Potassium reacts with chlorine to produce the ionic compound potassium chloride: 2K(s)+Cl2(g)→2KCl(
Potassium reacts with chlorine to produce the ionic compound potassium chloride:
2K(s)+Cl2(g)→2KCl(s)
Potassium reacts with chlorine to produce the ionic compound potassium chloride:
2K(s)+Cl2(g)→2KCl(s)
Calculate the solubility of A2X3in pure water, assuming that neither kind of ion reacts with water. For A2X3,.
What is the major reason why some doctors give patients potassium chloride?
A.It is used as medicine.
B.It contains no sodium.
C.It makes food tasty.
D.Human body can easily absorb potassium chloride.
When were the chemicals first used in America?
A.Before the American Revolution.
B.Over thirty years ago.
C.Over two hundred years ago.
D.Before the discovery of potassium nitrate.
Chlorine gas can be prepared by adding dilute HCl(aq) dropwise onto potassium permanganate crystals,KMnO4. The KMnO4is reduced to Mn2+(aq). What volume (in liters) of 1.50mol·L-1HCl(aq) is required to react with 12.0g KMnO4?
A heart-healthy diet is one that contains______.
A.a low level of sodium.
B.a lot of potassium and calcium.
C.no salt at all.
D.both A and B
Animals can strengthen their immune system in preparation for winter because ______.
A.when season changes, the central nervous system reacts to environment and that sparks changes in the body's immune system
B.animals have shorter exposure to light in winter than in summer
C.animals have evolved to select the best time to breed and be able to predict the change of conditions
D.all of the above
Which of the following is the main topic of the passage?
A.The difference between sodium chloride and potassium chloride.
B.The function of slat in daily life.
C.A comparative study of slat consumption habits in some countries.
D.The relationship between salt consumption and high blood pressure.
The story was published wit h the sole purpose of selling newspapers.
A. real
B. main
C. only
D. practical