When you strike a match, what do you provide that enables the flame to appear?

a. catalyst

b. reactant

c. product

d. activation energy

e. activated complex

Which statement below describes the relationship of sunlight to becquerel's discovery if radiation

Water change of state involves a release of energy

How many protons does neon 12 have

What did two scientist discover by accident using L-band microwaves

If 15.0 g CO2 (mm = 44.01 g/mol) has a volume of 0.30L at 27oC, what is the pressure in atm? Group of answer choices 27.97 atm 1230.9 atm 2.52 atm 325.0 atm

What is the main difference between a longitudinal wave and a transverse wave?

How many moles of methane (CH4) are in 7.31*10/25 molecules

What starting matirials do cells need for cellular respiration

What is the velocity of a wave with a frequency of 77 Hz and a wavelength of 200 m?

For the reaction: n2 (g) + 3h2 (g) ⇔ 2nh3 (g), at a particular temperature, the concentrations of n2, h2 and nh3 are 2.1 x 10-3 m, 3.2 x 10-2 m, and 1.8 x 10-1 m, respectively. calculate a value of k for this reaction