Erbium (Er) is element 68 on the periodic table. A sample contains 5.04*1023 atoms of Er. Calculate the amount of Er.

A 0.25 m solution of the sugar sucrose (c12h22o11) in water is tested for conductivity using the type of apparatus shown. Bulb wires solution being tested plugged into wall outlet what do you predict will happen? 1.

How are independent and dependent variables related?

Correct the name to match the formula of the following compounds: (a) calcium (ll) dichloride. CaClZ; (b) copper (|l) oxide. Cu20; (c) stannous tetrafluoride. SnF4; (d) hydrogen chloride acid, HCL

The plastic which do not remould against on the heating are called ___ ...

Which Two parts of the earth make up the lithosphere Crust and outer part of the mantle Inner core and mantle inner core and outer core Mantle And Outer core

What would happen if you tried to sqeeze a gas into a smaller container?

Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate

A 10 chunk of metal has a specific heat of 0.25 J/g ºC. The temperature is changed from 10ºC to 45ºC. How much heat is required?

In this reaction what is the correct coefficient for sodium chloride? pb (no3) 2? nacl → pbcl2? nano3

Classify each of the following as a path function or a state function. work energy distance traveled enthalpy heat