Answer:
The Bohr model and all of its successors describe the properties of atomic electrons in terms of a set of allowed (possible) values. Atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states. Direct experimental evidence for the existence of such discrete states was obtained (1914) by the German-born physicists James Franck and Gustav Hertz.
Explanation:
Answer:
gravity is the correct answer to the given question .
Explanation:
The gravity is the gravitational force due to the gravitational the solar system as well as the other body of dimensional object to its center point. The gravitational force maintains all the planetary systems in the orbit over the sun.We can called gravitational force as the universal force .
- The gravitational force attracts the huge object for grabbing the another object.
- All the other option are not attracting the another object that's why these are incorrect option .
Answer:
Approximately 
.
Explanation:
The actual yield of 
was given. The theoretical yield needs to be calculated from the quantity of the reactant.
Balance the equation for the hydrolysis of water:
.
Note the ratio between the coefficient of 
and 
:
.
This ratio will be useful for finding the theoretical yield of .
Look up the relative atomic mass of hydrogen and oxygen on a modern periodic table.
Calculate the formula mass of 
and :
.
.
Calculate the number of moles of molecules in 
of :
.
Make use of the ratio to find the theoretical yield of (in terms of number of moles of molecules.)
.
Calculate the mass of that approximately 
of (theoretical yield.)
.
That would correspond to the theoretical yield of (in term of the mass of the product.)
Given that the actual yield is 
, calculate the percentage yield:
.
The correct answer is C, too deep in the Earth to collect. Hope this helps!
<span>If thermal energy (heat) must be added to a chemical reaction in order for the reaction to take place, the reaction is endothermic. </span>
:
.
:
.