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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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Why do oxygen have a strong attractive force for electrons
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When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle if the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3 2 kilopascals, what is the partial pressure of the hydrogen?
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Asample of calcium chloride (cacla) contains 100.2 grams of calcium (ca) and 177.3 grams of chlorine (co. what is the percent composition of chlorine 2.510% 36.10% 56.50% 63.89%
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Given the following equation: 2 K + Cl2 ---> 2 KCl
How many moles of KCl are produced from 6.50...
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