On Earth, Element X forms ions with multiple charges. Element X forms the compound X₂CO₃. What would be the charge of Element X? *

At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k

Which metal exist in liquid state and can be cut with knife ?

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.