Use the following image to answer the following questions. A student was performing an experiment using two identical cups made of styrofoam. The student had Cup A holding water at 90℃ and Cup B holding water at 20℃. The student then put an Aluminum Bar into each cup that was touching the water. As time passed, the student noticed that the temperature of the water in Cup A and Cup B began to change. Question:
A. Predict what will happen to the temperature of the water in Cup A and Cup B after 1 hour has passed.
B. Explain and give evidence for what type of heat transfer is occurring between the 2 cups.

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Answer:

Explanation:

It is necessary to run TLC in a closed container and have the interior saturated with the solvent vapor to ensure maximum resolution between components and to prevent solvent evaporating off. If the solvent evaporates off, the Rf value would be lower than the expected value.

Answer:

Explanation:

Carbon monoxide →  Prevents oxygen from being transported in the body

Nitrogen oxides → Can cause asthma

Particulate matter → Irritates lungs, dizziness, seizures, or death

Sulfur oxides → Inflammation and irritation of the respiratory system

I hope this helps!

Answer:

Krypton is the element

Symbol: Kr

Answer:

5 what

Explanation:

not enough information

Answer:

hello

Explanation:

hello

Answer:

A mixture of solid particles and gases in the air.

Explanation:

Air pollution is a mixture of solid particles and gases in the air. car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.

Air pollution can be defined as the presence of toxic chemicals or compounds (including those of biological origin) in the air, at levels that pose a health risk. In an even broader sense, air pollution means the presence of chemicals or compounds in the air which are usually not present and which lower the quality of the air or cause detrimental changes to the quality of life (such as the damaging of the ozone layer or causing global warming).

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Bromo-ethene is a product and it is a electrophilic addition reaction.

A chemical equation is a method of representing a symbols and formulas of substance involved in this equation.

For example:  zinc metal reacts with dilute sulfuric acid to form zinc sulfate and hydrogen gas.

Types of chemical reactions:

Electrophilic addition reaction

In this reaction containing a double or triple bond and this one hour breakdown into 2 π and 2 Sigma bonds.

In this reaction HBr undergoes heterolytic bond fusion the protons bonds with the carbon atom of the Carbon triple bond this result in the formation of carbo cation immediate the bromide iron forms a bond with the carbon cation producing Bromo-Ethene.

CH ≡ CBr + 2HBr  →  Br-CH=CH₂ (Bromo-ethene)

In these reaction Bromo-ethyne react with hydrogen bromide it form Bromo-ethene.

Bromo-ethene is a product and it is a electrophilic addition reaction.

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Answer: I think the alcohol molecules slip between the water molecules and take up that space, so you have less that you started with.

Explanation:

Answer:

Explanation: because more is always better

Answer:

159.808 g/mol

Answer:

159.80 g/mol

Explanation:

79.90×2=159.80g/mol

Answer:

It is a water molecule.

Explanation:

A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.

Answer:

A water molecule is an example of a molecule created through covalent bonding. Water is made up of one oxygen atom and 2 hydrogen atoms, hence the chemical symbol H2O. A hydrogen atom is made up of 1 proton at its core and 1 electron that revolves around the core in a three-dimensional orbit.

Explanation:

Answer:

Its the first one

Explanation:

I learned this before

2. You work for an environmental company as an environmental toxicologist and have been hired to determine the contaminant present in a local resident’s pool. Create a flow chart outlining how you would detect the possible presence of Fe2+ and/or Sr2+

Answer:

45 grams

Explanation:

Explanation:

I'm sorry if this doesn't answer this correctly but solid liquid solider solid liquid/solid

Answer:

2 Hydrogen atoms and 1 Oxygen atoms makes water

Explanation:

Hope this helps^^

Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,

Explanation: i hopes it helps :)

Answer:

lone pairs and bonds both repulsive each other

Explanation:

therefore bond angles will be changed that leads to the original geometry in nature

The correct name of the compound CuCl is copper I chloride.

