10.Sınıf Kimya Popquiz-1 (Kütlenin Korunumu-Sabit Oranlar)

1. Equal masses of Mg solid and Cl₂ gas reacted. At the end of the reaction, 95 g of MgCl₂ solid is formed and 47 g of Mg solid remains unreacted. According to this information, which of the following is true?

I. The initial solid mass is 24 g.

II. The solid mass at the end of the reaction is 95 g.

III. The initial gas mass is 71 g.

• Only I

• Only III

• I and III

• II and III

• I, II and III

2. When oxygen and carbon are reacted together, carbon monoxide is formed. The combining mass ratio of carbon to oxygen is 3/4. In an experiment, it is found that 0,9 g of carbon reacts with 2 g oxygen to form carbon monoxide.

a) How many grams of carbon monoxide is produced?

2. When oxygen and carbon are reacted together, carbon monoxide is formed. The combining mass ratio of carbon to oxygen is 3/4. In an experiment, it is found that 0,9 g of carbon reacts with 2 g oxygen to form carbon monoxide.

b) Which reactant will be left over and how many grams?

3. Elements X and Y are reacted to form the compound XY₂. Considering the graph given;

a) What is the combining mass ratio of X to Y?

3. Elements X and Y are reacted to form the compound XY₂. Considering the graph given;

b) How many grams of X must be used to produce 75 g of XY₂?

3. Elements X and Y are reacted to form the compound XY₂. Considering the graph given;

c) How many grams of Y must be used to produce 75 g of XY₂?

3. Elements X and Y are reacted to form the compound XY₂. Considering the graph given;

d) What is the mass percentage of Y in the compound?