What is the weighted-average mass of all known isotopes for an element

The first element on the periodic table of elements is carbon. a. true b. false

Will mark brainliest26. which of these statements are true? (3 points)a. gases are compressibleb. gases fill their containers completelyc. the pressure of a gas is independent of the temperatured. gases have masse. gases exert pressuref. the pressure of a gas is dependent on the volumeg. gas pressure results from the collisions between gas particlesh. gases have a definite volume and shape

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar