Which of these liquids is the least acidic? 1 mark
(b) Emilio cooked an egg until it was hard-boiled.
He put the egg in a beaker of dilute hydrochloric acid as shown.
оо
dilute
hydrochloric
acid
bubbles
of gas
O
ООО
O
egg
D
0
(0)
The egg shell reacted completely with the acid.
After two days the pH of the liquid in the beaker was 2.5.
How did the acidity of the liquid in the beaker change?
Use the table above to help you.
1 mark

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Why is the bottom layer of a trophic pyrimid the