Chemistry, 02.04.2021 17:20 steven122048i
The element Harrium has 3 isotopes. 82% of the isotopes are Harrium -12 . 10% are
Harrium -13 and 8% are Harrium -14. What is the average atomic mass of Harrium ?
The element Abbium has 2 isotopes. 56% of the isotopes are Abbium -5. 44% are Abbium -6. What is the average atomic mass of Abbium ?
The element Martinium has 2 isotopes. 32% of the isotopes are Martinium -77. 68% are Martinium -75. What is the average atomic mass of Martinium?
The element Annium has 2 isotopes. 71% of the isotopes are Annium -56. 29% are Annium -59. What is the average atomic mass of Annium ?
please show work
Answers: 2
Chemistry, 22.06.2019 05:30, jzjajsbdb8035
Which other elements contain the same number of outer electrons as sodium
Answers: 3
Chemistry, 22.06.2019 12:00, WinterStrikesBack
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?
Answers: 2
Chemistry, 22.06.2019 14:00, ashlynneboogs0056
8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.
Answers: 3
The element Harrium has 3 isotopes. 82% of the isotopes are Harrium -12 . 10% are
Harrium -13 and 8...
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