A student needs 0.250 moles of iodine ('don't forget it's a BrINCIHOF - diatomic!)
for a reaction. What mass of iodine would
the student need to measure out for the
reaction
31.7 g
127 g
2549
63.5 g

63.5 g

Explanation:

Given data:

Number of moles of iodine needed = 0.250 mol

Mass to be measured = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of diatomic iodine = 253.8 g/mol

by putting values,

0.250 mol = mass / 253.8 g/mol

Mass = 0.250 mol × 253.8 g/mol

Mass = 63.5 g

Thus, student need to be measured 63.5 g of iodine.

35. a insulated cylinder of solid gold (k 310 kw/m-k) of radius v2 m and height 5 m is heated at one end until the temperature at each point in the cylinder is given by w(r, y, z) (30 z2)(2-(r2+ y2). determine the rate of heat flow across each horizontal disk given by z 1, z 2, and z 3, identifying which has the greatest rate of heat flow across it.

explanation: