Spring water
River water
Tap water
Sea water
Correct answer is C
Tap water contains less Ca\(^{2+}\) and Mg\(^{2+}\)
146C → X + B X in the equation above represents...
The spontaneity of a chemical reaction is determined by the change in the ...
Which of the following statements about nuclear reaction is correct? The reaction ...
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The pH of four solutions W, X, Y, Z are 4, 6, 8, 10 respectively, therefore ...
The by-product of the fermentation of sugar to ethanol is ...
The number of electrons in the valence shell of an element of atomic number 14 is? ...