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3 years ago

Which option is a compound? carbon O carbon dioxide O air O oxygen

Chemistry

1 answer:

S_A_V [24]3 years ago

6 0

Answer:

Carbon dioxide is a compound.

Explanation:

Carbon is the sixth element in the periodic table. Located between boron (B) and nitrogen (N), it is a very stable element. Because it is stable, it can be found both by itself and in many naturally occurring compounds. Scientists describe the three states of carbon as diamond, amorphous, and graphite.

Carbon dioxide (CO2 ) is a chemical compound composed two oxygen atoms covalentl bonded to a single carbon atom. Carbon dioxide: Carbon dioxide is a molecule composed of one carbon atom bonded to two oxygen atoms via two double bonds.

Air is mixture, but not a compound because of the following reasons: Air can be separated into its constituents such as oxygen, nitrogen, etc. by fractional distillation of liquid air. Air shows the properties of all gases present in it.

Oxygen in the atmosphere is a molecule because it contains molecular bonds. It is not a compound because it is made from atoms of only one element - oxygen. This type of molecule is called a diatomic molecule, a molecule made from two atoms of the same type.

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Choose the statement below that is TRUE. Question 7 options: The term "strong electrolyte" means that the substance is extremely

Setler [38]

Answer: A weak acid solution consists of mostly nonionized acid molecules.

Explanation:

Strong electrolytes are those solutions which undergo complete dissociation when dissolved in water. The dissociation of strong electrolytes is given by a right arrow.

Weak electrolytes are those solutions which do not undergo complete dissociation when dissolved in water. The dissociation of weak electrolytes is given by a rightleft arrow.

Weak acids are those substances which dissociate partially to give $H^+$ ions when dissolved in water. Thus most of molecules remain unionized in solutions.

$CH_3COOH\rightleftharpoons CH_3COO^-+H^+$

Strong acids are those substances which dissociate completely to give $H^+$ ions when dissolved in water.

$HNO_3(aq.)\rightarrow H^+(aq.)+NO_3^-(aq.)$

3 0

3 years ago

Steam condenses into liquid water (the steam is the system). In this process .... Group of answer choices the heat leaves the sy

Vedmedyk [2.9K]

I need points i’m so srry bro

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4 years ago

Write the net ionic reaction for the following double replacement reaction:

Schach [20]

Net ionic equation

Cu²⁺(aq)+S²⁻(aq)⇒CuS(s)

<h3>Further explanation</h3>

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

In the ion equation, there is a spectator ion that is the ion which does not react because it is present before and after the reaction

When these ions are removed, the ionic equation is called the net ionic equation

For gases and solids including water (H₂O) can be written as an ionized molecule

Reaction

CuSO₄(aq)+Na₂S(aq)⇒CuS(s)+Na₂SO₄

ionic equation

Cu²⁺(aq)+SO₄²⁻(aq)+2Na⁺(aq)+S²⁻(aq)⇒CuS(s)+2Na⁺(aq+SO₄²⁻(aq)

spectator ions : 2Na⁺ and SO₄²⁻

Net ionic equation

Cu²⁺(aq)+S²⁻(aq)⇒CuS(s)

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3 years ago

In the following reaction, 451.4g of lead reacts with excess oxygen forming 356.7g of lead (II) oxide. Calculate the percent yie

Sholpan [36]

Given the reaction 2Pb(s)+O2(g)= 2PbO(s) and a reactant amount of 451.4 grams, we are asked for the yield of the reaction. The amount of lead present produces 451.4/207.2 *( 2/2) *(223.2) via 100% conversion, 486.26 grams lead (II) oxide. hence the percent yield is 356.7g /<span>486.26 g or equal to 73.35 percent</span>

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3 years ago

In the embden-meyerhof pathway, one mole of _____ is converted into two moles of pyruvic acid.

Blababa [14]

The answer that best fits the blank provided above is the term GLUCOSE. The E<span>mbden-Meyerhof-Parnas pathway is a type of glycolysis, therefore, glucose is being converted in this process. Every mole of glucose is converted into two moles of pyruvic acid. Hope this helps.</span>

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3 years ago