How are energy and mass connected during the formation of an atom?
energy is absorbed,...
Answers: 2
Chemistry, 22.06.2019 03:50
Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.
Answers: 1
Chemistry, 22.06.2019 20:00
Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.
Answers: 3
Chemistry, 23.06.2019 07:30
If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?
Answers: 1
Chemistry, 23.06.2019 09:30
Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.
Answers: 1
Mathematics, 18.05.2021 21:50
Mathematics, 18.05.2021 21:50
Mathematics, 18.05.2021 21:50
Mathematics, 18.05.2021 21:50
Mathematics, 18.05.2021 21:50
Mathematics, 18.05.2021 21:50
English, 18.05.2021 21:50
Mathematics, 18.05.2021 21:50
English, 18.05.2021 21:50
Mathematics, 18.05.2021 21:50