A student weighs a piece of metal and finds that it is 4.4 g. The student then holds this piece of metal with tongs and heats it using the flame of a Bunsen burner. After the final product is cooled, it is weighed and found to have a mass of 5.0g. Which of the following statements related to the experiment is correct? A. The mass of the metal decreased due to the physical processes of melting/ boiling
B. The metal increased in temperature only and neither a physical or chemical change occurred.
C. The mass of the metal increased when it went through a chemical change as bonds formed between the metal and another substance.
D. The metal was only heated and was unable to react with any substance so a physical change occurred.

What semimetal can form four single covalent bonds.

What overall charge must all compounds have

Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback