Answer:
1.53x10^22 atoms of Au
Explanation:
To find the atoms of gold we need first, to convert the mass of gold to moles using molar mass of gold (196.97g/mol). Then, these moles must be converted to number of atoms based on definition of moles (1 mole = 6.022x10²³ atoms).
<em>Moles Au:</em>
5.00g Au * (1mol / 196.97g) = 0.0254 moles of Au
<em>Atoms of Au:</em>
0.0254 moles * (6.022x10²³ atoms / 1 mole) =
<h3>1.53x10^22 atoms of Au</h3>
There are 3 significant figures in 20600.
<span>The earths plates move by 'Ridge-Push' and 'Slab Pull'. At constructive plates margins, lava is extruded and new crust forms as the convection pushes the hot magma though and the slab pull is where the dense subducted plate pulls the rest of the plate along. That is the very basics of what happens.
Lamp A - Off - The lava is cold, and therefore does not flow or convect.
Lamp B - On - The lava at the bottom by the light is being heated, as it heats, it gets less dense and rises to the top. When at the top,it cools down, and gets more dense and then falls back to the bottom again. Convection.
The heat source of the lava lamp is the light giving heat energy. The heat source in the earth is the core, and the radioactive processes (Mainly radioactive decay) that occurs within it.
The lava in the lamp represents the earths mantle. The floating pieces are trying to be the earths crustal plates, and they would move over the lava (earths mantle) due to the convection.</span>
<span>what volume of ammonia must you measure?
1.50 moles NH3 ( 22.4 L / 1 mole ) = 33.6 L NH3 should be measured
</span><span>how many molecules of nacl are in 23.40 grams nacl
23.40 g NaCl ( 1 mol / 58.44 g) (6.022 x 10^23 molecules / 1 mol ) = 2.4113 x 10^23 molecules
Hope these answer the questions. Have a nice day.</span>
The number 90 has 1 sig fig.