Which law explains the observation that 1g of hydrogen always combines with 8g of oxygen to form 9g of water?
Law of Conservation of Mass
Law of Multiple Proportions
Law of Definite Proportions
Gay-Lussac's Law
Related Questions
Iron filings are added to a solution of copper sulfate. Which observation indicates a metal displacement reaction has occurred?
Gas bubbles are produced.
The temperature of the solution decreases.
The blue solution fades and a reddish-brown solid deposits.
The solution becomes more intensely blue.
Two elements X and Y combine to form two compounds and . If 0.05 moles of weighs 5 g and 0.10 moles of weighs 20 g, find the atomic masses of X and Y.
X = 40, Y = 30
X = 50, Y = 25
X = 60, Y = 20
Cannot be determined from the given data
Which of the following reactions is not correct according to law of conservation of mass
Which of the following reactions is the metal displacement reaction? Choose the right option.
10 g of a metal oxide on strong heating gave 6.4 g of metal. If the formula of the metal oxide is , what is the atomic mass of the metal M?
56
43
27
65
If two elements A and B combine in different ratios to form two compounds, the masses of B that combine with a fixed mass of A are in a small whole number ratio. This is a statement of:
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Avogadro's Law
Which metal, among Mg, Cu, Ag, and Au, would effectively displace copper from a copper sulfate solution?
Mg
Cu
Ag
Au
When a solid vaporizes directly without melting, it is known as:
Evaporation
Sublimation
Sedimentation
Saponification
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%
