When 5.0 mol al react with 13 mol hcl, what is the limiting reactant, and how many moles of alcl3 can be formed? 2 al + 6hcl → 2 alcl3 + 3 h2 a. al is the limiting reactant, 5.0 mol alcl3 can be formed b. hcl is the limiting reactant, 4.3 mol alcl3 can be formed c. al is the limiting reactant, 7.5 mol alcl3 can be formed d. hcl is the limiting reactant, 6.5 mol alcl3 can be formed

Define a is a tiny pavket of energy

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.