Answer:
Carbon exists in several isotopes. ... Carbon-12 has 6 neutrons, carbon-13 has 7 neutrons, and carbon-14 contains 8 neutrons. Carbon-12 and 13 are stable isotopes, which means that the nucleus does not undergo radioactive decay. Carbon-14 possesses an unstable nucleus which undergoes radioactive decay.
Explanation: Trust me :)
Answer:
Cheese will be limiting reactant.
Explanation:
In given question it is stated that two slices of breads are required for one sandwich. The total bread slices available are 52. we divide the 52 by 2 to determine the number of sandwich which could made from 52 slices.
52/2 = 26
26 sandwich could be made from 52 bread slices.
The amount of cheese required for one sandwich is 3 slices. The available slices of cheese are 69.
69/3 = 23
we can see that only 23 set of slices of cheese are available while bread slices are available for 26 sandwiches. so we can make only 23 sandwiches from given quantity of ingredients. The 6 slices or 3 set of bread will left, because cheese is limited.
Answer:
0.900 V
Explanation:
Oxidation half cell;
2Al(s) -----> 2Al^3+(aq) + 6e
Reduction half equation;
3Zn^2+(aq) + 6e ----> 3Zn(s)
E°anode = -1.66V
E°cathode= -0.76 V
E°cell= E°cathode - E°anode
E°cell= -0.76-(-1.66)
E°cell= 0.900 V
The volume of O₂ produced: 84.6 L
<h3>Further explanation</h3>
Given
7.93 mol of dinitrogen pentoxide
T = 48 + 273 = 321 K
P = 125 kPa = 1,23365 atm
Required
Volume of O₂
Solution
Decomposition reaction of dinitrogen pentoxide
2N₂O₅(g)→4NO₂(g)+O₂ (g)
From the equation, mol ratio N₂O₅ : O₂ = 2 : 1, so mol O₂ :
= 0.5 x mol N₂O₅
= 0.5 x 7.93
= 3.965 moles
The volume of O₂ :
Answer:
exemples of elements with 1 valence electron: Hydrogen, lithium, potassium.
exemples of elements with 2 valence electrons: magnessium, calcium.
boron has 3 valence electrons. Phosphorus has 5 valence electrons.
carbon has 4 valence electrons.
exemples of elements with 5 valence electrons: Phosphorus, nitrogen
exemples of elements with 7 valence electrons: fluorine, chlorine
exemples of elements with 8 valence electrons: helium, argon
Explanation:
the easiest way to know the number of electrons are by the number of the group so 14 is 4, 16 is 6.
