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olya-2409 [2.1K]
3 years ago
8

Como son los cambios en la pubertad? Estos cambios se producen con el mismo ritmo en todos los niños de esa edad? Que hormonas s

on las responsables de los cambios que se dan tanto en hombre y mujeres? PARA HOY PORFIS
Chemistry
1 answer:
kari74 [83]3 years ago
7 0

Answer:

Puberty stage include different types of changes including cognitive (emotional), physical (voice, pubic hair, genitalia, etc.) and physiological (synthesis of sex steroid hormones) modifications

Explanation:

Physical puberty changes in girls occur from ages 10  to 14 and they are associated with the growth of pubic and underarm hair, breast development, and the first menstrual period (known as menarche). In boys, puberty occurs from ages 10 to 20, being this period associated with the growth of the testicles, the growth of pubic hair, changes in the voice, presence of sperms in the seminal fluid, etc.

Puberty hormones:  

     - Boys and girls: gonadotrophin-releasing hormone (GnRH) required for the production of Follicle Stimulating (FSH) and Luteinizing (LH) hormones

     -Boys: testosterone  

     -Girls: estrogen

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Which of the following happens during an endothermic chemical change? (5 points)
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Answer: Products have a higher total potential energy than the reactants.

Explanation:

During endothermic reactions, energy is absorbed, meaning that the products will have more potential energy.

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Suppose 110.0 mL110.0 mL of hydrogen gas at STP combines with a stoichiometric amount of fluorine gas and the resulting hydrogen
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Suppose 110.0 mL of hydrogen gas at STP combines with a stoichiometric amount of fluorine gas and the resulting hydrogen fluoride dissolves in water to form 150.0 mL of an aqueous solution. 0.032 M is the concentration of the resulting hydrofluoric acid.

<h3>What is Balanced Chemical Equation ?</h3>

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

Now write the balanced chemical equation

H₂ + F₂ → 2HF

<h3>What is Ideal Gas ?</h3>

An ideal gas is a gas that obey gas laws at all temperature and pressure conditions. It have velocity and mass but do not have volume. Ideal gas is also called perfect gas. Ideal gas is a hypothetical gas.

It is expressed as:

PV = nRT

where,

P = Pressure

V = Volume

n = number of moles

R = Ideal gas constant

T = temperature

Here,

P = 1 atm   [At STP]

V = 110 ml = 0.11 L

T = 273 K   [At STP]

R = 0.0821   [Ideal gas constant]

Now put the values in above expression

PV = nRT

1 atm × 0.11 L = n × 0.0821 L.atm/ K. mol × 273 K

n = \frac{1\ \text{atm} \times 0.11\ L}{0.0821\ \text{L. atm/ K. mol} \times 273\ K}

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<h3>How to find the concentration of resulting solution ? </h3>

To calculate the concentration of resulting solution use the expression

C = \frac{n}{V}

   = \frac{0.0049}{0.15}  

   = 0.032 M

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