How many moles of platinum, Pt is in a sample of 1 kg? show your work.

Answer =5 mole

Explanation:

Number of moles =mass ÷ molar mass molar mass of platinum = atomic mass unit of platinum =195.084 number of moles = 1000÷ 195.084 =5.125 mol = 5 Mol

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.