Calculate the concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L. Please show work!

Answer: The concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L is 0.036 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in L

moles of \(Ca(OH)_2\) = \(\frac{\text {given mass}}{\text {Molar mass}}=\frac{13.0g}{74g/mol}=0.18mol\)

Now put all the given values in the formula of molality, we get

\(Molarity=\frac{0.18}{5.0L}=0.036M\)

Therefore, the concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L is 0.036 M

ANSWER ALL 4 OF THEM!!!

If a substance has a density of 19 g/cm3, then what is the mass of 8 cm3 of this substance?

Select the correct answer.
Why are business organizations looking for professionals with journalistic skills?

A. to create quality content to connect better with customers

B. to diversify into the field of news reporting

C. to save on the overall cost of hiring

D. to hire ethical and honest professionals

When your muscle gets tired, it builds up the _______ and makes it more powerful.

A.
momentum

B.
blood

C.
cells

D.
tissue

Explain what is happening with the heat transfer in the diagram below.

PLS HELP MY TEACHER IS MAKING ME DO THIS TODAY IF U ANSWER CORRECTLY I WILL HIVE BRAINLY
Glyptodon is a giant, armadillo-like animal that once lived on Earth and weighed over 2000 kilograms (kg) and lived almost exclusively in warm, wet coastal regions. In many ways it resembled the 4 kg armadillo that lives today. From the information given, what is the probable reason Glyptodon is not alive today?

A. Predators hunted the animal for food to the point of extinction.
B.The animal could not adapt to environmental changes.
C.The animal ate too much food.
D. The Glyptodon had genetic variation.

who invented the re-breathers for the fire fighters?

blank is the process in which wind causes particles to bounce across a surface in what direction the wind is blowing

What's lithium ?
Please explain :)

help me fill this page with the right answer please (17 lines minimum please)

What was the low temperature for hurricane Katrina?

Which statement describes the moment magnitude scale?

It measures only small earthquakes.
It collects data using a seismograph.
It shows only the strength of seismic waves that were produced.
It determines the amount of damage caused by an earthquake.

Can NiF2 react with K to produce KF and Ni? Why or why not? Question 3 options: A) No, because Ni and K have lower activity than F B) Yes, because K has higher activity than Ni C) Yes, because K has lower activity than Ni D) No, because F and Ni have the same activity

Please help me por favor :'(

I need help quickly, this assignment is due in a few hours. I have a few 8th grade science questions I need help with. These is not need to explain your answer, just tell me if the answer is a,b, or c. Also, please answer all of the questions listed not just some of them. I will be giving 20 points if you answer, and brainly to the first person to answer. The questions look really complicated but it is mainly just a long description. The questions themselves seem simple.

QUESTION ONE : Miranda was learning to bake bread at home. Her first few batches of dough did not rise, or expand, as much as they should have. Miranda's mother noted that the kitchen was cold and suggested that the dough might not be warm enough to rise. Miranda decided to test her mother's suggestion. She made a large batch of dough and divided it into six equal-sized balls. Then, she put each ball into a bowl. She left three bowls on the counter in the kitchen, where the temperature was 63oF. She left the other three bowls on her desk in her upstairs bedroom, where the temperature was 80F. After one hour, Miranda measured the size of each dough ball.

Which of the following was the dependent variable in the experiment?
a. the temperature where the dough was left to rise
b. the ingredients used to make the dough
c. the size of each dough ball

QUESTION TWO: Jada liked to make guacamole, but she could often find only unripe avocados at the grocery store. In biology class, Jada learned that ripe fruits produce a gas called ethylene that can cause other fruits to ripen. Jada wondered whether storing ripe bananas with unripe avocados would make the avocados ripen faster. Jada prepared four paper bags with five unripe avocados in each bag. She added on ripe banana to two of the bags. Then, Jada sealed all four bags. After three days, she opened each bag and counted the number of ripe avocados in each bag.

