A chemical compound can be described as substance composed of atoms from more than one element held together by chemical bonds in a fixed stoichiometric proportion. A compound has different physical and chemical properties from its constituent elements.
For example : compound water is made up of H and O bonded together and it has different properties from O and H.
Thus, among the given options, the one coreectly describing a compound is
a) The atoms are bonded together, and the compound has different physical and chemical properties than the individual elements.
Answer:
[OH⁻] = 3.55×10⁻¹⁰M
Explanation:
Given data:
pOH of vinegar = 9.45
[OH] = ?
Solution:
Formula:
pOH = -log[OH⁻]
Now we will put the value of pOH.
9.45 = -log[OH⁻]
[OH⁻] = 10∧-pOH
[OH⁻] = 10⁻⁹°⁴⁵
[OH⁻] = 3.55×10⁻¹⁰M
Answer:
7.0625
Explanation:
The trapezoidal rule ( this is an approximation ) tells you that the average of the left and right endpoints should be as follows,
where 
... at this point we can apply the Riemann Formula, in order to divide the interval 0 ≤ x ≤ 2 into n = 4 subintervals of length 
.
,
= 
- Let's calculate the sub intervals for each, substituting to receive our solution.
( this is as 0⁴ is 0 )
( this is as 
)
( 2 
1⁴ is 2 )
( this is as 
)
And finally 
, as 2⁴ is 16. Therefore, let us plug in our solutions for each into the primary expression, and solve,
= 7.0625 - this is our solution. The correct answer is option c, and i hope this clarifies why.
Electrons are lost because they have a negative charge. neutrons are neutral meaning no charge and protons have a positive charge
