Answer:
Explanation:
Given that:
Half life = 30 min
Where, k is rate constant
So,
The rate constant, k = 0.0231 min⁻¹
Using integrated rate law for first order kinetics as:
Where,
is the concentration at time t
is the initial concentration
Given that:
The rate constant, k = 0.0231 min⁻¹
Initial concentration = 7.50 mg
Final concentration = 0.25 mg
Time = ?
Applying in the above equation, we get that:-
The answer is c because it is going to the light bulb
Answer:
C. Hold polar molecules together.
Explanation:
This is just something you have to know.
The pressure in mmHg forecasted today is 783 mmHg
Pressure is the force acting perpendicular to the area of a surface. Pressure is given by:
Pressure = Force/Area
The pressure of a gas is the force exerted on the walls of its container by the gas. Pressure can be measured in atm, mmHg, etc.
1 atm = 760 mmHg
1.03 atm = 760 mmHg per atm * 1.03 atm = 783 mmHg
Therefore the pressure in mmHg forecasted today is 783 mmHg
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Answer:
Explanation:
- The atomic mass of nitrogen is 14.0067 g/mol.
- The atomic mass of oxygen is 15.9994 g/mol.
This means the molecular mass of nitrogen dioxide is g/mol.
Dividing this molecular mass of the compound we need to find, we get that
.
So, the final answer is