Answer : Option D) Silicates.
Explanation : The minerals with the silicon-oxygen structures are classified as silicates.
As per the definition, A silicate is any member of a family which has anions consisting of silicon and oxygen, usually they have the general formula as [SiO].
It usually has a structure which has a central silicon ion which has a charge of (+4) while each oxygen has a charge of negative two (-2) and thus each silicon-oxygen bond is equal to one half (1/2) of the total bond energy of oxygen. Therefore, it confirms that the answer is Silicates.
Answer: ![R=4.82436 \frac{Pa. m^{3}}{mol. K}](https://tex.z-dn.net/?f=R%3D4.82436%20%5Cfrac%7BPa.%20m%5E%7B3%7D%7D%7Bmol.%20K%7D)
Explanation:
The Ideal Gas equation is:
(1)
Where:
is the pressure of the gas
the number of moles of gas
is the gas constant
is the absolute temperature of the gas in Kelvin.
is the volume
It is important to note that the behavior of a real gas is far from that of an ideal gas, taking into account that <u>an ideal gas is a single hypothetical gas</u>. However, under specific conditions of standard temperature and pressure (T=0\°C=273.15 K and P=1 atm=101,3 kPa) one mole of real gas (especially in noble gases such as Argon) will behave like an ideal gas and the constant R will be
.
However, in this case we are not working with standard temperature and pressure, therefore, even if we are working with Argon, the value of R will be far from the constant of the ideal gases.
Having this clarified, let's isolate
from (1):
(2)
Where:
is the absolute temperature of the gas in Kelvin.
![V=8.8 dm^{3}=0.0088 m^{3}](https://tex.z-dn.net/?f=V%3D8.8%20dm%5E%7B3%7D%3D0.0088%20m%5E%7B3%7D)
(3)
Finally:
Answer:
<em>D</em><em>.</em><em>They have properties similar to those of their component elements.</em><em> </em>
Explanation:
When elements are joined, the atoms lose their individual properties and have different properties from the elements they are made of .
4 moles of NaCl is produced from 2 moles of Na₂CrO₄.
<u>Explanation:</u>
Given reaction is
PbCl₂(aq) + Na₂CrO₄(aq)→ PbCrO₄(s) + 2 NaCl (aq)
It is the balanced equation which means that on both sides of the equation, number of atoms of each element are equal.
From the above balanced equation it says that molar ratio of Na₂CrO₄ to NaCl is 1 : 2.
That is 1 mole of Na₂CrO₄ produces 2 moles of NaCl, so the molar ratio is 1:2.
2 moles of Na₂CrO₄ produces 4 moles of NaCl.
So the molar ratio of Na₂CrO₄ to NaCl is 2: 4.
The density of this gas is 0.20 g/L.
<h3>What is density?</h3>
The density of a substance is the measure of how densely it is packed together. The mass per unit volume is how it is formally defined. The symbol for density: d
The density formula is given by d = m/v, where m is the object's mass and v is its volume.
Given that,
Molar volume of non ideal He gas (v) = 20 L/mol
Molar mass of He gas (m) = 4.0 g/mol
As we know, density of this gas (d) = mass (m) / volume (v)
= 4.0g /20L
= 0.20 g/L
Thus, density of this gas is 0.20 g/L
To know more about density refer to:
brainly.com/question/1354972
#SPJ4