Electrons have a negative charge. True False

Making the simplistic assumption that the dissolved NaCl(s) does not affect the volume of the solvent water, determine the const

shtirl [24]

Answer:

m = 1,000/58.5
b = - 1,000 / 58.5

1) Variables

molarity: M
density of the solution: d
moles of NaCl: n₁
mass of NaCl: m₁
molar mass of NaCl: MM₁
total volume in liters: Vt
Volume of water in mililiters: V₂
mass of water: m₂

2) Density of the solution: mass in grams / volume in mililiters

d = [m₁ + m₂] / (1000Vt)

3) Mass of NaCl: m₁

Number of moles = mass in grams / molar mass

⇒ mass in grams = number of moles × molar mass

m₁ = n₁ × MM₁

4) Number of moles of NaCl: n₁

Molarity = number of moles / Volume of solution in liters

M = n₁ / Vt

⇒ n₁ = M × Vt

5) Substitue in the equation of m₁:

m₁ = M × Vt × MM₁

6) Substitute in the equation of density:

d = [M × Vt × MM₁ + m₂] / (1000Vt)

7) Simplify and solve for M

d = M × Vt × MM₁ / (1000Vt) + m₂/ (1000Vt)

d = M × MM₁ / (1000) + m₂/ (1000Vt)

Making the simplistic assumption that the dissolved NaCl(s) does not affect the volume of the solvent water means 1000Vt = V₂

d = M × MM₁ / (1000) + m₂/ V₂

m₂/ V₂ is the density of water: 1.00 g/mL

d = M × MM₁ / (1000) + 1.00 g/mL

M × MM₁ / (1000) = d - 1.00 g/mL

M = [1,000/MM₁] d - 1,000/ MM₁

8) Substituting MM₁ = 58.5 g/mol

M = [1,000/58.5] d - [1,000/ 58.5]

Comparing with the equation Molarity = m×density + b, you obtain:

m = 1,000/58.5
b = - 1,000/58.5

7 0

3 years ago

Read 2 more answers

How many atoms are in 8 grams of helium

Mrrafil [7]

12 x 10^23 atoms, i hope this helps

8 0

3 years ago

27/13Al+4/2He >>>> 30/15P+

Veseljchak [2.6K]

Answer

Explanation:

27/13Al+4/2He >>>> 30/15P+

5 0

3 years ago

Why sometimes the electrons of an atom transfer to higher energy level

Elenna [48]

Answer:

According to Bohr, the amount of energy needed to move an electron from one zone to another is a fixed, finite amount. ... The electron with its extra packet of energy becomes excited, and promptly moves out of its lower energy level and takes up a position in a higher energy level. This situation is unstable, however.

8 0

3 years ago

What is pH a measure of?

s344n2d4d5 [400]

It measures the acidity/basic level, that rules A out
hope this helped a little

4 0

3 years ago

Read 2 more answers