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2 years ago

What type of solution do you have if you dissolve 20.2 g of potassium chlorate in 0.300 L

Chemistry

1 answer:

lara31 [8.8K]2 years ago

4 0

solution of potassium chlorate,

, has 20 grams of the salt dissolved in 100 grams of water at 70 C. Approximately how many more grams of the salt can be added to the solution before reaching the saturation point?

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Suppose you decide to define your own temperature scale using the freezing point (13 degrees C) and boiling point (360 degrees C

podryga [215]

M.P of oleic acid = 13 deg C
B.Pof oleic acid = 360 deg C 

(360 - 13) / 100 = 3.47 
So 1 deg O = 3.47 deg C 

The scale do not start at 0 deg C, it starts at 13 deg C. So to convert deg C to deg O,
subtract 13 then divide by 3.47 

deg O = (deg C - 13) / 3.47 

convert O to C multiply by 3.47 then add 13 

deg C = (deg O x 3.47) + 13 

convert 0 deg C to deg O 
deg O = (0 deg C - 13) / 3.47 
= - 3.75 deg O

8 0

3 years ago

After centrifugation of the sample, the student was not careful and some of the solid was transferred to the Erlenmeyer flask al

Tju [1.3M]

The fact that some of the solid was transferred would decrease the mass of the limiting reactant.

<h3>What is the limiting reactant?</h3>

We know that in a chemical reaction, there are at least two substances that are combined in order to give the product of the reaction. We also know that the product that we obtain must be in accordance to the stoichiometry of the reaction.

It is common to see that one of the reactants would be present in a very large amount while the other reactant would be present only in quite a small amount. The reactant that is present in a small amount is said to be the limiting reactant while the one that is present in the large amount is said to be the reactant that is in excess.

Having said this, we know that the mass of the limiting reactant can be obtained from the mass of the solid that is obtained after the reaction.

If we do not take out all of the solid from the centrifuge, the mass would not be accurately weighed and the mass of the limiting reactant would not be accurately determined.

Learn more about mass of the product:brainly.com/question/19694949

#SPJ1

5 0

1 year ago

What weight of sodium formate must be added to 4.00L of 1.00 M formic acid to produce a buffer solution that has a pH of 3.50?

tester [92]

Answer:

156,4 g of sodium formate

Explanation:

The pka of the formic acid is 3,74. Using Henderson-Hasselbalch formula:

pH = pka + log₁₀ [A⁻] / [HA] (1)

Where A⁻ is the conjugate base (Formate) and HA is the formic acid.

4.00L of 1.00M formic acid contain:

4.00L × (1.00mol /L) = 4.00 moles

Replacing these moles, the desired pH and the pka value in (1):

3,50 = 3,74 log₁₀ [A⁻] / 4,00 moles

-0,24 = log₁₀ [A⁻] / 4,00 moles

0,575 = [A⁻] / 4,00 moles

2,30 moles = [A⁻]

That means you need 2,30 moles of formate (Sodium formate), to produce the desired buffer. As the molar mass of sodium formate is 68,01g/mol, the weight of sodium formate that must be added is:

2,30mol×(68,01g/mol) = 156,4 g of sodium formate.

I hope it helps!

7 0

3 years ago

11. Selecting specific traits to create a new breed of an animal would be an

Lynna [10]

Selective breeding

The Alleles

DNA

X and Y chromosome from mother and father

Nucleus

Gene

Explanation:

In selective breeding, a specific trait of the animal is considered and the gene coding for that trait is used to create new breeds. Example - cow producing lot of milk.

Genotypes are always expressed by the alleles.
Example - Genotype of Tall plants would be TT or Tt

Information is passed from parents to offsprings from the information stored in DNA.
A gender of an individual is determined by the x chromosomes of mother and X and Y chromosome of father.
X chromosome from mother and X chromosome from father would form a female and X chromosome from mother and Y chromosome from father would form a male.
DNA is located inside the nucleus of the cell
Gene is the segment of chromosome that codes for a specific protein. The non coding segment of chromososme is heterochromatin.

7 0

3 years ago

Balance equation C5H10+O2=CO2+H2O

Crazy boy [7]

Answer:

2 C5H10 + 15 O2 => 10 CO2 + 10 H2O

Explanation: Each individual atom both in the reactant and product side have equal number of atoms.

Reactant Product

Carbon 10 10

Hydrogen 20 20

Oxygen 30 30

7 0

3 years ago

Read 2 more answers