Answer:
How is the ocean important to human survival? The air we breathe: The ocean produces over half of the world's oxygen and absorbs 50 times more carbon dioxide than our atmosphere. Climate regulation: Covering 70 percent of the Earth's surface, the ocean transports heat from the equator to the poles, regulating our climate and weather patterns
Explanation:
<u>Answer:</u> The equilibrium concentration of NO is 0.0034 M
<u>Explanation:</u>
We are given:
Initial moles of nitrogen gas = 0.20 moles
Initial moles of oxygen gas = 0.15 moles
Volume of container = 1.0 L
We know that:
So, 
The given chemical reaction follows:
<u>Initial:</u> 0.20 0.15
<u>At eqllm:</u> 0.20-x 0.15-x 2x
The expression of 
follows:
![K_c=\frac{[NO]^2}{[N_2]\times [O_2]}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BNO%5D%5E2%7D%7B%5BN_2%5D%5Ctimes%20%5BO_2%5D%7D)
We are given:
Putting values in above equation, we get:
Neglecting the negative value of 'x' because concentration cannot be negative.
So, equilibrium concentration of NO = 2 x = (2 × 0.0017) = 0.0034 M
Hence, the equilibrium concentration of NO is 0.0034 M
Answer:
A small mass of positive charge was discovered in the center of the atom.
Explanation:
Atoms is the combination of protons, neutrons, as well as electrons particles. The particles that are in the centre of atom is Protons and neutrons, which made up the nucleus, this nucleus is surrounded by electron.
The discovery that directly caused scientists to revise this model of the atom is that A small mass of positive charge known as proton, and a positive charge particle was discovered by Ernest Rutherford, in the center of the atom in the year 1900. Ernest Rutherford through his research resulted to splitting of the atom during nuclear reaction and proton was discovered.
the molecules of O2 that are present in 3.90 L flask at a temperature of 273 K and a pressure of 1.00 atm is 1.047 x 10^23 molecules of O2
calculation
Step 1: used the ideal gas equation to calculate the moles of O2
that is Pv=n RT where;
P(pressure)= 1.00 atm
V(volume) =3.90 L
n(number of moles)=?
R(gas constant) = 0.0821 L.atm/mol.K
T(temperature) = 273 k
by making n the subject of the formula by dividing both side by RT
n= Pv/RT
n=[( 1.00 atm x 3.90 L) /(0.0821 L.atm/mol.k x273)]=0.174 moles
Step 2: use the Avogadro's law constant to calculate the number of molecules
that is according to Avogadro's law
1 mole = 6.02 x10^23 molecules
0.174 moles=? molecules
by cross multiplication
the number of molecules
= (0.174 moles x 6.02 x10^23 molecules)/ 1 mole =1.047 x 10^23 molecules of O2
