Answers: 1
Chemistry, 21.06.2019 23:00
A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?
Answers: 1
Chemistry, 22.06.2019 08:00
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
Chemistry, 22.06.2019 08:30
What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots
Answers: 3
Chemistry, 22.06.2019 19:00
A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.
Answers: 1
What does aluminum hydroxide and calcium sulfate produce...
Mathematics, 29.04.2021 07:20
English, 29.04.2021 07:20
Mathematics, 29.04.2021 07:20
English, 29.04.2021 07:20
Mathematics, 29.04.2021 07:20
Computers and Technology, 29.04.2021 07:20
Mathematics, 29.04.2021 07:20
Mathematics, 29.04.2021 07:20
Arts, 29.04.2021 07:20
Mathematics, 29.04.2021 07:20
Health, 29.04.2021 07:20
Mathematics, 29.04.2021 07:20
Mathematics, 29.04.2021 07:20