18 g glucose (C6H12O6) is added to 178.2 g water. The vapour pressure of water (in torr) for this aqueous solution is :
The following reaction is performed at 298 K.
The standard free energy of formation of NO(g) is 86.6 kJ/mol at 298 K. What is the standard free energy of formation of NO2(g) at 298 K ? (KP=1.6×1012)
The period of oscillation of a simple pendulum is T=2πgL. Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution. The accuracy in the determination of g is :
The supply voltage to a room is 120 V. The resistance of the lead wires is 6 Ω A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?
Let Tnbe the number of all possible triangles formed by joining vertices of an n-sided regular polygon. If Tn+1−Tn=10, then the value of n is
A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is :