What volume of 10 M HCl would you need to make 1000 mL of 0.50 M HCl?

can you attach a picture of the lettuce? : )

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.