Chemistry, 02.11.2020 14:50 khikhi1705

Tan45+tan30/ 1- tan45.tan30 is equivalent to a) tan90
b)sin45/cos30
c)tan75
d)tan15
can you explain the solution thanks

Answers: 3

Show answers

Another question on Chemistry

Chemistry, 21.06.2019 19:00

Does the temperature affect the solubility of sugar and salt in water? if it does tell me like different temperatures with different solubilities so i can sketch down a graph

Answers: 2

Answer

Chemistry, 21.06.2019 21:30

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

Answers: 1

Answer

Chemistry, 22.06.2019 12:00

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Answers: 1

Answer

Chemistry, 22.06.2019 18:00

Answer asap need to be answered 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: 3

Answer

You know the right answer?

Tan45+tan30/ 1- tan45.tan30 is equivalent to a) tan90
b)sin45/cos30
c)tan75
d)tan15<...

Questions