Answer:
<em>C</em> H2SO4 = 9.79 M
Explanation:
- molarity (M) ≡ # dissolved species / V sln
- H2SO4 ↔ H3O+ + SO4-
∴ %w/w H2SO4 = 960% = g H2SO4 / g sln * 100
⇒ 9.6 = g H2SO4 / g sln
calculation base: 1000 g sln
⇒ g H2SO4 = 9600g
⇒<em> </em>mol<em> </em>H2SO4 =<em> </em>9600 g H2SO4 * ( mol H2SO4/ 980g H2SO4 ) = 9.796 mol H2SO4
⇒ V sln = 1000g sln / 1000g/L = 1 L sln
∴ ρ H20 ≅ 1000 Kg/m³ = 1000 g/L
⇒ <em>C</em> H2SO4 = 9.796 mol H2SO4 / 1 L sln
⇒ <em>C</em> H2SO4 = 9.796 M
In a gas, the partcles are very far apart and loose.
Answer:
Bohr Atomic Model : In 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus. ... To remedy the stability problem, <em><u>Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy.</u></em>
Answer:
Water quality and ability to support life
Explanation:
The level of dissolved oxygen in an aquatic environment is an indicator of such water quality and the degree to which it can support the growth of aquatic organisms. Dissolved oxygen too low or too high will be harmful to aquatic organisms
The molecular weight of an unknown gas is 613.8 kg.
<u>Explanation:</u>
RMS or root mean square velocity is given by the formula,
RMS =
where R is the gas constant = 8.314 kgm²s⁻²K⁻¹mol⁻¹
T is the temperature in Kelvin = 50 + 273 = 323 K
Molar mass of the Nitrogen gas in kg is 0.028 kg/mol
So we can find the RMs of the nitrogen by plugin the above values in the above equation, we will get,
RMS =
= 536.4 m/s
Now we have to take half of RMS as 268.2 m/s
Now we have to rearrange the equation to get M as,
M =
Now the temperature is T = 130 + 273 = 403 K
Plugin the values as,
M =
= 613.8 kg/mol
So the molecular weight of an unknown gas is 613.8 kg.