Answer:
C)
Explanation:
M1V1 = M2V2
40.0ml*0.25M = M2*50.0ml
M2 = 40.0*0.25/50.0 = 0.20 M
Copper sulfate<span> is an inorganic compound that combines sulfur with </span>copper<span>. It can kill bacteria, algae, roots, plants, snails, and fungi. The toxicity of </span>copper sulfate<span> depends on the </span>copper<span> content. </span>Copper<span> is an essential mineral.</span>
The answer would be: <span>D. Kb for HS–
</span>
Kb is the dissociation constant of an acid/base molecule. The word b in Kb is base, which means the formula should have an OH- ion inside it. Ka would be the opposite of Kb where the formula has H+ ion.
In this question, the formula is: [H2S][OH-]/ [HS-]
Since there are OH- ion. Since H2S is acid and HS- is base, I think it should be <span>Kb for HS–
</span>
Answer: the second one " the seasons are caused by the tilt of earth's axis and how much solar radiation each area of earth receives. "
Explanation:
i took the test on k12.
A 3 sig figs
B 6 sig figs
C 2 sig figs
D 5 sig figs
C, A, D, B