11. Which is a compound? steel a. b. water 12. If the volume of a substance is 98.2 cc and it has a mass 56.12 grams, it should have a density of a. 570 571.5 b. 572 Answer is not among the choices C. d. a. 20.3 b. 60.1 15. CH4 is the C. d. 13. When the electronegativities of two atoms are about the same, a. Ionic bonds b. Non-polar covalent bonds formula for methane. oxygen Both a and b result/s. C. Polar covelent bonds d. Both a and b 14. 80.45 g of charcoal was combined with 160.18 g of oxygen to produce ash and gases. How much ash, in grams, were left if 220.3 g of gases were produced? C. d. — 79.7 Answer is not among the choices kg/m³.

Chapter 4 Worksheet Answer the following questions. Be sure to check your spelling. In ionic compounds, positively charged a. metals, anions b. nonmetals, cations c. metals, polyatomic ions d. nonmetals, anions e. metals, cations A) lose their valence electrons to become An ionic compound a. has a net positive charge. b. has a net negative charge. c. contains only cations. d. contains only anions. e. has a net charge of zero. 3) Which of the following compounds contains an ionic bond? a. NH3 b. H2О с. СаО d. H2 A group of covalently bonded atoms that has an overall electrical charge is called a(n) a. ionic compound. b. anion c. polyatomic ion. d. cation. e. molecule. In a molecule with covalent bonding, a. oppositely charged ions are held together by strong electrical attractions. b. atoms of metals form bonds to atoms of nonmetals. c. atoms of different metals form bonds. d. atoms are held together by sharing electrons. 10

pleasssssse solve question 12

Predict the formula of the compound that would form between each.a. potassium and fluorine b. Ti4+ and CO32-