Which of the following was the independent variable in this experiment?
a. the type of paper bag used
b. the number of bags with a ripe banana
c. the number of ripe avocados

QUESTION THREE: Colette was using steel to make rusted sculptures. After building each sculpture, she caused the steel in the sculpture to rust by placing it into tub filled with salt water for eight hours. Colette wondered if steel would rust faster submerged in vinegar instead of salt water. To find out, Colette cut ten squares of steel sheet metal and split them into two equal groups. She put one group of squares into a tub filled with salt water and the other group of squares into a tub filled with vinegar. Once an hour for eight hours, Colette counted the number of rusted steel squares in each group.

Which of the following was a variable that was held constant (control variable) in this experiment?
a. the type of liquid used
b. the size of the squares of steel sheet metal
c. the number of rusted steel squares

QUESTION FOUR: David divided 40 unripe bananas evenly among eight paper bags and sealed the bags. He poked 20 small holes in four of the bags and left the other four without holes. He kept the bags at room temperature for three days. Then, David opened the bags and counted the number of brown spots on each banana. He compared the average number of brown spots on bananas from bags with holes to the average number of brown spots on bananas from bags without holes.

Identify the question that David's experiment can best answer.
a. Do bananas develop more brown spots when they are kept at room temperature compared to in a cold refrigerator?
b. Do bananas develop more brown spots if they are kept in bags with holes compared to bags without holes?
c. Do bananas develop more brown spots when they are kept in brown paper bags compared to in a plastic bag?

QUESTION FIVE: Ten groups of chemistry students combined three solutions that, when mixed, chemically reacted and turned blue. Before mixing, five groups of students heated the solutions to 25C, and five other groups heated the solutions to 50C. The students recorded how many seconds it took for the mixtures to turn blue. Then, the groups shared their results, and the class compared the time it took for the mixtures to turn blue at 25C and at 50C.

Identify the question that the students' experiment can best answer.
a. Does the type of color the mixture produces depend on the temperature of the solutions?
b. Does the mixture of solutions release more gas when they are mixed at 25C compared to 50C?
c. Does the mixture's color change faster when the solutions are mixed at 25C or 50C?

what kind of substances and mixtures do you see around you? How do their properties determine what they used for?

If my measurement is 2.34 cm and the ACTUAL value is 2.35 cm, is my measurement accurate?

cual es la diferencia entre capacidad termica calor especifico y calor latente

Part of the Appalachian mountain range is at the same latitude as Tokyo how would their climates compare

Max and Jimmy want to jump on a trampoline. Max begins jumping in a steady pattern, making small waves in the trampoline. Jimmy starts jumping on the trampoline too. Suddenly, Max goes twice as high even though he did not put any extra effort into jumping.

What type of wave interaction is this? Explain how it occurred.

What happens to the atoms that make up hydrogen fuel as it burns?

please help im really stressed and doing 2 tests at the same time

Why do you think that the neutron was the last of the atom components to be discovered?

On the periodic table, elements become more metallic as you move from left to right across a row, and top to bottom down a column.

True

False

Which groups/families are known to have low melting points?

Transition Metals

Alkaline Earth Metals

Halogens

Alkali Metals

Nobel Gases
Scale is defined as how big something is

True

False
How many chlorine atoms are in one molecule of NaCl?

A. 1

B. 0

C. 2

D. Molecules don't have atoms

Which of the following elements is the most reactive?
A. Mn
B. B
C. Sr
D. Kr

Marble is made from limestone under the influence of heat and pressure. The chemical formula for limestone or marble chips is CaCO3. When you added the chips to the acid solutions, they effervesce


What is the gas that is produced?
What is the chemical formula of the gas?
How could you test rocks for the presence of limestone?
Write a balanced symbol model for the reaction of limestone with hydrochloric acid.

Where do you think trees get the nutrients they need to grow?
I​

Help pls thesis for my science class (Amplify lesson 3.4 Middle school)

Can somebody help me with this, please? Please Asap

what is nitrogen metal nonmetal metalloid PLEASE HELP ME!!!!!!!!!!