Answer:
2.5L [NaCl] concentrate needs to be 4.8 Molar solution before dilution to prep 10L of 1.2M KNO₃ solution.
Explanation:
Generally, moles of solute in solution before dilution must equal moles of solute after dilution.
By definition Molarity = moles solute/volume of solution in Liters
=> moles solute = Molarity x Volume (L)
Apply moles before dilution = moles after dilution ...
=> (Molarity X Volume)before dilution = (Molarity X Volume)after dilution
=> (M)(2.5L)before = (1.2M)(10.0L)after
=> Molarity of 2.5L concentrate = (1.2M)(10.0L)/(2.5L) = 4.8 Molar concentrate
Answer:
False
Explanation:
The statement is implying that this is the only way to obtain a salt. Any ionic compound is a salt. For example, NaCl (table salt) is an ionic compound. It is the combination of a nonmetal (Cl) and a metal (Na).
Molecules consisted only of hydrogen and carbon elements are called hydrocarbons, or organic molecules since they are found in living things.
Depending on their structure and the chemical bonds between the elements, they can be divided into three groups :
1) saturated ( which have only single bonds between the hydrogen and carbon atoms eg. CH3-CH3 )
2)non-saturated ( which have two or three bonds between the carbon and hydrogen atoms eg. CH2=CH2)
3) aromatic (having the aromatic ring )
Because kinetic energy is proportional to the velocity squared, increases in velocity will have an exponentially greater effect on translational kinetic energy. Doubling the mass of an object will only double its kinetic energy, but doubling the velocity of the object will quadruple its velocity.
hope this helps
