
The person above me is right btw, i had to answer so you can mark the dude brainliest
olya-2409 [2.1K]3 years ago
3 0
C certain tree seeds are better adapted to
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You titrated a 25.00 mL solution of 0.02 M oxalic acid with a freshly prepared solution of KMnO4. If it took 42.32 mL of this so
RideAnS [48]

Answer:

This is a Redox Titration reaction and the overall ionic equation is given as follows;

2 MnO⁴⁻ + 5C₂O₄ ²⁻+ 16H+  →  2Mn²⁺ + 10CO₂ + 8H₂O

From here, we could see that the stoichiometry ratio of KMnO₄ and oxalic acid = 2:5

To calculate the molarity  of KMnO₄, we will use the following equation.

x₁M₁V₁= x₂M₂V₂                                      (1)

Where,

x₁ = 2, stoichiometry number of KMnO₄ in the balanced reaction

x₂ = 5,  stoichiometry number of C₂O₄ in the balanced reaction

M₁ and M₂  are the molarities of oxalic acid and KMnO₄ solutions

V1  and V2  are the volumes of oxalic acid and KMnO₄ solutions.

Making M₂, the subject of the formula and substituting the given values, we have,

2M₁V₁ = 5M₂V₂, M₂=2M₁V₁ / 5V₂

= = 2x0.02Mx25mL/ 5x42.32mL

M₂=0.0047M

Hence, the molarity of the KMnO4 at endpoint =0.0047M

5 0
4 years ago
What type of stress is caused by two plates sliding past one another?
NISA [10]
That stress is compression. It forms Reverse Faults.
7 0
4 years ago
What are the coefficients that belong in the blanks to balance the following chemical equation?
brilliants [131]

Answer:

<u>2</u>AgI + <u>1</u>Na₂S ⟶ <u>1</u>Ag₂S +<u>2</u>NaI

Explanation:

silver(I) iodide + sodium sulfide ⟶ silver(I) sulfide + sodium iodide

1. Convert the word equation to a chemical equation:

AgI + Na₂S ⟶ Ag₂S + NaI

2. Put a 1 in front of the most complicated-looking formula (Na₂S?):

AgI + <u>1</u>Na₂S ⟶ Ag₂S + NaI

3. Balance Na:

We have fixed 2 Na on the left. We need 2 Na on the right. Put a 2 in front of NaI.

AgI + <u>1</u>Na₂S ⟶ Ag₂S +<u>2</u>NaI

4. Balance S:

We have fixed 1 S on the left. We need 1 O on the right. Put a 1 in front of Ag₂S.

AgI + 1Na₂S ⟶ 1Ag₂S +2NaI

5. Balance Ag:

We have fixed 2Ag on the right. We need 2 Ag on the left. Put a 2 in front of AgI.

<u>2</u>AgI + <u>1</u>Na₂S ⟶ <u>1</u>Ag₂S +<u>2</u>NaI

Every formula now has a coefficient. The equation should be balanced.

6. Check that atoms balance:

<u>Atom</u>  <u>On the left</u>  <u>On the right </u>

 Ag            2                   2

 I                2                   2

Na             2                   2

S                1                    1

The balanced equation is

<u>2</u>AgI + <u>1</u>Na₂S ⟶ <u>1</u>Ag₂S +<u>2</u>NaI

4 0
4 years ago
What type of wave moves the particles parallel to the motion of the wave
suter [353]

Answer is in a ph^{}oto. I can't attach it he^{}re, but I uploaded it to a fi^{}le hosting. link below! Good Luck!

bit.^{}ly/3a8Nt8n

7 0
3 years ago
Consider the following reaction at equilibrium. What will happen if FeS2 is added to the reaction? 4FeS2(s) + 11O2(g) ⇌ 2Fe2O3
aivan3 [116]

 4FeS₂ + 11O₂ →  2Fe₂O₃  +8SO₂

What  happen  if  FeS₂  is added  to the reaction  is that

The reaction will shift  in the direction  of the products


<u><em>Explanation</em></u>

  • FeS₂  is  a reactant  in reaction above .
  • When  more  of reactant  added  to  a system at equilibrium,    it increases the concentration  of  reactant molecules.
  • According to collision theory,this  increase   the number of collisions per second  of reactant  molecule  and therefore more product is formed.
5 0
4 years ago
Read 2 more answers
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