Laboratory stock solution is prepared-initial activity

Reference no: EM13663418

A medical laboratory stock solution is prepared by an initial activity due to ₂₄Na of 3.0 mCi/mL, and 20.0mL of the stock solution is diluted at t₀ = 0to a working solution whose total volume is 250 ml. After 48 h, a10.0 mL sample of the working solution is monitored with a counter. What is the measured activity? (Note that 1 mL = 1 millilitre.)

Reference no: EM13663418

Questions Cloud

How far does the pike move during this strike : When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.7 m/s in 0.11 s. How far does the pike move during this strike? A driver has a reaction time of 0.50 s, and the maximum deceleration of her car is 6.0 m/s 2. She is..

The fifth brightest star in the night sky : Astronaut Benny travels to Vega, the fifth brightest star in the night sky, leaving his 35.0-year-old twin sister Jenny behind on Earth. Benny travels with a speed of 0.9994 c, and Vega is 25.3 light-years from Earth. How much does Benny age when he ..

What is the required radius : A wire carrying a current of 8.00 A is to be formed into a circular loop of one turn. If the required value of the magnetic field at the center of the loop is 10.0 µT, what is the required radius?

Re-establish emf induced among ends of rod at initial value : A conducting rod is moving during a magnetic field, as in the drawing. The magnetic field strength is 0.65 T, and the speed of the rod is 4.8 m/s. Abruptly, the field strength decreases to 0.48T. To what value must the speed v of the rod be adjusted ..

Laboratory stock solution is prepared-initial activity : A medical laboratory stock solution is prepared by an initial activity due to 24 Na of 3.0 mCi/mL, and 20.0mL of the stock solution is diluted at t 0 = 0to a working solution whose total volume is 250 ml. After 48 h, a10.0 mL sample of the work..

Simple harmonic motion on friction less horizontal surface : A 5.7kg block attached to a spring executes simple harmonic motion on a frictionless horizontal surface. At time t=0s, the block has a displacement of -.70m, a velocity of -.80m/s and an acceleration of 2.7m/s^2. The amplitude of the motion is closes..

Undergoes a constant negative acceleration of magnitude : A car initially traveling at 23.6 m/s undergoes a constant negative acceleration of magnitude 1.70 m/s squared after its brakes are applied. How many revolutions does each tire makebefore the car comes to a stop, assuming the car does not skid and th..

Compute focal length of lens from its index of refraction : Lens Maker: Compute the focal length of a lens from its index of refraction and radii of curvatures of the two refracting surfaces. If the index of refraction of the glass utilized is 1.50, one surface is concave and has a radius of curvature of 13.4..

Water pressure at ground in a hose 2cm in diameter : A water tank is full to a depth of 10 m and the tank is 20 m above ground. The water pressure at ground in a hose 2cm in diameter is..?

User Account

All Pages