A compound of which element is used as a diet supplement to prevent thyroid problems?
a. Chlorine
b. Calcium
c. Carbon
d. Iodine
d
You might also like to view...
A jar holds 2.0 L of ideal nitrogen gas, N2, at STP. The atomic mass of nitrogen is 14.0 g/mol, the ideal gas constant is R = 8.31 J/mol ? K,
Avogadro's number is NA = 6.022 × 1023 molecules/mol, and 1.00 atm = 101 kPa. (a) How many moles of nitrogen are in the jar? (b) How many nitrogen molecules are in the jar? (c) What is the mass of the nitrogen in the jar?
In an electromagnetic wave, the electric and magnetic fields are oriented such that they are
A) parallel to one another and perpendicular to the direction of wave propagation. B) parallel to one another and parallel to the direction of wave propagation. C) perpendicular to one another and perpendicular to the direction of wave propagation. D) perpendicular to one another and parallel to the direction of wave propagation.
Fatty acid molecules can also align to form a bilipid layer that extends in 3-dimensions. Shown below is a cross section of this structure. What is this structure called? (Hint: it forms the basis of all life.)
A) DNA B) a nucleoside C) a cell D) a gene
At a distance of 10 m from a light bulb the rms value of the electric field is 16 V/m. What is the rms value of the electric field at a distance of 20 m from the light bulb?
A. 32 V/m B. 16 V/m C. 8.0 V/m D. 4.0 V/m E. 2.0 V/m