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shtirl [24]
3 years ago
11

50 POINTS.

Chemistry
2 answers:
Vladimir79 [104]3 years ago
7 0

#1. The correct answer is A.

#2. The correct answer is

      -A.  Minimum Viable Population (MVP)

      -B.  Increase.

      -C. Death rate decreases.

#3. The correct answer is B.

#4. The correct answer is B.

#5. The correct answer is:

-A. Decrease.

-B. Decrease.

-C. Increase.

-D. Decrease.

-E. Increase.

Hope this helps ya!! (:

Masja [62]3 years ago
5 0

Answer:

#1. The correct answer is A.

#2. The correct answer is

     -A.  Minimum Viable Population (MVP)

     -B.  Increase.

     -C. Death rate decreases.

#3. The correct answer is B.

#4. The correct answer is B.

#5. The correct answer is:

-A. Decrease.

-B. Decrease.

-C. Increase.

-D. Decrease.

-E. Increase.

Read more on Brainly.com - brainly.com/question/11750267#readmore

Explanation:

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0.50 g of hydrogen chloride (HCl) is dissolved in water to make 4.0 L of solution. What is the pH of the resulting hydrochloric
svlad2 [7]

Explanation:

Given the mass of HCl is ---- 0.50 g

The volume of solution is --- 4.0 L

To determine the pH of the resulting solution, follow the below-shown procedure:

1. Calculate the number of moles of HCl given by using the formula:

number of moles of a substance=\frac{given mass of the substance}{its molecular mass}

2. Calculate the molarity of HCl.

3. Calculate pH of the solution using the formula:

pH=-log[H^+]

Since HCl is a strong acid, it undergoes complete ionization when dissolved in water.

HCl(aq)->H^+(aq)+Cl^-(aq)

Thus, [HCl]=[H^+]

Calculation:

1. Number of moles of HCl given:

number of moles of a substance=\frac{given mass of the substance}{its molecular mass}\\=0.50g/36.5g/mol\\=0.0137mol

2. Concentration of HCl:

Molarity of HCl=\frac{number of moles of HCl}{its molar mass}\\=\frac{0.0137 mol}{4.0 L} \\= 0.003425 M

3. pH of the solution:

pH=-log[H^+]\\=-log(0.003425)\\=2.47

Hence, pH of the given solution is 2.47.

3 0
3 years ago
When KOH dissolved in ethanol, what is the intermolecular attraction between OH- ions and C2H5OH molecules
mezya [45]
Lon-dipole will be your answer
5 0
3 years ago
Does iron always have a charge of 2+ when it forms an ion
Usimov [2.4K]

Answer:

Roman numeral notation indicates charge of ion when element commonly forms more than one ion. For example, iron(II) has a 2+ charge; iron(III) a 3+ charge.

Explanation:

8 0
3 years ago
A student runs an experiment in the lab and then uses the data to prepare an Arrhenius plot of the natural log of the rate const
Thepotemich [5.8K]

Answer:

21.86582KJ

Explanation:

The graphical form of the Arrhenius equation is shown on the image attached. Remember that in the Arrhenius equation, we plot the rate constant against the inverse of temperature. The slope of this graph is the activation energy and its y intercept is the frequency factor.

Applying the equation if a straight line, y=mx +c, and comparing the given equation with the graphical form of the Arrhenius equation shown in the image attached, we obtain the activation energy of the reaction as shown.

5 0
3 years ago
List the subshells that hold the 25 electrons in a<br> manganese atom in order of increasing energy
jonny [76]

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d5

Explanation:

According to the Aufbau principle, electrons are filled in orbitals in order of increasing energy. The energy of orbitals in the electronic configuration of manganese increases from left to right, hence 3d orbital is much greater in energy than a 3p orbital.

The arrangement of orbitals in order of increasing energy is shown in the answer above.

4 0
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