ASSIGNMENT-2 Magnesium carbonate, MgCo, is a tablet used to relieve symptoms of overproduction of gastric acid in the stomach. Gastric acid contains hydrochloric acid. 100 cm of 0.155 mol/dm of hydrochloric acid is neutralised by the tablet. The balanced equation for the reaction between MgCo, and HCl is: MgCo, + 2HCI MgCl, + H2O + CO2 3 a) Convert 100 cm to dm. 1000 cm3 FOOO o.1 dm3 am3 [1] . b) Calculate the number of moles in 0.155 mol/dm3 of HCl

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

it's filtration, but this is an assumption so my apologies if i got this

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.