The type of energies or the words in this item
are matched with the given descriptions. The lists below are as follow.<span>
<span>a. The word that best match this description is MECHANICAL
energy. In most sources, mechanical energy is described to be that
energy that is possessed by an object with respect to its motion and position. </span>
<span>b. The answer to this item is LIGHT energy. This type
of energy can be created through different means (i.e. radiation, chemical, and
mechanical). This is the energy emitted by hot objects such as the sun, lasers,
and bulbs.</span>
<span>c. The type of energy that is transferred by the movement of
the electrons through a conductor is ELECTRICAL energy. The movement of
the electrons along the line is commonly called as the current. Moreover, this
is also a type of kinetic energy because of the movement of the electrons.
Thus, the faster the movement of the electron the higher is the energy. </span>
<span>d. The type of energy that is stored in batteries or food is
CHEMICAL energy. This type of energy is that which is stored in the
bonds of the different chemical compounds. This is also most commonly released
when reaction between elements/compounds happen.</span>
<span>e. The energy that travels through vibrations and waves is
SOUND energy. As given above, this is associated with the movement or
vibrations of the matter. This is also a type of mechanical energy because of
the waves produced through to the vibrations.</span>
<span>f. The type of energy that is found in the nucleus and atoms
is the NUCLEAR energy. Nuclear
reactions most often released this type of energy simultaneous with the
generation of heat. </span>
<span>g. The stored energy is called the POTENTIAL energy. The
equation for this energy is mgh where h is the height, pertaining to the
position of the object. Once the object is released, it will be converted to
other forms of energy. </span>
<span>h. The answer to this item is THERMAL energy. This type of
energy can be transferred in three different ways: (1) conduction, (2)
convection, and (3) radiation.</span></span>
Answer:
CHN
Explanation:
Please see attached picture for working.
Answer:
yes
Explanation:
to identify an atom you need to know either it's atomic number or it's proton number
while the neutron is used to determine it's atomic mass
Answer:
Molar mass = 32.64 g / mol.
The density of gas is 1.3 × 10⁻³g/mL.
Explanation:
Given data:
Mass of sample = 2.35 g
Pressure = 1.05 atm
Volume = 1.85 L (1.85 × 1000 = 1850 ml)
Temperature = 55 °C (55+ 273.15 = 328.15 K)
Density = ?
Formula:
d = m/ v
The volume of flask would be the volume of gas.
d = 2.35 g / 1850 mL = 0.0013 g/mL or 1.3 × 10⁻³g/mL
The density of gas is 1.3 × 10⁻³g/mL.
Molar mass:
Now we will calculate the moles of a gas first in order to find the molar mass of a gas.
Formula:
PV =nRT
n = number of moles.
n = PV / RT
n = 1.05 atm × 1.85 L / 0.0821 atm. dm³. K⁻¹ . mol⁻¹ × 328.15 K
n = 1.9425 atm . L / 26.941115 atm . dm.³mol⁻¹
n = 0.072 mol
Now we will find the molar mass.
Number of moles = mass / molar mass
0.072 mol = 2.35 g / molar mass
Molar mass = 2.35 g / 0.072 mol
Molar mass = 32.64 g / mol
Answer:
ΔH°f C₂H₅O₂N(s) = -537.2kJ
Explanation:
Based on the reaction:
4 C₂H₅O₂N(s) + 9O₂(g) → 8CO₂(g) + 10H₂O(l) + 2N₂(g)
ΔHrxn = ΔH°f products - ΔH°f reactants.
As:
ΔH°fO₂(g) = 0
ΔH°fCO₂(g) = -393.5kJ/mol
ΔH°fH₂O(l) = -285.8kJ/mol
ΔH°fN₂(g) = 0
The ΔHrxn is:
ΔHrxn = (8×-393.5kJ/mol + 10×-285.8kJ/mol) - (4×ΔH°fC₂H₅O₂N(s)) = -3857kJ/mol
-6006kJ/mol - (4×ΔH°fC₂H₅O₂N(s)) = -3857kJ/mol
-4×ΔH°fC₂H₅O₂N(s) = 2149kJ/mol
ΔH°fC₂H₅O₂N(s) = 2149kJ/mol / -4
<h3>ΔH°f C₂H₅O₂N(s) = -537.2kJ</h3>
