Please help super emergency!!4.00 x 10^23 molecules of H3PO4 have an approximate mass of
a. 8g.
b. 65g.
c. 147 g.
d. 663g.

Since the Mg is in excess, therefore HCl will be fully consumed in the reaction.

The first step is to find the amount of HCl in mol

Let  N (HCl) = amount of HCl in mol

N (HCl) = (6 mol HCL/L solution) *( 125 mL ) * (1 L/1000 mL) = 0.75 mol of HCl

Through stoichiometry

N (H2) = 0.75 mol HCl * (1 mol H2/ 2 mol of HCl)

N(H2) = 0.375 mol H2

 Since we are asked for the number of grams of H2 (mass), we multiply this with the molar mass of hydrogen

M (H2) = 0.375 mol H2 ( 2 g H2 / 1 mol H2)

M (H2) = 0.75 g H2 

Answer: option # 4, the collisions of the gas particles may result in the transfer of energy.

Explanation:

The kinetic molecular theory (KMT) explains the behavior and properties of gases in terms of the energy, the size, and the motion of the gas particles.

In terms of size, according to the KMT the gases are formed by small particles separated from each other in a vacuum. The volume of the particles is negligible and it is considered that they do not occupy any space.

Since the particles are separated they do not exert either attraction or repulsion to each other.

Regarding the motion, the particles are in constant random motion. They move in straight lines until collide with other particles or with the walls of the veseel. The collisions are elastic (the total kinetic energy is conserved). The kinetic energy may be trasferred between the particles, but the total kinetic energy does not change.

The kinetic energy and the temperature are related: the temperature is a measure of the average kinetic energy of the particles of gas. At a given temperature all the gases have the same average kinetic energy.

Now, check every choice:

1)The gas particles are arranged in a regular pattern:

False. The particles occupy all the volumen and are in random motion.

2) The force of attraction between the gas particles are strong:

False. The particles are separated and they do not exert any force on each other.

3) The gas particles are hard spheres in continuous circular motion.

False. The particles travel in straight until they collide.

4) The collisions of the gas particles may result in the transfer of energy.

True. When particles collide they may transfer kinetic energy but the total kinetic energy is conserved.

Final answer:

In Kinetic Molecular Theory, an ideal gas is described as a collection of widely separated molecules in constant motion, colliding and possibly transferring energy. These molecules do not have a regular arrangement or exert strong forces of attraction. The theory supports the ideal gas law, linking kinetic energy to temperature.

Explanation:

According to the Kinetic Molecular Theory, the correct statement describing the particles of an ideal gas is: 'The collisions of the gas particles may result in the transfer of energy'. In this model, gases consist of widely separated molecules that are constantly in motion and colliding with each other and with the container walls, which can result in energy transfer.

Molecules of an ideal gas are not characterized by a regular pattern of arrangement nor strong forces of attraction between the particles; in fact, the theory assumes that the gas molecules exert no attractive or repulsive forces on each other or the container walls. These collisions are termed elastic as they do not involve a loss of energy.

The Kinetic Molecular Theory accounts for the behavior of gases and also supports the ideal gas law, which articulates a proportional relationship between the average kinetic energy of the gas molecules and the kelvin temperature of the gas.

Learn more about Kinetic Molecular Theory here:

brainly.com/question/15013597

#SPJ3

Answer:

The specific heat capacity of the metal is 1.143 J/g°C

Explanation:

A typical excersise of calorimetry:

Q = m . C . ΔT

ΔT = Final T° - Initial T°

m = mass

In this case, the heat released by the metal is gained by the water to rise its temperature.

Qmetal = Qwater

(We consider that metal was at the same T° of water)

22.5 g  . C . (65°C - 25.55°C) = 25 g .  4.184 J/g°C . (35.25°C - 25.55°C)

22.5 g  . C . 39.45°C = 25g . 4.184 J/g°C . 9.7°C

887.625 g.°C . C = 1014.62J

C = 1014.62J / 887.625 g.°C

C = 1.143 J/g°C

Answer : The heat released by the eater is, [/tex]

Explanation :

Formula used :

or,

where,

Q = heat released = ?

m = mass of water = 200 g

c = specific heat of water =

= initial temperature  =

= final temperature  =

Now put all the given value in the above formula, we get:

[/tex]

Therefore, the heat released by the eater is, [/tex]