C = Carbon
If you look in a periodic table and see the mass number for carbon. Its estimated around 12.
I believe it's between 1-2 moles.
All you have to do is 13/12 which will give yoy the estimated answer which is around 1.08 mole.
Mass=density x volume, i.e. 1.03 x 85.32 = 87.88 g
Atoms have an overall charge of zero because the charge of the electron is canceled by a proton and a neutron has a net charge of 0.If you were to take out an electron,you will create an ion(ion is an atom with a charge).This ion will have a charge because it now has different amount of electrons and protons.
Source:<span>webcast.berkeley.edu
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Answer:
d. Heat is released from the reaction
Explanation:
A negative enthalpy change indicates that it is an exothermic reaction. Exothermic reactions release heat.
magnesium oxide is: MgO (right side)
so the left side is: Mg + O2
for the equation to be balanced there must be two oxygens on both sides
Mg + O2 = 2MgO
but now the magnesium is uneven, so there must be two magnesiums on each side
the answer is: B) 2Mg + O2 = 2MgO
