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A Potassium isotope contains 19 protons, 19 electrons and 21 neutrons. What is its mass number? 40
Answers: 2
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Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?
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As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.
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Chemistry, 23.06.2019 10:30
Identify the limiting reactant when 9.65-g h2so4 reacts with 6.10-g of naoh.the equation is h2s04 + 2naoh = 2h2o + na2so4• what is the theoretical yield of na2so4, in grams? • how much of the excess reagent will remain after the reaction has been completed? • if 10.5-g of na2so4 are actually recovered experimentally, what is the percent yield?
Answers: 3
A Potassium isotope contains 19 protons, 19 electrons and 21 neutrons. What is its mass number? 40...
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