2. Which of the following is not a result from an experiment? A. Mass of sodium

Question

2.        Which of the following is not a result from an experiment?

  A.        Mass of sodium chloride was 4.5 g   

            B.         The temperature of the metal was 60 °C    

            C.         Acetone dissolves in water because both substances are polar.    

            D.        Copper ions in solution are blue

3.         The chemical label below indicates the safety hazards for 100% ethanol. Which of the following statement  regarding the indicated hazards are not true?

            A.        The GHS for flammability is a fire

            B.         blue in the NFPA symbol is health hazards

            C.         Yellow in the NFPA symbol is corrosion

            D.        Red in the NFPA symbol is flammability

17.       How many of the following salts would not form a precipitate in an aqueous solution?

A.       one

B.        two

C.         three

D.        four

Explanation / Answer

2) C.        Acetone dissolves in water because both substances are polar.   

3) A.        The GHS for flammability is a fire

4) A.       one  

CaCl2 + H2O ----------> Ca(OH)2 (soluble) + 2HCl(aq)

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.