11Cr2O3 + 2Al 2Cr + Al2O3Chromium Is Produced By Reacting Its Oxide With Aluminum. If 76 G Of Cr2O, And (2024)

Answer:

metal and nonmetal it always include

Answer:

Alkynes are saturated hydrocarbons

Explanation:

Alkynes are groups of hydrocarbons that have the general formula of {Cn H2n - 2}. They have a triple carbon to carbon bond (C≡C) in their structure. Ethyne (HC≡CH) is the first member of the alkyne series.

Alkynes like alkenes are unsaturated hydrocarbons because of their triple and double carbon bonds respectively. Unsaturated hydrocarbons do not have a complete hydrogen atom in their structural composition. Hence, the statement that "Alkynes are saturated hydrocarbons" is FALSE.

32.3699% Tin (Sn)

15.2774% Nitrogen (N)

52.3527% Oxygen (O)

Answer:

you diba ikaw ang nagpamalimali diba no

Answer:

c

Explanation:

yxyyyxyxxyxxy yy y gg ff ff d d f t r rr rr rr rr r r t tt t

Answer:

I need this one asap

Explanation:

Please

The amount of heat energy that will be absorbed by the water from the copper is 37.1 J

Data obtained from the question Mass of copper = 11.9 gInitial temperature (T₁) = 55 °CEquilibrium temperature (Tₑ) = 47 °CSpecific heat capacity of copper (C) = 0.39 J/g°CHeat absorbed by water =?

How to determine the heat

Heat lost by copper = heat gained by the water

Thus, we shall determine the heat lost by the copper in order to obtain the heat absorbed by the water

The heat lost by the copper can be obtained as follow:

Mass of copper (M) = 11.9 gInitial temperature (T₁) = 55 °CEquilibrium temperature (Tₑ) = 47 °CChange in temperature (ΔT) = 55 – 47 = 8 °C Specific heat capacity of copper (C) = 0.39 J/g°CHeat (Q) =?

Q = MCΔT

Q = 11.9 × 0.39 × 8

Q = 37.1 J

Thus, the heat absorbed by the water is 37.1 J

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Answer:

2

Explanation:

Pb(NO3)2 + 2NaI 2NaNO3 + PbI2

To see the coefficients of NaI in the given reaction we need to balance the reaction first. The coefficient for Nal once the equation is balanced is 2. the correct option is option B.

What is balanced equation?

Balanced equation is the one where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be created nor be destroyed.

The unbalanced equation is

[tex]\rm Pb(NO_{3})_{2}+ Nal\rightarrow NaNO_{3} + PbI_{2}[/tex]

The atoms of Pb on reactant and product side is 1 so Pb is balanced.

The atoms of N is 2 on reactant and 1 on product side so balance it as

[tex]\rm Pb(NO_{3})_{2}+ Nal\rightarrow 2 NaNO_{3} + PbI_{2}[/tex]

The atoms of O is 6 on reactant and 6 on product side so it is balanced

The atoms of I is 1 on reactant and 2 on product side so balance it as

[tex]\rm Pb(NO_{3})_{2}+2 Nal\rightarrow 2NaNO_{3} + PbI_{2}[/tex]

The atoms of Na on reactant and product side is 2 so Na is balanced.

Now all the elements are balanced

Therefore, the coefficient for Nal once the equation is balanced is 2. the correct option is option B.

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Answer:

a visible record (such as a series of colored bands, or a graph) showing the result of separation of the components of a mixture by chromatography.

Explanation:

Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which is fixed a material called the stationary phase.

Answer:

Chromatography is a technique used to separate mixture of chemical substances into its individual compounds.

Explanation:

Answer:

A person sings into a microphone.

Sound is converted to an electrical signal

The electric signal creates a magnetic code.

A magnetic code is transferred to a medium such as a tape or ...

Answer:

Energy is transferred when one molecule collides with another.

Explanation:

There are 3 processes of heat transfer. They are as follows:

ConductionConvectionRadiation

Conduction is the process of transfer of energy through collisions between neighboring atoms or molecules. When two bodies are in direct contact with each other, the process of conduction occurs.

Hence, the correct option is (A) "Energy is transferred when one molecule collides with another".

Answer:

A. Energy is transferred when one molecule collides with another. Is the correct answer via a p e x

Explanation:

Answer:

4

Explanation:

so first write the balance equation

Ca+2H2O---->Ca(OH)2 + H2

then use molar ratio of H2O and Ca

which is 2:1 so if there are 2 moles of ca there will be 4 moles as you times it by 2. like this

Ca:H2O

1:2

2:4

Hope this helps u understand:)

Answer:

4

Explanation: on the left side of the equation there are 4 carbons, to make 4 carbons on the right side of the equation you need 4 of the CO2 molecules.

