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pishuonlain [190]
3 years ago
6

The Colorado River carved out a deep canyon in the habitat of an Albert's squirrel population. This is an example of which stage

of speciation

Chemistry
2 answers:
neonofarm [45]3 years ago
8 0

For future peeps, the correct answer is:

C. The populations become totally separated from one another.  

It may be a different letter on your quiz, but on mine it was C.

Zinaida [17]3 years ago
3 0
B is the answer! i hope this helps


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What is the Law of Octaves?
kicyunya [14]

i believe the answer would be D. When ordered by atomics mass every eighth element has similar properties.

4 0
2 years ago
What amount of the excess reagent remains when 0.30 mol NH3 reacts with 0.40 mol O2 to produce NO and H2O? 4NH3 +502 + 4NO + 6H2
nirvana33 [79]

Answer: (D) 0.025 mol O_2

Explanation:

The given balanced equation is :

4NH_3+5O_2\rightarrow 4NO+6H_2O

According to stoichiometry :

4 moles of ammonia (NH_3) reacts with = 5 moles of oxygen (O_2)

Thus 0.30 moles of  ammonia  (NH_3)  reacts with = \frac{5}{4}\times 0.30=0.375 moles of oxygen (O_2)

Now as given moles of oxygen are more than the required amount, oxygen is the excess reagent.

moles of oxygen (O_2) left = 0.40 - 0.375 = 0.025

Thus 0.025 mol O_2 excess reagent remains.

7 0
2 years ago
Calculate the amount in moles and grams of KMnO4 present in 3dm^3 of 0.25M​
Stels [109]

Answer:

Number of moles   = 0.75 mol

Mass = 118.5 g

Explanation:

Given data:

Number of moles of KMnO₄ = ?

Mass in gram = ?

Molarity of KMnO₄ = 0.25 M

Volume of KMnO₄ solution = 3 dm³ (3 L)

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles  / L of solution

0.25 M = number of moles / 3 L

Number of moles   = 0.25 M× 3 L

            M = mol/L

Number of moles   = 0.75 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 0.75 mol × 158 g/mol

Mass = 118.5 g

5 0
2 years ago
A 50.0 mL sample of 0.00200 M AgNO3 is added to 50.0 mL of 0.0100 M NaIO3. What is the equilibrium concentration of Ag in soluti
Nana76 [90]

The equilibrium concentration of Ag⁺ in the solution is : 7.5 * 10⁻⁶ M

<u>Given that :</u>

Ksp for AgIO₃ = 3 * 10⁻⁸

<h3>Determine the equilibrium concentration of Ag in the solution </h3>

<u>First step</u> : Calculate the concentration of Ag⁺ and IO⁻₃ in the solution

[ Ag⁺ ] = ( mmol Ag⁺ / mL solution )

          = ( 50 * 0.00200 / 100 mL ) = 0.001 M

[ IO⁻₃ ] = ( mmol IO⁻₃ / mL solution )

           = ( 50 * 0.0100 / 100 mL )  = 0.005 M

<u>Next </u>determine the Ionic product ( Q )

Q = [ Ag⁺ ] [ IO⁻₃ ]

   = 0.001 * 0.005

   = 5 * 10⁻⁶  

Since the value of Q is > Ksp a precipitate ( IO⁻₃ )  will be formed after the completion of the precipitation reaction

Therefore the concentration of the excess  IO⁻₃  = 0.400 mmol / 100 mL

                                                                                 = 0.004 M

<u>Second step</u> : considering the initial and final concentrations

Initial concentrations ( mol/ L )                  Final concentrations ( mol/L )

[ Ag⁺ ] = 0 M                                                  [ Ag⁺ ]  = x

[ IO⁻₃ ] = 0.004 M                                          [ IO⁻₃ ] = 0.004 + x

<u>Final step </u>: Determine the equilibrium concentration of Ag in the solution

Ksp = 3 * 10⁻⁸ = [ Ag⁺ ]  [ IO⁻₃ ]

                      =  ( x ) ( 0.004 + x )

Therefore x = 7.5 * 10⁻⁶ ( Equilibrium concentration of Ag in the solution )

Hence we can conclude that The equilibrium concentration of Ag⁺ in the solution is : 7.5 * 10⁻⁶ M

Learn more about equilibrium concentration : brainly.com/question/13414142

6 0
1 year ago
Convert 132 cm to km
cestrela7 [59]

132 cm to 0.00132 km.

there you go, hope this helps!

5 0
3 years ago
Read 2 more answers
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