Boron occurs naturally as two isotopes. what is the difference between these isotopes?
a)the...
Chemistry, 22.08.2019 13:50 mariahisawsome1
Boron occurs naturally as two isotopes. what is the difference between these isotopes?
a)they have different numbers of electrons and different charges.
b)they have different numbers of neutrons and different charges.
c)they have different numbers of protons and different mass numbers.
d)they have different numbers of neutrons and different mass numbers.
Answers: 2
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Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.
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In a copper wire, a temperature increase is the result of which of the following
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Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]
Answers: 1
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