70 POINTS AND BRAINLIEST ASAPPPP
During an investigation, the contents of two test tubes were mixed in two different water baths at different temperatures. A record of the investigation is shown below:

Investigation Record
Water Bath Temperature of Bath Substances in Test Tubes
1 160 °F one test tube with deep blue colored starch and iodine solution; one test tube with saliva solution
2 80 °F one test tube with deep blue colored starch and iodine solution; one test tube with saliva solution


The deep blue color of the starch and iodine solution disappears when it reacts with saliva. Which of the following best explains the rate of disappearance of the color when the substances in the test tubes were mixed? (5 points)
Faster in Bath 1 as molecules collide more frequently in Bath 1 than Bath 2
Faster in Bath 2 as molecules collide more frequently in Bath 2 than Bath 1
Faster in Bath 1 as molecules move slower in Bath 1 than Bath 2
Faster in Bath 2 as molecules move slower in Bath 2 than Bath 1

Answer:

b) Glucitol

Explanation:

The glucose loses the carbonyl group and its transformed to CH2OH

Answer:

1.76 x 10²²molecucles

Explanation:

Given parameters:

Mass of the sugar  C₁₂H₂₂O₁₁  = 10g

Unknown:

Number of molecules  = ?

Solution:

The number of molecules can be determined if we find the number of moles first.

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  Molar mass of C₁₂H₂₂O₁₁ = 12(12) + 22(1) + 11(16) = 342g/mol

 Number of moles  = [tex]\frac{10}{342}[/tex]   = 0.029mole

1 mole of C₁₂H₂₂O₁₁ will contain 6.02 x 10²³

  0.029 mole of C₁₂H₂₂O₁₁ will be made up of 0.029 x 6.02 x 10²³

                         = 1.76 x 10²²molecucles

Answer:

Sodium and Argon

Explanation:

Answer:

probably b i got nothing but i hop eit is good

Explanation:

Explanation:

There are ten d electrons in the outermost d subshell for Zn2+.

Answer:

It would produce ethane (CH₃CH₃)

Explanation:

Ethylmagnesium bromide (CH₃CH₂MgBr) is a Grignard's reagent.

It is a highly reactive substance, and as any alkylmagnesium bromide

(R-CH₂MgBr) it reacts with water to produce an alkane (R-CH₃). R stands for any carbon structure bonded to that functional group.

Answer:2.2

Explanation:

they deserve a brainliest :)

Answer:

A 9 moles of reactants changes into 11 moles of product

Explanation:

Answer:

4-5

Explanation:

maybe 5

Answer:

The bond in a homonuclear diatomic molecule is non-polar due to the electronegativity difference of zero

Explanation:

The number of vum the man can trade for is = 108 vum

The number of sop the man has = 4 sop.

But the exchange rates are as follows:

1 fot = 5 vum,

2 sop = 3 tuz,

4 bef = 5 tuz,

9 fot = 2 bef

Using,

2 sop = 3 tuz,

4sop = X tuz

X tuz = 4×3/2 = 13/2 = 6 tuz.

Using,

4 bef = 5 tuz,

X bef = 6 tuz

X bef = 6×4/5

X bef =24/5 = 4.8 bef

Using,

9 fot = 2 bef

X fot = 4.8 bef

X fot = 9 × 4.8/2

X fot = 21.6 fot.

Using,

1 fot = 5 vum,

21.6 fot = X vum

X vum = 5 × 21.6/1

X vum = 108 vum

Learn more about exchange rates here:

https://brainly.com/question/25970050

#SPJ1

The given question is incomplete, the complete question is:

Determine the vapor pressure (in atm) of water in an aqueous solution of 12% by mass ethylene glycol (antifreeze) if the vapor pressure of pure water at that temperature is 0.095 atmospheres.

Answer:

The correct answer is 0.091 atm.

Explanation:

Based on the given information, the mass of ethylene glycol is 12% by mass, which means 12 grams of ethylene glycol dissolved in 88 grams of water.

The moles of a substance can be determined by using the formula,

Moles = Weight/molecular mass

Number of moles of water = mass/molecular mass

= 88g/18g/mol

= 4.88 moles

Number of moles of ethylene glycol = Mass/molecular mass

= 12 grams/62g/mol

= 0.193 moles

Mole fraction of water will be,

Mole fraction = number of moles of water/Number of moles of water+Number of moles of ethylene glycol

Mole fraction = 4.88/4.88+0.193

= 0.961

Vapor pressure of water can be determined by using the formula,

Vapor pressure = Vapor pressure of pure water * Mole fraction of water

= 0.095 * 0.961

= 0.091 atm.

Answer: Electrophilic addition reaction

Explanation:

Alkenes are compounds which have at least one double bond between the carbon atoms in the molecule. This is an indication of a shortage of hydrogen atoms. The compound is said to be unsaturated. As an unsaturated compound alkene undergoes the following reaction:

-- Combustion reaction

-- Hydrogenation reaction

-- Addition reaction.

