What is the percent composition by mass of nitrogen in the compound n2h4

What technology was revolutionized by spatial analysis and cartography? a. the abacus b. the satellite c. the telescope d. Geographic Information System

What is a material's ability to combine chemically with other materials?

Sam's father bought Sam a goldfish and a fish bowl. What must Sam put in the fish bowl so that the goldfish will survive? A. water B. plants C. sand D. air

Why does Caesium have the largest atomic radius?

Give me an example of pedegriee

Which of the following is true about lonization? The ionic substances donate some of their atoms to the solvent. The covalent substance breaks apart into ions. The ionic substance breaks apart into ions.

Potassium iodide reacts with lead (II) nitrate in this precipitation reaction: 2 KI (aq) + Pb (NO3) 2 (aq) → 2 KNO3 (aq) + PbI2 (s) What minimum volume of 0.200 M potassium iodide solution is required to completely precipitate all of the lead in 155.

Which of the following best describes the valence electrons in a polar covalent bond? O A. The electrons are transferred to the atom with the higher electronegativity. B. The electrons are closer to the atom with the lower electronegativity. C.

Humans are protected from some infections by specialized cells which produce chemicals that

Describe the density of cold water with a high salinity compared to that of warm water with low salinity. Explain your reasoning