A chemist prepares a solution by dissolving 3.166 g of NaNO3 in enough water to make 200 mL of solution. What molar concentration of sodium nitrate should appear on the label?
Answer in units of M.

0.185 M is the molar concentration of sodium nitrate should appear on the label.

Explanation:

Data given:

mass of NaNO3 = 3.166 grams

atomic mass of NaNO3 = 84.99 grams/mole

volume of the solution = 200 ml  or 0.2 litres

molar concentration of sodium nitrate solution = ?

first number of moles of sodium nitrate is calculated as:

number of moles =

number of moles =

number of moles = 0.037 moles

molarity =

putting the values in the equation:

molarity =  

molarity = 0.185

Molar concentration of the sodium nitrate solution made with 3.166 grams of NaNO3 in 200 ml solution is 0.185 M

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !