CHEMISTRY HIGH SCHOOL

The type of reaction that takes place when one element reacts with a compound to form a new compound and a different element is a ____a. combination reaction.
b. decomposition reaction.
c. single-replacement reaction.
d. double-replacement reaction.

Answers

Answer 1
Answer:

Answer: c. single-replacement reaction.

Explanation:

Combination is a chemical reaction in which two or more than two substances combine to form a single product.

A+B\rightarrow AB

Decomposition is a chemical reaction in which one substance decompose to form two or more than two products.

AB\rightarrow A+B

A single replacement  is a chemical reaction in which a more reactive element displaces a less reactive element from its salt solution, thus one element reacts with a compound to form a new compound and a different element.

A+BC\rightarrow B+AC

Double displacement is a chemical reaction in which ion exchange takes place.

AB+CD\rightarrow AD+BC
Answer 2
Answer: C. single replacement. A single replacement is represented by this formula : AB + C = AC + B

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Oxygen and sulfur have similar chemical properties because both elements have six electrons in their outermost electron shells. Indeed, both oxygen and sulfur form molecules with two hydrogen atoms: water and hydrogen sulfide. Surprisingly, water is a liquid, yet hydrogen sulfide is a gas, even though sulfur is much larger and heavier than oxygen. Propose an explanation for this striking difference.

Answers

Answer:

Electro negativity and polarity of the bond in the both molecules

Explanation:

Approaching the matter from an electro negativity perspective, oxygen is more electronegative than sulphur. This implies that the O-H bind is more polar than the S-H bond.

The high polarity of the O-H bond leads to a higher degree of hydrogen bonding in H2O than in H2S. This higher degree of hydrogen bonding in H2O leads to greater intermolecular association and the substance is a liquid. Hence H2O is liquid but H2S is a gas.

Because water is a liquid, we can conclude that it must have stronger intermolecular forces than the gaseos hydrogen sulfide.

This is true because water is held together in large part by hydrogen bonding, the extremely strong interactions between hydrogen and fluorine, oxygen or nitrogen. Hydrogen sulfide does not have hydrogen bonding so the intermolecular forces are much weaker.

Thus, hydrogen sulfide exists as a gas while water is a liquid.

How does the arrangement of the particles in a solid compare to that of a liquid? ( The arrangement of a solid's and a liquid's particles is the same.

The particles in a solid are farther apart than the particles in a liquid.

The particles in a solid are closer together than the particles in a liquid.

The arrangement of a solid's and a liquid's particles will depend on the mass of the substance.

Answers

The particles in a solid are closer together than the particles in a liquid.
The correct answer is C.

How many primary oxygen systems are there? One Five Three Ten

Answers

The answer is three.
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As ice transforms into steam, A)new molecules are formed. B)the types of atoms are changed. C)energy is absorbed by the molecules. D)the mass of the molecules is increased.

Answers

This is an example of a substance changing state, a physical change, the molecules are changed, but the atoms themselves do not change, just their arrangement, and the mass of the molecules is the same. Therefor energy is absorbed by the molecules, as energy is required to change the state or physicality of a molecule structure.Hope this helps. Let me know if you need additional help!

The answer is C) energy is absorbed by the molecules.

F the solution described in the introduction is cooled to 0 ∘c, what mass of kno3 should crystallize?

Answers

Assuming the other part of the question is;

A solid mixture consists of 44.2g of KNO3 (potassium nitrate) and 7.8g of K2SO4 (potassium sulfate). The mixture is added to 130. g of water. (Assume KNO3 has a solubility of 14 g solute/ 100 g water)

Answer;

26 g

Solution;

-X g of KNO3/ 130 g water= 14 g of KNO3/ 100 g water  

X= 18.2 g (this is the amount of solute that dissolves at 0 degrees C in 130 g water).

if you have 44.3g of KNO3 in 130 g of water at 0 degrees celsius and only 18.2 can dissolve then  

44.2g - 18.2g = 26 g left undisolved which gives you the amount that would crystallize

KNO3 of 10g will undergo crystallization at 0 °

Because the heavier the KNO3 mass will require a higher temperature in the dissolution process.

Further explanation

Potassium nitrate is a nitrate salt compound from potassium with the molecular formula KNO3. Potassium nitrate salt can be made by reacting potassium chloride with sodium nitrate. If the saturated solution each of the solution is mixed with each other, then it will form sodium chloride salt because NaCl in water is small, the salt will settle. By cooling the filtered filtrate KNO3 will undergo crystallization

This compound decomposes with oxygen evolution at 500 ° C according to the reaction equation:

2 NaNO3 (s) -> 2NaNO 2 (s) + O2 (g)

Crystallization is separation by forming crystals so that the mixture can be separated. A gaseous or liquid substance can cool or condense and form crystals because it undergoes a crystallization process. Crystals will also form from a solution that will be saturated with a certain solvent. The more the number of crystals, the better, because the less likely to be polluted by dirt.

Potassium Nitrate has a physical white powder that is easily soluble in water and odorless. Meanwhile, to analyze the structure and characteristics of Potassium Nitrate MM2 data processing is used in the Chemoffice 15.0 application. This data processing is used to determine the shape of compounds, types of bonds in molecular movement compounds and other parts that can not be observed directly by the eye without the aid of tools. And for the form of compounds in 2 dimensions and 3 dimensions used Chemdraw 15.0 and Chem3D 15.0 applications

Learn more

Potassium nitrate brainly.com/question/10847775

Crystallization brainly.com/question/2575925

Details

Grade: High School

Subject: Chemistry

Keyword: kno3, nitrate, crystallization

Elements are composed ofA) many type of atoms.

B) the same type of atom.

C) many different compounds.

D) the same type of compound.

Answers

The correct answer is B, 'the same type of atom'. By definition, an element is a single type of atom. They are the most basic forms of matter, and so they cannot be more than one kind of atom, and they also cannot be a compound, since compounds are made up of multiple atoms.

Hope this helps!

It is a hope it helps
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