13. Hydrogen and helium have both been used to fill balloons. Which property of helium

makes it the preferred choice to hydrogen?

What best describes the dip in salinity centered at 400 meters along the shore

A student forgot to read the label on the jar carefully and put potassium chloride in the crucible instead of potassium chlorate. how would the results turn out

Does a mirror breaks up light into all the colors of the rainbow

When the argon and fluorine reach the same temperature they are both liquid. For the physical system of argon and fluorine what energy systems change from when you add the fluorine to when the temperatures equilibrate?

A vial contains radioactive iodine-131 with an activity of 2.0 mCi/mL. If a thyroid test requires 2.9 mCi in an "atomic cocktail," how many milliliters are used to prepare the iodine-131 solution?

How many moles of FeO are produced if 8 moles of CuFeS, are consumed?

Will mark as Brainliest. How much energy is released when 16.5 g of steam is condensed at 100 degrees Celsius? -37290 J -3729 J -136 J -136 kJ

What is the mole fraction, x, of solute and the molality for an aqueous solution that is 16.0 % NaOH by mass

What is the square root of 54554? What is the square root of 35654?

Halogens have ... Electron affinity