Which one of the following chemical equations is balanced? a. nh3 + h2o → 2nh4oh b. 2nacl + h2so4 → hcl + naso4 c. koh + h2 so4 → khso4 + h2o d. 2na + s → 2nas

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above