Draw it draw lewis dot structures for each hypothetical molecule shown below, using the correct number of valence electrons for
each atom. determine which molecule makes sense because each atom has a complete valence shell and each bond has the correct number of electrons. explain what makes the other molecules nonsensical, considering the num- ber of bonds each type of atom can make
1 answer:
The first molecule is a sensible molecule having complete octet of each atom such as C, H and O whereas the second molecule having hydrogen present between the aldehyde and methyl group and thus showing hydrogen is making bond with aldehyde and methyl as well which is not possible because hydrogen only having one electron in its octet due to which it can only form a single bond by sharing its valence electron.
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<u>Answer:</u> The percentage by mass of NaCl in the mixture is 38.5 %
<u>Explanation:</u>
To calculate the mass percentage of element in compound, we use the equation:
.......(1)
- <u>For NaCl:</u>
Mass of sodium element = 23 g
Mass of NaCl = 58.5 g
Putting values in equation 1, we get:
Mass fraction of sodium metal in NaCl = 0.3932
- <u>For
:</u>
Mass of sodium element = 23 g
Mass of = 85 g
Putting values in equation 1, we get:
Mass fraction of sodium metal in sodium nitrate = 0.271
Let us assume the mass fraction of NaCl in the mixture is 'x'
So, the mass fraction of in the mixture will be '(1-x)'
We are given:
Percent by mass of Na in the mixture = 31.8 %
Mass fraction of Na in the mixture = 0.318
Evaluating the mass fraction of NaCl in the mixture:
x = 0.385
Percent by mass of NaCl in the mixture will be =
Hence, the percentage by mass of NaCl in the mixture is 38.5 %
Newton's first law of motion predicts the behavior of objects where all existing forces are balanced. Objects at equilibrium will not accelerate. Also, an object will only accelerate if there is a net or unbalanced force acting upon it. The presence of an unbalanced force will accelerate an object - changing its speed, its direction, or both its speed and direction.
Newton's second law of motion: behavior of objects for and all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
