Kevin had a blue crystal of an unidentified substance. He thinks it is an ionic compound, but he wants to be sure. What are 3 characteristics that Kevin could look for to determine that it is an ionic compound? +​

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b. slope c. benchmark d. index contour

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.