ÔN TẬP CUỐI KÌ 2

When the same amount of H2SO4 solution is added to two cups containing equal mass of CaCO3. In the cup with finely ground CaCO3, gas escapes faster and stronger than in the cup with block CaCO3. What factor affects the reaction rate in the two experiments?

The coefficient of HNO3 in the equation: Al + HNO3 -> Al(NO3)3 + N2O + H2O is...

In the halogen group, the element with the strongest oxidizing ability is...

In the periodic table of chemical elements, halogens belong to group...

Making salt is a common profession in many coastal areas of Vietnam. A family conducts salt making on a salt field containing 200,000 liters of seawater. Assuming 1 liter of seawater contains 30 g of NaCl and the yield of the salt making process is 80%. How much salt does the family obtain in tons?

The electron configuration of the outermost shell of halogen elements is...

When the temperature of a chemical reaction is increased by 40 degrees, the reaction rate increases by 81 times. What is the Van't Hoff temperature coefficient of the above reaction?

For the thermochemical equation of the reaction: 2H2(g) + O2(g) -> 2H2O(l) = -571.68 kJ. The above reaction is...

• A. No energy change.

• B. Absorbing heat from the surrounding environment.

• C. Exothermic.

• D. Endothermic.

Halogen that exists in liquid form under normal conditions is...

The highest oxidation number that chlorine can exhibit in compounds is...