Chemistry Middle School

0.450 moles of K2SO4 are dissolved in 195.0 mL of water. Calculate the molarity of the solution.

Answers

Answer 1

Answer:

2.31M

Explanation:

The following data were obtained from the question:

Mole of K2SO4 = 0.450 mole

Volume of water = 195.0 mL = 195/1000 = 0.195L

Molarity =...?

Molarity is defined as the mole of solute per unit litre of the solution. This can be expressed as:

Molarity = mole /Volume

With the above formula we can calculate the molarity of the K2SO4 solution as follow:

Molarity = mole /Volume

Molarity = 0.450/0.195

Molarity = 2.31M

Related Questions

what happens to the density of a box full of leaves if you crush up all the leaves and place them in another box

A the density increases

B the density stays the same

C the density decreases

D the density first decreases, then increases

Answers

Answer:

B the density stays the same

Why is soap mixed with water?
O A. The soap turns the water molecules into a nonpolar solvent.
B. It covalently bonds to the water so it can be washed away.
O C. Its polar end mixes with the water so it can be washed away.
D. The soap becomes chemically active when mixed with water.

Answers

Answer:

Explanation:

Soap breaks up the oil into smaller drops, which can mix with the water. It works because soap is made up of molecules with two very different ends. One end of soap molecules love water - they are hydrophilic. The other end of soap molecues hate water - they are hydrophobic.

Answer:

C. Its polar end mixes with the water so it can be washed away.

Explanation:

Just took test

A typical cell phone uses wavelength of 0.36meters. How much energy does this wave have?

Answers

Answer:

55×10^-26 J

Explanation:

We can calculate the energy of the wave from

E= hc/λ

Where

h= Planks constant = 6.6×10^-34 Is

c= speed of light = 3×10^8 ms-1

λ= wavelength of the wave = 0.36 metres

Recall that cell phone use radio waves which belong to the electromagnetic spectrum hence it must possess the speed of light.

E= 6.6×10^-34 × 3×10^8/ 0.36

E= 55×10^-26 J

Hence the energy possessed by 0.36 meters wavelength radio waves is 55×10^-26 J

What is El Nino and La Nina explained? Please help fast

Answers

Answer:

el nino: the boy

la nina: the girl

Explanation:

Answer:

el nino is dinosour la nino is fishcat

Explanation:

aight imma let you guys i

Answers

Answer:

Explanation:

it is right

Ksskskskdkejdidkk bysco sskkskskskskskskskskskkskskskskskskskkssk

Need help with these three pls!!!!!

Answers

True because

False

True

1) true , 2) false , 3) true

Other Questions

Rohit placed a pencil perpendicular to principal axis in front of a convergingmirror of focal length 30 cm. The image formed is twice the size of the pencil.Calculate the distance of the object from the mirror. What is the range of the function y= e^4x HELPPPPPPP!!!!!!An interglacial is a period of time that occurs between Ice Ages. During previous interglacials, the CO2 levels in the atmosphere were about 300 parts per million (ppm). In 2013, they were approximately 420 ppm. Rounding to the nearest percent, what is the percent increase in CO2 between these two time periods? The states through which the Tropic of Cancer passes Simplify (-2x^3)2yy^9 A mother has one allele for dimples and one allele for no dimples. How manyof her gametes will carry the allele for dimples?A. 0%B. 25%C. 100%D. 50% Factor the expression below.x2 - 6x + 9A.(x + 3)(x + 3)B.3(x2 - 2x + 3)OC. (x-3)(x-3)OD.(x - 3)(x + 3) HELP Which year did hitler become a dictator? The dnsity of aluminum is 2. 70 g/mL. if the mass of a piece of aluminum is 244 grams, what is the volume of the aluminum Solve: 3x+ 4 = 5x - 4x - 8 Carbon is an organic element found in all life forms. Which of the followingoccurs through the process of breaking down carbon-based molecules?Water molecules are transferred through the body.Elimination of waste products occurs.Energy needed for life functions is releasedAbsorbing of oxygen through pore occurs. WEHow can the Roman Empire's expansion be described?O It reached every continent.It doubled the size of the republic.Roman rule finally reached Africa.Growth in Asia was reduced. Which figures can be circumscribed by a circle? Select all that apply. Evaluate the expression 3 x{10 +1} +5. Suppose Mr. Lane just bought a share of BlueWind Co., a renewable energy startup. BlueWind promises to pay Mr. Lane $18 in dividends for one year and then the firm will shut down. Suppose that the liquidation value of the share is $3, and the rate of time preference is 5%. Then, according to the single-period dividend discount model, the present value of the cash payment received by Mr. Lane in one year would be asappppWhat is the lateral area of the rectangular prismshown below?a. 128 ft2b. 135 ft2c. 238 ft2d. 504 ft2 The change in entropy, Srxn , is related to the the change in the number of moles of gas molecules, ngas . Determine the change in the moles of gas for each of the reactions and decide if the entropy increases, decreases, or has little or no change. A. 2H2(g)+O2(g) 2H2O(l) ngas= mol The entropy, Srxn , increases. decreases. has little or no change. how did japan change during the Heian empire/period What I want you to do is think of yourself as a tourist who just landed in Nebraska. You've decided to take a road trip across the northwestern US (as presented in the states shown on the map) and you want to cross each state border exactly once. So for example, you want to make sure that you cross the border between SD-ND, SD-NE, SD-WY, SD-MT. You don't just want to visit South Dakota, but you want to cross all of the borders as well... but only once! You can visit each state as many times as you wish, but you can only cross each border once. Can you think of a way to cross ALL of the state borders in the map exactly once, while ending back where you started in Nebraska? Ami and Bert are drawing plans for rectangular vegetable gardens. In Ami's plan, the garden is 16 feet by 13 feet. In Bert's plan, the garden is 18 feet by 18 feet.Select all true statement(s).A The area of Berts garden is 116 square feet greater than Amis.B The area of Amis garden is 208 square feet.C The area of Berts garden is 72 square feet.D Amis garden has a greater area than Berts garden.