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Atomic Theory

Q. Two samples of calcium fluoride are decomposed into their constituent elements. The first sample produced 0.154 g of calcium and 0.146 g of fluorine. If the second sample produced 294 mg of fluorine, how many g of calcium were formed?

Solved • Jul 15, 2019

Atomic Theory

Q. A 5.69 g mixture contains both lithium fluoride, LiF, and potassium fluoride, KF. If the mixture contains 3.55 g fluorine, what is the mass of the KF in the mixture?

Solved • May 27, 2019

Atomic Theory

Q. How many hydrogen atoms are present in one NH3 molecule?

Solved • Apr 29, 2019

Atomic Theory

Q. The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride produced 24.5 g of sodium upon decomposition. How much fluorine (in grams) was formed?

Solved • Mar 16, 2019