Three signs that a chemical change has taken place is 1) color change 2) formation of gas bubbles 3) a change in temperature ( if you have ever bleached your hair the reason why it is warm to the touch is because of a chemical reaction)
It is an alpha decay because when this phenomena occurs an atomic nucleus emits an alpha particle (helium nucleus) and consequentially decays into another atom with a mass number that is reduced by four an atomic number that is reduced by 2 two. The helium atom consists of two protons and two neutrons.
Therefore, the answer is <span>alpha decay because alpha particles have two protons and two neutrons</span>
Yo sup??
The answer to your question is option c ie
c.9
the rest 12 are under non essential as they are produced by our body itself
Hope this helps.
Main Answer:
Given data:
Mass of ice m = 12 grams = 12/1000 = 0.012 kg
Specific heat s = 4.18 KJ/ gm-1 C-1
Change in temperature t = t2 - t1
t = 100 - (-10)
t = 100 + 10 = 110C
Heat required Q = m x s x t
Q = 0.012 x 4.18 x 110
Q = 5.5176 KJ
Explanation:
What is heat?
Heat is defined as one of the forms of energy. It is a kinetic energy which can be transferred from one object to another object or medium. It cannot be destroyed or created. The units of heat is Joules in SI system and calories in CGS system.
To know more about heat, please visit:
brainly.com/question/13439286
#SPJ4
