All categories

3 years ago

If 6.5 L of water is added to 4.5 L of a 2.8 M Ca(OH)2 solution, what is the molarity of the new solution?

1 answer:

6 0

Find moles of Ca(OH)2 first:

moles = 2.8 x 4.5 = 12.6

Now,
After addition, new volume = 6.5 + 4.5 = 11.0

So, new molarity = 12.6 / 11 = 1.145

You might be interested in

Which statement is right please explain giving brainliest

Anna11 [10]

Answer:

Explanation:

Because if I said its 35 degrees outside that has nothing to do with climate maybe if I said its usually 35 degrees in the month of December but just saying what temperature it doesn't tell you anything about climate

Well, the definition of climate is the weather conditions prevailing in an area in general or over a long period so I don't really know

So maybe it is d

7 0

3 years ago

Read 2 more answers

Below is a diagram showing the chemical energy (Ech) for the formation of water. Is the reaction exothermic or endothermic?

BigorU [14]

Answer: exothermic

Explanation: chemical reactions that release energy is called exothermic, and in this case, more energy is being released. (I THINK)

6 0

3 years ago

For a solution of acetic acid (CH3COOH) to be called “vinegar,” it must contain 5.00% acetic acid by mass. If a vinegar is made

emmasim [6.3K]

Answer:

M = 0.838 M

Explanation:

1) Data:

a) Acetic acid CH₃COOH

b) molar mass of CH₃COOH: 60.052 g/mol

c) %: = 5.00%

d) d = 1.006 g/ml

e) M = ?

2) Formulae:

a) M = n of solute / V of solution in liters

b) n = mass in grams / molar mass

c) % = (mass of solute / mass of solution)×100

d) d = mass / volume

3) Solution:

a) Assume a basis

V = 1 liter of solution

b) Calculate the mass of that basis (1 liter of solution)

d = mass / V ⇒ mass = d × V

mass = 1.006 g/ml × 1 liter × 1,000 ml/liter = 1006 g

c) Calculate the mass of solute

% = (mass of solute / mass of solution ) × 100 ⇒

mass of solute = % × mass of solution / 100 = 5.00% × 1,006 g / 100

mass of solute = 50.3 g

d) Calculate the number of moles of solute

n = mass in grams / molar mass = 50.3 g / 60.052 g/mol = 0.838 mol

e) Calculate molarity

M = n / V in liter = 0.838 mol / 1 liter = 0.838 M ← answer

6 0

3 years ago

Blood is brought by the veins to the lungs to become oxygenated. Oxygenation occurs at the small structures of the lungs called

Licemer1 [7]

Answer:

Where does the exchange of the blood in the veins and oxygen in the lungs take place?

ALVEOLI are the very small air sacs where the exchange of oxygen and carbon dioxide takes place. CAPILLARIES are blood vessels in the walls of the alveoli. Blood passes through the capillaries, entering through your PULMONARY ARTERY and leaving via your PULMONARY VEIN

Explanation:

5 0

3 years ago

Read 2 more answers

Malic acid, C4H6O5, has been isolated from apples. Because this compound reacts with 2 molar equivalents of base, it is a dicarb

Flura [38]

Answer and explanation:

The attached figure shows five different structures for the chemical formula C4H5O5, but only one of these structures represent the malic acid.

Malic acid is a dicarboxylic acid, this means malic acid has two

-COOH groups. Also, malic acid is a secundary alcohol, which means it has a R2-C-OH group.

-Structure A has two carboxylic groups, but it doesn´t have a secundary alcohol.

-Structure B doesn´t have any caborxylic group.

-Structure C has two carboxylic groups and it is a secundary alcohol. Structure C is the Malic acid

4 0

3 years ago