Chemistry, 01.08.2019 20:30 tiniecisneros28
Calculate the atomic mass for zinc given the following data for its natural isotopes: 64zn 63.929 amu 48.89 % 66zn 65.926 amu 27.81 % 67zn 66.927 amu 4.11 % 68zn 67.925 amu 18.57 % 70zn 69.925 amu 0.62 %
Answers: 1
Chemistry, 22.06.2019 03:00
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Chemistry, 22.06.2019 12:40
When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign
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Chemistry, 22.06.2019 17:00
Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.
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Chemistry, 22.06.2019 23:10
Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium.b)heavier than helium.c)the same weight as helium.d)dependent on the element that reacted with carbon.
Answers: 3
Calculate the atomic mass for zinc given the following data for its natural isotopes: 64zn 63.929...
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