Given :
Normal atom.
To Find :
The ratio of protons to electrons in all normal atoms.
Solution :
Here normal atom means neutral atoms i.e atoms whose charge is zero.
Atom charge is zero when number of proton are equal to number of electrons.
So,
Therefore, the ratio of protons to electrons in all normal atoms is 1.
Hence, this is the required solution.
Plants need oxygen to survive.
The answer is A hopefully it is ok ✅
Answer:
a) ΔU = 370 KJ
b) Endothermic
Explanation:
a)
The change in energy of the mixture can be given by first law of thermodynamics as:
ΔQ = ΔU + W
ΔU = ΔQ - W
where,
ΔQ = change in heat energy of system
ΔU = Change in internal energy of gases
W = Work done on gases = - 155 KJ
For an isobaric process (i.e constant pressure) we know that:
ΔQ = change in enthalpy = ΔH
ΔQ = 215 KJ
Therefore, using values in the equation, we get:
ΔU = 215 KJ - (-155 KJ)
<u>ΔU = 370 KJ</u>
b)
Since, the enthalpy of products is greater than the reactants. Therefore, this is an <u>endothermic reaction</u>.
Salt and water is a homogeneous mixture. Sand and water,salad dressing,soil are heterogeneous mixtures.