Answer:D

Explanation:i did the usa test prep

Answer:answer is D

Explanation:

Answer:

AgNO3 + KI -> Agl + KNO3 is a balance equations which states that When Silver Nitrate (AgNO3) mixed or combined with potassium iodide (KI) it results as Silver iodide (Agl) with Potassium nitrate(KNO3)

Hope it helps

The chemical equation: [tex]\rm AgNO_3 + KI \rightarrow AgI + KNO_3[/tex] represents a reaction between silver nitrate ([tex]\rm AgNO_3[/tex]) and potassium iodide (KI) that yields silver iodide (AgI) and potassium nitrate ([tex]\rm KNO_3[/tex]).

A chemical equation is a symbolic representation of a chemical reaction in the form of reactants and products.

In this reaction: [tex]\rm AgNO_3 + KI \rightarrow AgI + KNO_3[/tex]

The silver ion ([tex]\rm Ag^+[/tex]) from the silver nitrate combines with the iodide ion ([tex]\rm I^-[/tex]) from the potassium iodide to form solid silver iodide (AgI), which is a yellow precipitate. The nitrate ion ([tex]\rm NO^{3-}[/tex]) from the silver nitrate combines with the potassium ion ([tex]\rm K^+[/tex]) from the potassium iodide to form solid potassium nitrate ([tex]\rm KNO_3[/tex]), which is a white crystalline solid.

The chemical equation is balanced, with one atom of silver, one atom of iodine, one atom of potassium, three atoms of nitrogen, and nine atoms of oxygen on both sides of the equation.

Therefore, the balanced chemical equation: [tex]\rm AgNO_3 + KI \rightarrow AgI + KNO_3[/tex]represents a double displacement reaction between silver nitrate and potassium iodide that yields silver iodide and potassium nitrate.

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Answer:

iodine

Explanation:

Answer:

The oxidation state of carbon in CaC204 is 3

Answer:The oxidation number of the carbons + the oxidation numbers of the oxygens must equal -2. Carbons + (-8) = -2 so the oxidation number of the carbons must be +6. Since there are 2 carbon atoms each must contribute +3 each. What is the oxidation number of S in Na2S2O3?

Explanation:

The oxidation state of Oxygen is -2 and that of Calcium is +2. There are four oxygen atoms which amounts to -8 charge. This leaves a charge of +6 on Carbon

Answer:

Solids, liquids, and gases, exist in the human body. The body is mostly made up of liquid because the human body is 60% water. You would most likely be able to find solids (bones), liquids (blood, stomach acid) and gases (oxygen in your lungs or air in your digestive tract).

Explanation:

Answer:

See Explanation

Explanation:

According to Avogadro's law;

V1/n1 = V2/n2

V1 = 5.0 L

n1 = 15.0 moles

V2= ?

n2 = 30.0 moles

V1n2 = V2n1

V2 = 5 * 30/15

V2 = 10 L

2) 1 mole of N2 occupies 22.4 L

3 moles of N2 occupies 3 * 22.4/1 = 67.2 L

3) 1 mole of O2 occupies 22.4 L

x moles occupies 201.6 L

x = 1 mole* 201.6 L/22.4 L

x = 9 moles

4) Density of a gas = mass/volume

Density of a gas = 39.95 g/22.4 L = 1.78 g/L

Answer:

1. 4

2. 2

3. 3

4. 1

Explanation: just did it on edge 2021

Answer:

one.) 4

two.) 2

three.) 3

four.) 1

Answer: The statement, chemicals that you begin with found on the left side of the equation, describes reactant and where they are in a chemical equation.

Explanation:

An equation that includes symbolic formulas and represents chemical reaction between the substances initially present forming new substances is called a chemical equation.

For example, [tex]N_{2} + 3H_{2} \rightarrow 2NH_{3}[/tex]

Here, substances [tex]N_{2}[/tex] and [tex]H_{2}[/tex] are the reactants. Reactants in a chemical equation are always present on the left side as these are the chemicals we begin with.

Also here, [tex]NH_{3}[/tex] is the product. Product(s) in a chemical equation are always present on the right side as these are the chemicals we end with.

Thus, we can conclude that the statement, chemicals that you begin with found on the left side of the equation, describes reactant and where they are in a chemical equation.

Answer:

North America) than in the tropics. Since low pressure systems spin in a counterclockwise fashion, winds move from the west to the east, propelling weather systems to the east. Another MAJOR factor that drives weather systems in the U.S. is that the Jet Steam moves from West to East across North America.

Explanation:

I hope this helped

(Sorry If it didn't)

Answer:

Explanation:

the temperture of the warmer water will make it have more space and have less density in the water.

Answer:

D. an ecosystem

Explanation:

An ecosystem is a community of living organisms (biotic factors) interacting with one another and their physical environment (abiotic factors). In an ecosystem, energy is transferred in a unidirectional manner from one organism to another when they feed on one another. For example, energy is transferred to a goat when it feeds on a plant.

Hence, this system in which energy transference occurs between the community of organisms is an ECOSYSTEM. The transfer of energy is one of the interactions between living organisms.

Answer: 185 grams

Explanation: First find out how many grams are in one mol: The molar mass es are taken from the periodic table, Ca is 40, O is 16, H is 1. There are 2 O and 2 H for (OH)2: 40+32+2= 74g/mol x 2.5 mol = 185 the moles cancel and you are left with grams

Thank you I needed this