Well I have no clue on what your class is doing but to me, it looks like B. the dependent variable also increases
Answer:
the value of molar absorptivity is 229000
Explanation:
given data
phenol phthalein solution = 0.050 g
total volume = 100.0 ml
dilute = 100.0 ml
diluted sample = 0.18
solution
we get here concentration that is express as
concentration = ( mass of solute × 1000 ) ÷ ( molar mass of solute × volume of solution ) .............1
put here value
concentration =
concentration = 0.00157 M
and here dillution equation is express as
c1 × v1 = c2 × v2 .................2
here c1 and c2 is initial and final concentration
and v1 and v2 is initial and final volume
put here value
0.001571 × 0.050 = c2 × 100
c2 = 7.855 × M
and
now we get molar by absorbance equation that is
A = E × C × l ................3
here A is absorbance and E is molar and c is absorptivity and l is path length
put here value
0.18 = E × 7.855 × × 1
E = 229000
Answer:
A substance that produces hydrogen gas when dissolved
To be able to solve this problem, we must be given the
balanced chemical equation:
3A + 5B + 1C ---> 2D + 1E
Our reactant A is called the limiting reactant because it
is limited in amount which is only 6 moles. So we based our calculation on that
reactant alone.
From stoichiometry, we have 1 mole of E for every 3 moles
of A, therefore:
moles E = 6 moles A * (1 mole E / 3 moles A)
moles E = 2 moles