An ionic compound is formed two atoms when one loose electrons and the other atoms gains those electrons. Ionic bonds are actually an ion pair, a pair of oppositely charged ions held together by electrostatic interaction. Transition metals are elements with incompletely filled d orbitals. Copper is a transition element.

The compound CuCl is named copper I chloride. We can see that the copper is in the +1 oxidation state in this compound hence the name.

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Answer:

copper(I) chloride

Explanation:

Edge 2021

Answer:

A

Explanation:

Because it is the greatest

Answer:

1st blank : Atoms

2nd blank : Reactants

I'm still trying to find the 3rd blank. I'll put it in comments if I find it

Explanation:

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Answer:

i cant read it but its c and a

Explanation:

my thinking faces

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

density = 2.70 g/cm³

volume = 50 cm³

We have

mass = 2.70 × 50 = 135

We have the final answer as

Hope this helps you

Answer:

Diamond has a giant molecular structure. Each carbon atom is covalently bonded to four other carbon atoms. A lot of energy is needed to separate the atoms in diamond. This is because covalent bonds are strong, and diamond contains very many covalent bonds.

Graphite on the other hand has flat layers of carbon atoms held by weak van der Waal's forces which makes Graphite a weak object and easily breakable.

As graphite contains layers of carbon atoms. The layers slide over each other easily because there are only weak forces between them, making graphite slippery. These electrons can move through the graphite, carrying charge from place to place and allowing graphite to conduct electricity.One valence electron of each carbon atom remains free, Thus making graphite a good conductor of electricity. Whereas in diamond, they have no free mobile electron. Hence there won't be flow of electrons That is the reason behind diamond are bad conductor electricity.These electrons are free to move between the layers in graphite, so graphite can conduct electricity.The forces between the layers in graphite are weak. This means that the layers can slide over each other.

Answer:

my answer is num:3 Hydrogen and oxygen.

Answer:

frequency  = 8.22 x 10¹⁴ s⁻¹

Explanation:

An electron's positional potential energy while in a given principle quantum energy level is given by Eₙ = - A/n² and A = constant = 2.18 x 10⁻¹⁸j. So to remove an electron from the valence level of Boron (₅B), energy need be added to promote the electron from n = 2 to n = ∞. That is, ΔE(ionization) = E(n=∞) - E(n=2) = (-A/(∞)²) - (-A/(2)²) = [2.18 x 10⁻¹⁸j/4] joules = 5.45 x 10⁻¹⁹ joules.

The frequency (f) of the wave ionization energy can then be determined from the expression ΔE(izn) = h·f; h = Planck's Constant = 6.63 x 10⁻³⁴j·s. That is:

ΔE(izn) = h·f => f = ΔE(izn)/h = 5.45 x 10⁻¹⁹ j/6.63 x 10⁻³⁴ j·s = 8.22 x 10¹⁴ s⁻¹

C4H9OH is the substrate, Br- is the nucleophile and H2O is the leaving group.

In an SN1 reaction, the rate limiting step is the formation of the carbocation. The carbocation is formed as water which is the leaving group departs. After the leaving group departs, the nucleophile (Br-) attacks to yield the major organic product. The protonation of the -OH group  is the first step in the reaction.

It then follows that, C4H9OH is the substrate, Br- is the nucleophile and H2O is the leaving group.

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Answer:

55.845

Explanation:

yep

Answer:

The atomic number of the element Radium (Ra) is 88. It is an alkaline earth metal. Electronic configuration of Radium (Ra) will be [Rn]7s^{2}[Rn]7s

2

It belongs to the group IIA of the periodic table. Alkaline earth metals that belong to the group IIA of the periodic table lose the valence electrons to form a +2 ion.

Therefore, Radium with an electronic configuration of [Rn]7s^{2}[Rn]7s

2

will lose the two 7s electrons to form the cation with +2 charge.

Answer:

Oxidation and Reduction occurs

Explanation:

To determine the shapes of molecules, we must become acquainted with the Lewis electron dot structure. Although the Lewis theory does not determine the shapes of molecules, it is the first step in predicting shapes of molecules. The Lewis structure helps us identify the bond pairs and the lone pairs.

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