45.0g of butane (C4H10) are burned under a calorimeter containing 100.Og of H2O. The temperature of the water increases from 15.0°C to 75.0°C. What is the heat of
combustion of butane in KJ/mol?
32.4 KJ/mol
11.2 KJ/mol
19.4 KJ/mol
25.1 KJ/mol

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

gas

explanation:

smoke is the matter of a gas

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8