Answer:
77.58g/mol
Explanation:
Let the rate of effusion of NO2 be R1
The rate of effusion of the unknown gas(R2) = 0.770R1
Molar Mass of NO2 (M1) = 14 + (2x16) = 14 + 32 = 46g/mol
The molar mass of the unknown gas (M2) =?
R1/R2 = √(M2/M1)
R1/0.770R1 = √(M2/46)
1/0.770 = √(M2/46)
Take the square of both sides
(1/0.770)^2 = M2/46
Cross multiply to express in linear form
M2 = (1/0.770)^2 x 46
M2 = 77.58g/mol
The molar mass of the unknown gas is 77.58g/mol
1, When temperature is increased the volume will also increase. this is because the particles will gain kinetic energy and bombard the walls of the container of the gas at a higher frequency, therefore, for the pressure to remain constant as per Charles' law, the volume will have to increase so that the rate of bombardment remains constant. This is explained by the Charles law which states that the volume of a gas is directly proportional to the absolute temperature provided pressure remains constant.
2. When temperature is Decreased the volume will also Decrease. this is because the particles will loose kinetic energy and bombard the walls of the container of the gas less frequently, therefore, for the pressure to remain constant as per Charles' law, the volume will have to reduce so that the rate of bombardment remains constant. This is explained by the Charles law which states that the volume of a gas is directly proportional to the absolute temperature provided pressure remains constant.
3. When temperature is increased the pressure will increase. This is because the gas particles gain kinetic energy and bombard the walls of the container more frequently. this is according to Pressure law which states that for a constant volume of a gas the pressure is directly proportional to absolute temperature
4. When temperature is decreased, pressure will decrease, This is because the gas particles lose kinetic energy and bombard the walls of the container less frequently. this is according to Pressure law which states that for a constant volume of a gas the pressure is directly proportional to absolute temperature
5. When particles are added, pressure will increase. This is because the bombardment per unit area also increases. Boyles law explains this, that at fixed temperature the volume of a gas is inversely proportional to the pressure.
6. When particles are removed, the pressure will decrease. This is because the bombardment per unit area also decreases. Boyle's law explains this, that at fixed temperature the volume of a gas is inversely proportional to the pressure.
Answer 1): The correct option is black putrefaction
Explanation:
There five stages in which body decomposition occurs:
- Initial decay: The bacteria in body starts breaking down the body tissues into simpler compounds
- Putrefaction: Bacteria starts getting multiplied the body and further decomposes the body with release in gases with bad odor.
- Black putrefaction : Due to decomposition color of the body changes with initial stage of internal body parts to start getting liquefy.
- Fermentation: Fermentation of all internal organs by bacteria.
- Dry decay: Body starts drying : skin and bones get dried.
Answer 2): the correct option is (D).
Explanation:
Since the evidence are lying on floor, walls and ceiling the perspective sketch will be the best way to draw out the crime scene as it will give a brief picture regarding all the evidences with respect to their relative positions on the crime scene to the investigating officer and other team members.
<em>n</em> = 3. The principal quantum number must be at least 3 to have a magnetic quantum number <em>ml</em> = -2
The rules are:
• <em>n</em> > 0
• <em>l </em>< <em>n</em>
• |<em>ml</em>| ≤ <em>l
</em>
Thus, if <em>ml</em> = -2, <em>l</em> ≥ 2.
If <em>l </em>≥ 2 and n ><em> l</em>, the allowed values of <em>n</em> are 3, 4, 5, etc.
The smallest allowed value of <em>n</em> is <em>n</em> = 3<em>.
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