Answer:
option D is correct answer of this question
Answer:
a)The total number of platinum atoms are
.
b)The radius of a Pt atom is 138.7 pm.
Explanation:
a) Let the total number of platinum atoms be x
And mass of x atoms of platinum be m
Edge length of platinum cube ,s= 1.0 cm
Volume of the cube = 
Density of the platinum cube = 
Mass = Density × Volume

Mass of an atom of platinum = 


b) If only 74 percent of the space inside the cube is taken up by Pt atoms.
Volume occupied by platinum atoms = 74% of 

Volume occupied by
atoms is
.



The radius of a Pt atom is 138.7 pm.
The answer is alkene.
An alkane is a saturated hydrocarbon, thi is it has only single bonds.
Alkenes and alkynes are unsaturated: alkenes have double bonds and alkynes have triple bonds.
Subsituted hydrocarbon, is a hydrocarbon with one hydrogen substituted by another element or a group.
For example:
CH3 - CH - CH3
|
F
Answer:
The real answer for a is-He(helium)4,002602
The answer for b is-Mg(Magnesium) 24.305
Answer:
A: 5
B: 2
C: 15
D: 8
E: O for Oxygen
Explanation:
The atomic numbers must be equal on both sides of the equation, thankfully making this a simple math problem. The nitrogen captures a proton to create Oxygen 15.