Chemistry, 22.08.2019 23:30, isaicruz2018
If a chemical change requires energy, which of the following could be the source of the energy?
a. heating with a flame
b. settling the mixture for 20 minutes
c. measuring mass from a balance beam
d. adding more substance to the observed material
Answers: 1
Chemistry, 22.06.2019 07:30, 10040813
The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
Answers: 3
Chemistry, 23.06.2019 10:30, cjtambasco
In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 3.75 mol fe and 8.70 mol nio(oh) react?
Answers: 1
Chemistry, 23.06.2019 15:00, maariaaa10
An isotope undergoes radioactive decay by emitting radiation that has no mass. what other characteristic does the radiation have?
Answers: 3
If a chemical change requires energy, which of the following could be the source of the energy?
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