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Q19: In all chemical reactions,the reactants are always
Q23: What is the formula of magnesium sulfide?<br>A)Mg<sub>2</sub>S<br>B)MgS<sub>2</sub><br>C)MgS<br>D)Mg<sub>3</sub>S
Q29: Which of the following contains the greatest
Q35: How many chloride ions are present in
Q40: Which of the following combinations will result
Q44: Water is a chemical element.
Q46: When chemical reactions occur,energy is always released.
Q46: Sulfur dioxide reacts with oxygen to produce
Q71: What is the maximum number of electrons
Q85: Which element is in the s-block of