Explain how molecules can just be elements or compounds

A student buys a rope at the store the label on the packaging says that the Rope is 2.15 m in length the student measures the robe as 1.85 M what is the students percent error?

When you use the terms heavier or lighter to compare different objects with the same volume, what property of the objects are you usually comparing?

When 28 g of nitrogen and 6 g of hydrogen react, 34 g of ammonia are produced. If 100 g of nitrogen react with 6 g of hydrogen, how much ammonia will be produced? 106 g 34 g 128 g 40 g

A toxin producing gene is inserted into a crop of corn to be used as a pesticide. Describe both a positive and negative result that could occur. Justify your results in two or more complete sentences.

Be sure to answer all parts. A concentration cell consists of two Sn/Sn2 + half-cells. The electrolyte in compartment A is 0.23 M Sn (NO3) 2. The electrolyte in B is 0.87 M Sn (NO3) 2.

Which of the following is a precipitation reaction? a. 2 LiI (aq) + Hg2 (NO3) 2 (aq) →Hg2I2 (s) + 2 LiNO3 (aq) b. NaCl (aq) + LiI (aq) → NaI (aq) + LiCl (aq) c. HCl (aq) + KOH (aq) → KCl (aq) + H2O (l) d.

How many outmost electrons do lithium and potassium have

Which of the following is a heterogeneous mixture Air Salt water Steel Soil I think it's soil but I'm not positive

When 40.5 g of Al and 212.7 g of Cl2 combine in the reaction: 2 Al (s) + 3 Cl2 (g) - -> 2 AlCl3 (s) b) How many moles of AlCl3 are formed?

Which factor does not influence the rate of a chemical reaction? A. the concentration of reactants B. the surface area of reactants C. the presence of a catalyst D. the volume of the container in which the reaction occurs