The period of oscillation of a simple pendulum is `T=2pisqrt(L//g)`. Measured value of L = 20.0 cm known to 1mm accuracy and time for 100 oscillations of the pendulum is found to be 90s wearing a wristwatch of Is revolution. What is the accuracy in determination of g.

The potential for the cell below is found to be 0.25V. Pt(s) | H_(2)(g) | H^(+) ( aq), 1 mol // L || Cu^(2+) ( aq, C mol // L ) | Cu(s) What is the value of C ?

Consider a certain reaction A to products, with k = 2.0 xx 10^(-2)" s"^(-1) . Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol "L"^(-1) .

The rate of decomposition of NH_3 on platinum surface, 2NH_(3) (g) overset(Pt) (to) N_(2) (g) + 3H_(2) (g) is rate =k order with k = 2.5 xx 10^(-4)" mol L"^(-1)" s"^(-1) . What are the rates of production of N_2 and H_2 ?

For the decomposition of N_(2) O_(5) given as, N_(2) O_(5) (g) to N_(2) O_(4) (g) + 1//2O_(2) (g) If the rate law =K [N_(2) O_(5) ] and K=1.68 xx 10^(-2)" s"^(-1) , starting with 2.5 moles, of N_(2) O_(5)(g) in a 5.0"L" container at 298K, how many moles of N_(2) O_(5) would remain after 1.0 minutes?

Consider the following cell reaction, 2Fe(s) + O_(2)(g) + 4H^(+)(aq) rarr 2Fe^(2+) ( aq) + 2H_(2) O ( l ) , E^(@) = 1.67 V At [ Fe^(2+) ] = 10^(-3) M, p ( O_(2)) = 0.1 atm and pH =3. What is the cell potential at 25^(@)C ?