CHEMISTRY HIGH SCHOOL

Which compound when stirred in water will not pass through filter paper?a. NaCl
b. NH4S

Answers

Answer 1
Answer:

The separation of ammonium sulfide has been possible with filter paper.

Thus, option B is correct.

The dissolution or solubility of the compound has been used for the determination of the sample actions.

The compounds that are soluble has been not be visible independently. The undissolved solute in the sample has been clearly visible discreet in the solution, resulting in the separation by physical means.

Separation through filter paper

Filter paper has been the small pore size material that has been used for the physical separation of the compounds in heterozygous solution.

The solution of NaCl and water has been pure solution, and thus the separation of NaCl has not been possible with the filter paper.

The solution of ammonium sulfide and water has been a heterozygous solution, as ammonium sulfide precipitate out in the solution. Thus, the separation of ammonium sulfide has been possible with filter paper.

Thus, option B is correct.

For more information about, filter paper, refer to the link:

brainly.com/question/6870130
Answer 2
Answer:

The compound when stirred in water will not pass through filter paper is NH4S. The answer is letter B. This is because it is a precipitate that resulted from the reaction of an acid or a base. NaCl will pass through the filter paper because it is soluble in water.

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Answers

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What is the mass number of isotopes of tin that has 66 neutrons and 50 protons
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Answers

Answer:

116

Explanation:

neutrons = mass number - proton number

66 = mass number - 50

add 50 on both sides

66 + 50 = 116

so the mass number is 116

What happens to a spermatid to change it into a sperm cell?

Answers

Answer:

The correct answer is meiosis takes place, making the sperm cell haploid.

Explanation:

From secondary spermatocytes, the formation of haploid male gamete, that is, spermatid takes place. Its formation takes place by the procedure of meiosis, and therefore, it comprises half of the genetic substance as found in in the primary spermatocyte.  

In the beginning, spermatid is a round, immotile cell that distinguishes and turns motile and unique by the procedure is known as spermiogenesis.  
The process in which the spermatogonia that are located in the base portion of the germinal epithelium and differentiate it into a sperm is called spermatogenesis. The spermatid is an immature sex cell that is from a spermatocyte and after it had gone meiosis it will transform into a new mature sperm cell.

How many moles are in 11.82 grams of gold?

Answers

11.82 x 1 mole / (molar mass) 
The molar mass = 197 g/mol

11.82 / 197 = .06

You have a stock bottle of HCl (aq) which is 12.1M, You need 400 mL of 0.10M HCl. How much of the acid and how much water will you need?

Answers

Mols of acid needed: 0.4 liters x 0.10 mol/liter = 0.04 mol

Volumen of acid in the bottle than contaiins 0.04 mol of acid: V = #moles/M = 0.04 mol/12.1 mol/liter = 0.003306 liters = 3.306 ml

Then you need 3.3 ml of acid from the bottle and 396.7 ml of pure water to get 400 ml of acid 0,1 M

Which two compounds have the same molecular formula but different chemical and physical properties?(1) CH3CH2Cl and CH3CH2Br
(2) CH3CHCH2 and CH3CH2CH3
(3) CH3CHO and CH3COCH3
(4) CH3CH2OH and CH3OCH3

Answers

Answer is (4) - CH₃CH₂OH and CH₃OCH₃.


Both CH₃CH₂OH and CH₃OCH₃ have same molecular formula as C₂H₆O. But CH₃CH₂OH is an alcohol and CH₃OCH₃ is an ether.


Although two compounds have a same molecular formula, the atomic arrangement of those compounds differs from each other.


Hence, CH₃CH₂OH and CH₃OCH₃ are isomers of the formula C₂H₆O.


Due to the different arrangement of atoms, both compounds have different chemical and physical properties.
The answer is (4) CH3CH2OH and CH3OCH3. You need to figure out which pair has the same molecular formula which means that they have the same number of same atoms. Then you can get the write answer.
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