Please help!! In the synthesis reaction below, calcium reacts with nitrogen gas to produce calcium
nitride. Choose ALL the true statements about this reaction:
3Ca+N2 → Ca3N2
Select 2 correct answer(s)
A)If you double the amount of nitrogen gas used in the reaction you will triple the amount of
calcium nitride produced.

B)The ratio of calcium to calcium nitride in the reaction is 3:1.

C)For every 1 mole of Ca3N2 you need 1 mole of nitrogen gas.

D)The ratio of calcium to calcium nitride in the reaction is 3:2

During which time interval does the object travel approximately 10 meters

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

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.