Deshawn is conducting an experiment about fermentation. He prepares six bottles. The table shows what he puts in each bottle. bottle 1 1 cup cold water, 1 packet yeast bottle 2 1 cup cold water, 1 packet yeast, 2 tablespoons sugar bottle 3 1 cup lukewarm water, 1 packet yeast bottle 4 1 cup lukewarm water, 1 packet yeast, 2 tablespoons sugar bottle 5 1 cup hot water, 1 packet yeast bottle 6 1 cup hot water, 1 packet yeast, 2 tablespoons sugar He swirls the bottles until the yeast dissolves and puts a balloon over the neck of each bottle. In 20 minutes, he will check and see what has happened. 6 bottles with balloons stretched over the mouths, balloons are not inflated Part A What question is being asked through this scientific investigation?

Different isotopes indicate that an element will have different numbers of

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

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation