Small quantities of h2 gas can be collected by adding hcl to zn. a sample of 195 ml of h2 gas was collected over water at 25 c a
2 answers:
Answer:- 0.0153 grams
Explanation:- According to Dalton's law, the total pressure is the sum of individual pressures.
According to the ideal gas equation:'
Pressure of the gas = 729 mmHg = 0.96 atm (1mmHg=0.0013atm)
Volume of the gas = 195 mL = 0.195 L
Temperature of the gas = 25°C =(25+273)= 295K (0°C = 273 K)
R= gas constant = 0.0821Latm\Kmol
Mass of
You might be interested in
This is an incomplete question, here is a complete question.
If the initial concentration of NOBr is 0.0440 M, the concentration of NOBr after 9.0 seconds is ________.
The reaction
It is a second-order reaction with a rate constant of 0.80 M⁻¹s⁻¹ at 11 °C.
Answer : The concentration of after 9.0 seconds is, 0.00734 M
Explanation :
The integrated rate law equation for second order reaction follows:
where,
k = rate constant = 0.80 M⁻¹s⁻¹
t = time taken = 142 second
[A] = concentration of substance after time 't' = ?
= Initial concentration = 0.0440 M
Putting values in above equation, we get:
Hence, the concentration of after 9.0 seconds is, 0.00734 M
Answer:
The answer is "Option b and Option c".
Explanation:
This buffer is a buffer of ammonia and ammonium ion. Thus it requires the solution .
In point 1:
The solution containing at 1M concentration would be given by mixing the two solutions. Thus, this buffer is a legitimate route.
In point 2:
It gives the ions you want but they are not the same.
In point 3:
and
volume would not produce the same
concentrations. Therefore, this buffer isn't a valid route.
In point 4:
Some
volume and half
. This offers the same rate as half.