Determine how many grams of one of the chemicals that you investigated in the experiment are required to achieve the following temperature: hot pack, 55° C (131° F) The chemical in question is Na2CO3. The other substance in a hot pack would be water. How do I calculate the amount of Na2CO3 that is needed to heat water up to 55° C?

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

How do limiting factors most affect population size? ostop population growthrestrict population growthincrease population sizeresult in positive impactso