subject
Chemistry, 04.02.2020 12:51 lordcaos066

What is the only way to confirm a chemical change has taken place


What is the only way to confirm a chemical change has taken place

ansver
Answers: 1

Another question on Chemistry

question
Chemistry, 21.06.2019 21:30
Which substances have the lowest melting points: ionic covalent, or metallic
Answers: 1
question
Chemistry, 22.06.2019 01:20
1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.
Answers: 2
question
Chemistry, 22.06.2019 11:30
Define a is a tiny pavket of energy
Answers: 1
question
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
You know the right answer?
What is the only way to confirm a chemical change has taken place
...
Questions
question
Mathematics, 05.05.2021 17:20
question
Mathematics, 05.05.2021 17:20
question
Geography, 05.05.2021 17:20
question
Social Studies, 05.05.2021 17:20
question
Mathematics, 05.05.2021 17:20
Questions on the website: 13722367