Chemistry, 18.07.2019 14:00 blessing5266
Which of the following is the best definition of a mixture? combination of more than one kind of substance two elements chemically bonded two elements of different types forming either an ionic or covalent bond solubility is the same for all substances, regardless of what they are made of. true false water can dissolve many substances because it has an overall negative charge, allowing it to attack positively-charged ions. true false
Answers: 1
Chemistry, 21.06.2019 20:40
Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o
Answers: 1
Chemistry, 22.06.2019 18:10
Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)
Answers: 1
Chemistry, 22.06.2019 22:00
Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.
Answers: 3
Chemistry, 22.06.2019 23:00
What prefix multiplier is appropriate for reporting a measurement of 5.57 ×10−5 m?
Answers: 1
Which of the following is the best definition of a mixture? combination of more than one kind of su...
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