Which of the following is a mixture?
A) cough syrup
B) iron
C) helium
D) sodium hydrogen carbonate
E) steam
Correct Answer:
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Q25: The formula for ammonia, Q26: What is the symbol for tungsten? Q27: Which of the following is an element? Q28: What is the chemical symbol for calcium? Q29: Which of the following can be classified Q31: Which symbol does not denote a compound? Q32: A reddish powder is heated gently in Q33: Xylene,a compound with the formula C8H10,is composed Q34: A pure substance Q35: The most common element by mass percent
A)W
B)Tu
C)Sn
D)St
E)Ti
A)fire
B)iron
C)salt
D)water
E)wine
A)C
B)Ca
C)Cl
D)Cr
E)Cu
A)
A)always has the same elemental
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