Chemistry, 18.09.2019 03:50 unkownperson030
Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n) .
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Chemistry, 22.06.2019 02:40
Consider the nuclear equation below. 239/94 puโ-> x+ 4/2 he. what is x?
Answers: 2
Chemistry, 22.06.2019 04:20
Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 ร molar mass of n + molar mass of h molar mass of n + 3 ร molar mass of h 3 ร molar mass of n + 3 ร molar mass of h
Answers: 1
Chemistry, 22.06.2019 07:00
Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li
Answers: 1
Chemistry, 22.06.2019 20:00
Phosphoric acid is a triprotic acid ( =6.9ร10โ3 , =6.2ร10โ8 , and =4.8ร10โ13 ). to find the ph of a buffer composed of h2poโ4(aq) and hpo2โ4(aq) , which p value should be used in the hendersonโhasselbalch 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
Arock can be broken down into different kinds of substances by physical processes. no chemical react...
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