It is scandium or titanium iron chroniclemium vanadium manganese
Out of the choices given, the answer which refers to a chemical property is going to be B. Water will not burn, but gasoline is flammable. The reason why is because burning and flammability are both chemical properties.
The mass of the piece of lead is calculated using the below formula
Q(heat)= mC delta T
Q = 78.0 j
M=mass =?
C=specific heat capacity ( 0.130 j/g/c
delat T=change in temperature = 9.0 c
by making M the subject of the formula
M = Q/ c delta T
M= 78.0 j/ 0.130 j/g/c x 9.0 c = 66.7 g of lead
Answer:
a) find attached image 1
b) find attached image 2
Explanation :
The more stable radical is formed by a reaction with smaller bond dissociation energy.
since the bond dissociation for cleavage of the bond to form primary free radical is higher, more energy must be added to form it. This makes primary free radical higher in energy and therefore less stable than secondary free radical.
Answer:
67.88% is the percent yield.
Explanation:

Moles of methane = 
According to reaction,1 mole of methane gives 1 mole of carbon dioxide gas, then 3.75 moles of methane will give :
of carbon dioxide gas
Mass of 3.75 moles of carbon dioxide gas:
3.75 mol × 44 g/mol = 165 g
Theoretical yield of the carbon dioxide gas = 165 g
Experimental yield of the carbon dioxide gas = 112 g
The percentage yield of the reaction :


67.88% is the percent yield.