<h3><u>Answer;</u></h3>
True
<h3><u>Explanation</u>;</h3>
- The molecule NH3 contains all single bonds.
- NH3 has a three single covalent bond among its nitrogen and hydrogen atoms,because one valence electron of each of three atom of hydrogen is shared with three electron.
- There are three covalent bonds are in NH3 . Each hydrogen make a single bond with nitrogen and there is also a pair of electron which is unpaired from nitrogen.
The volume of 0.20 moles of helium at STP is 4.5 liters.
Explanation:
Given:
Number of moles = 0.20 moles
To Find:
The volume of Helium at STP =?
Solution:
According to ideal gas law
PV = nRT
where
P is pressure,
V is volume,
n is the number of moles
R is the gas constant, and
T is temperature in Kelvin.
The question already gives us the values for p and T
,because helium is at STP. This means that temperature is 273.15 K and pressure is 1 atm
.
We also already know the gas constant. In our case, we'll use the value of
0.08206 L atm/K mol since these units fit the units of our given values the best
On substituting these values we get
![1 atm \times V = 0.20 moles \times 0.08206 L atm/K mol](https://tex.z-dn.net/?f=1%20atm%20%5Ctimes%20%20V%20%3D%200.20%20moles%20%20%5Ctimes%20%200.08206%20L%20atm%2FK%20mol)
![V = \frac{0.20 moles \times 0.08206 L atm/K mol }{ 1 atm}](https://tex.z-dn.net/?f=V%20%3D%20%5Cfrac%7B0.20%20moles%20%20%5Ctimes%20%200.08206%20L%20atm%2FK%20mol%20%7D%7B%201%20atm%7D)
![V = \frac{4.482}{1}](https://tex.z-dn.net/?f=V%20%3D%20%5Cfrac%7B4.482%7D%7B1%7D)
V = 4.5 Liters
And this is y I should of paid attention in that one science class in middle school that taught this...
( ̄▽ ̄;)
Work out the number of moles in
100.00 grams of the oxide.
For nitrogen: The atomic mass of N is 14.0067, and we have 36.84 g N:
36.84 g N14.0067 g N/mol N=2.630 mol N
For oxygen: The atomic mass of O is
15.9994, and we have
100.00−36.84=63.16 g O:
63.16 g N 15.9994 g N/mol N=3.948 mol N
Now the ratio 3.958 2.630 is very close to
1.5=32
. So we conclude that the gas has three moles
O to two moles N making the empirical formula
N2O3.
<h2>
<u>Mark as Brainliest</u></h2>
Answer:
I am explain you in image