How many grams of nacl are required to prepare 60ml of a 19% solution

To prepare 60 mL of a 19% solution, you will need 11.4 grams of NaCl.

Explanation:

Solutions can be considered as formed by two components: a solute (the component in lower proportion) and a solvent (the one in bigger proportion). Sometimes we refer to solution concentration in terms of the percentage of solute respect to that of solution. You can express solution´s concentration in units of precentage mass in volume (% m/v), percentage mass in mass (% m/m) or percentage volume in volume (% v/v), among others. Here the numerator refers to the solute and denominator to solution. All these units are refered to 100 mililiters of solution.

In the present case, the quantity of NaCl (solute) is asked in grams and that of solution is given in mililiters.

19 % m/v = 19 grams of NaCl/100 mililiters of solution. So,

19 grams NaCl 100 ml solution

            11.4 =x 60 ml solution.

Finally, to prepare 60 mL of a 19% solution, you will need 11.4 grams of NaCl.

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.