The addition reaction of alkenes occur due to the presence of pi electrons in which an electrophile attacks the carbon-carbon double bond to form the addition products. An electrophile is a molecule that has the affinity to react with other molecules containing a donatable pair of electrons.

A typical example of reaction between alkene and acid is in the decolourisation of acidified potassium tetraoxomanganate(VII) with ethene. The oxygen supplied to the reaction breaks the double bond to yield ethane 1,2 diol ( an alcohol).

The reaction of an alkene with the acid has been performed with the carbocation intermediate formation, followed by the nucleophilic substitution reaction.

The alkenes have been the hydrocarbons with the presence of one double bond in the structure. The double bond has been consisted of the pi electrons.

The alkene has been bonded with the pi-electron, thus in the chemical reaction the pi bond-breaking results in the partial negative and positive charge to the carbon atoms. The negative OH group has been the nucleophile that is attracted by the negatively charged carbon atom, and the bond formation results in the alcohol.

The reaction for an alkene with acid has been given in the image attached.

Thus, the reaction of an alkene with the acid has been performed with the carbocation intermediate formation, followed by the nucleophilic substitution reaction.

For more information about the reaction mechanism, refer to the link:

https://brainly.com/question/24924720

Answer:

n = 3.77 mol

Explanation:

Given data:

Number of moles = ?

Volume of gas = 10.0 L

Pressure = 8.91 atm

Temperature = 287.4 K

Solution:

Formula:

PV = nRT

R = general gas constant = 0.0821 atm.L/ mol.K

by putting values,

8.91 atm × 10.0 L = n × 0.0821 atm.L/ mol.K ×287.4 K

89.1 atm.L = n × 23.60 atm.L/ mol

n =89.1 atm.L / 23.60 atm.L/ mol

n = 3.77 mol

Answer:

D - Flash Disk

Explanation:

Answer: here lol

Explanation:

hope it helps just read very carefully

Answer:

pretty sure it's heterogeneous

Explanation:

Also, I saw you added me as a friend and I'm kinda curious as to why :)

Answer:

Heterogeneous mixture

Explanation:

Answer:

Al is above H on the activity series

Explanation:

The given chemical reaction is expressed as:

            2Al + 6HBr →  2AlBr₃ +  3H₂

The reaction above is a single displacement or replacement reaction and will only occur if Al is above H on the activity series.

Answer:

Explanation:

The proposed structural formula for compound A can be seen in the diagram below with its reaction mechanism. In the first SN2 reaction, we could see how anime reacts with the primary alkyl bromide since it is more reactive. However, the product derived undergoes a subsequent SN2 reaction in the second stage to produce a cyclic product.

Answer:

180

Explanation:

just multiply and round to whole number

Explanation:

Enantiomers are pairs of non-identical molecules that are non-superimposable mirror images of each other and that have at least one chiral carbon or chiral center, making them chiral compounds. They have similar chemical properties, except for when they interact with other chiral compounds.

Answer:

send a pic or more info

Explanation:

The concentration in ppm = 125,000 ppm

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

ppm or parts per million (ppm) :

For water solvent = 1 ppm ⇒ 1 mg/L(1 kg=1 L,ρ water=1 kg/L)

In percent mass = 1 ppm ⇒ 1 mg/ 1 kg

Solution contains 0.25 kg of lead in 2 kg of water :

Solvent = water = 2 kg = 2 L

Solute= lead=0.25 kg=250000 mg

So the concentration in ppm :

[tex]\tt ppm=\dfrac{250,000~mg}{2~L}=\boxed{\bold{125,000~ppm}}[/tex]

Answer:

The concentration in ppm = 125,000 ppm

Explanation:

that is why chemistry is chemistry.

Answer:

Cesium (Cs)

Explanation:

This eliment has an ionization energy of 3,8939

Answer:

180 g

Explanation:

At the end of the reaction, the mass is still expected to be 180g this is because in every chemical reaction, mass must be conserved.

According to the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed".

Answer:

They work by increasing activity in the brain, particularly in areas that help control attention and behaviour. Methylphenidate is used to treat children with attention deficit hyperactivity disorder (ADHD). It helps with hyperactivity and impulsive behaviour, and allows them to concentrate better.

Explanation:

Answer:

All of the above

Explanation:

Answer:

6

Explanation:

The coordination number of a particular crystal structure arrangement is defined as the number of nearest neighbor atoms or ions surrounding an atom or ion.

We must note that in salts of the type MX, the coordination number of each ion must be equal. The structure of LiCl is built by placing each unit cell next to another such that ions residing in the corner, edge or face sites are shared between adjacent unit cells. The LiCl is in FCC arrangement.

Hence in LiCl, each Li+ ion is surrounded by 6 chloride ions.