A sample of hydrated copper sulfate weighs 25g. After heating to remove the water of crystallization, the anhydrous copper sulfate weighs 16g. What is the percentage of water of crystallization in the original sample?
16%
25%
36%
56%
Related Questions
A sample of hydrated copper sulfate weighs 25g. After heating to remove the water of crystallization, the anhydrous copper sulfate weighs 16g. What is the percentage of water of crystallization in the original sample?
16%
25%
36%
56%
A mixture of and weighing 1.12 g is treated with an excess of red hot . The is converted to . The total weight of produced is 1.6 g. What was the weight percentage of in the original mixture?
42.86%
57.14%
28.57%
71.43%
Which law explains why 18g of water always decomposes into 2g of hydrogen and 16g of oxygen?
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Avogadro's Law
Which of the following postulates of Dalton's atomic theory explains the Law of Conservation of Mass?
Atoms of different elements have different masses.
Atoms are indivisible particles.
Atoms combine in simple whole number ratios to form compounds.
Atoms are neither created nor destroyed during a chemical reaction.
Which of the following experiments definitively proved the Law of Conservation of Mass?
Dalton's atomic theory
Gay-Lussac's law of combining volumes
Lavoisier's experiments on heating mercury in a sealed container
Proust's law of definite proportions
Which of the following reactions is not correct according to law of conservation of mass
Hydrogen and oxygen combine to form water (H2O). If 4g of hydrogen reacts completely with oxygen to form water, what mass of oxygen is required?
8g
16g
32g
64g
