2a list of techniques used to separate mixtures is given below.
fractional
distillation
simple
distillation crystallization filtration diffusion
from the list choose the most suitable technique to separate the following.
water from aqueous copper(ii)
helium from a mixture of helium and
copper(ii) sulphate from aqueous copper(ii)
ethanol from aqueous
barium sulphate from a mixture of water and barium

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

What does x represent in the formula for the compound xcl4?

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.