Chemistry, 24.11.2020 18:00 tylerbrewton23
7. A bag contains 6 red marbles and 4 blue marbles. A marble is drawn at
random and not replaced. Two further draws are made, again without
replacement. Find the probability of drawing:
a) three red marbles
b) three blue marbles
c) no red marbles
d) at least one red marble.
385 / 504
-Pl help me
Answers: 3
Chemistry, 22.06.2019 15:00
Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.
Answers: 2
Chemistry, 22.06.2019 15:30
Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)
Answers: 3
Chemistry, 22.06.2019 16:50
Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 1
Chemistry, 23.06.2019 06:30
Consider the heating curve of h2o and line segments a, b, and c. several changes are taking place at a, b, and c. all but one would be an appropriate description as e move through segments a, b and then c.
Answers: 3
7. A bag contains 6 red marbles and 4 blue marbles. A marble is drawn at
random and not replaced. T...
Mathematics, 14.01.2020 02:31
Mathematics, 14.01.2020 02:31
Computers and Technology, 14.01.2020 02:31
Biology, 14.01.2020 02:31
Spanish, 14.01.2020 02:31
History, 14.01.2020 02:31