In an experiment magnesium ribbon was heated in air. The product was found to be heavier than the original ribbon. Potassium manganate 7 was on the other hand, heated in air and product formed was to be lighter. Explain the difference on the observation made

The match up  of the left to the right column is;

1. Asteroid - A) varies greatly in size from one to the next

2. Gas Giant - B)atmosphere is primarily made of hydrogen and helium

3. Comet- C) has a characteristic glow

4. Meteoroid - D) usually burns up if it enters the earth's atmosphere

An asteroid is known to be a kind of a small rocky object that is said to often orbits the Sun.

Note that an meteor is  known or regarded as what occurs if ]a small piece of an asteroid or comet, known to be a meteoroid, burns up when they enter Earth's atmosphere.

Learn more about Meteoroid from

https://brainly.com/question/15433432

#SPJ1

Answer:

edmentum :)

Explanation:

36.38 ml of a 0.167 M potassium hydroxide solution is required to neutralize 16.6 mL of a 0.366 M nitric acid solution.

Given that 16.6 mL of a 0.366 M nitric acid solution is neutralized by 0.167 M potassium hydroxide solution.

The balanced equation for the reaction is:

HNO₃ + KOH → KNO₃ + H₂O

From the equation given above,

Mole ratio of the acid, HNO₃ (nA) = 1

Mole ratio of the base, KOH (nB) = 1

From the question:

Molarity of the acid, HNO₃ (Ma) = 0.366 M

Volume of the base, KOH (Vb) =

Molarity of the base, KOH (Mb) = 0.167 M

Volume of the acid, HNO₃ (Va) = 16.6 ml

Now,

MaVa/ MbVb = nA/nB

0.366 × 16.6 / 0.167 × Vb = 1/1

6.0756 = 0.167 × Vb

Vb = 36.38 ml

Therefore, 36.38 ml of potassium hydroxide solution is required for the reaction.

To know more about Potassium Hydroxide refer to:

https://brainly.com/question/16990731

#SPJ4

When a suitable alkyl halide is treated with a nucleophile, a substitution reaction can occur in which the leaving group is replaced by a nucleophile.

In an elimination reaction , hydrogen halide is removed and a leaving group is expelled, giving an alkene.

Learn more about nucleophiles here..

https://brainly.com/question/17685037

#SPJ4

Answer:

See below

Explanation:

9 m * 2.16 kg/ m = ___________ kg    ( see how the 'm' cancels out?)

How much hydrogen chloride acid was used?

72.916 g of hydrochloric acid was used.

Given:

Mass of Zn = 65.39 g

Mass of [tex]ZnCl_{2}[/tex] =136.29 g

Mass of [tex]H_{2}[/tex] = 2 g

Equation:

The chemical equation for the reaction of zinc with hydrochloric acid:

Zn + 2HCl → Zn [tex]Cl_{2}[/tex] + [tex]H_{2}[/tex]

Hydrogen gas is created when zinc combines with hydrochloric acid, which causes the process to bubble ferociously. Another sign that a chemical reaction is taking place is the generation of a gas.

Calculation:

A number of equivalents equate:

Number of equivalents = [tex]\frac{given mass}{Molecular Mass}[/tex] x 1000 x equivalent factor

[tex]\frac{x}{36.458}[/tex] x 1000 x 1 = [tex]\frac{136.29}{136.286}[/tex] x 1000 x 2

[tex]x[/tex] = 36.458 x 2

[tex]x[/tex] = 72.916

Learn more about the calculation of mass here,

https://brainly.com/question/21290034

#SPJ4

The shape allows the flask to be sealed with a bung for heating purposes, while also allowing a researcher the freedom to shake or stir the flask without spilling liquid.

Explanation:

Hyperconjugation is the interaction between bonds in organic compounds.

Hyperconjugation is the relationship or interaction that exist between multiple bonds molecules and single bond molecules in organic compounds.

Therefore, Hyperconjugation is the interaction between bonds in organic compounds.

Learn more about hyperconjugation below.

https://brainly.com/question/26839900

#SPJ1

65 * 10^3 CFU's per milliliter of water.

CFU stands for a colony-forming unit. which means that cfu/g is a colony-forming unit in line with gram and CFU/ml is a colony-forming unit in step with milliliter. A colony-forming unit is where a colony of microbes grows on a petri dish, from one unmarried microbe.

Colony Forming devices are a time period from Microbiology. CFU offers an indication of the quantity of residing microorganisms in a liquid. This quantity, determined with the aid of counting the individual colonies, describes the number of cells of organisms within the water, which can be capable of multiplying.

Whilst you do plate be counted of micro organism you are making serial suspension dilution in saline buffer or any other diluent, and then you plate a sure quantity (one hundred microliters on a 9cm Petri plate) you unfold and incubate and then you definitely depend on the range of colonies shaped.

Learn more about colony-forming units here https://brainly.com/question/16943523

#SPJ4

Answer:

A carcinogen is any substance that promotes carcinogenesis, which is a type of deadly cancer to humans so essentially you are asking why a cancer-causing substance is dangerous...

Carcinogens cause genetic abnormalities that become tumors. So I suppose they are really dangerous because they heavily increase the likelihood of developing cancerous tumors :)

Answer:

Carcinongens usually can cause the change in the genetic information (DNA) which leads to mutation. The mutation can make the organs out of control of reproduction and cause cancer.

Explanation:

Carcinogens can be chemicals, or anything that induce cancer.

Strecker synthesis of amino acids:

Aldehyde and ketone are the functional groups that react to form the imine intermediate in the Strecker synthesis of amino acids.

Method of Strecker synthesis:

A method for synthesizing amino acids by the reaction of an aldehyde with ammonia in the presence of potassium cyanide is known as the Strecker amino acid synthesis. α-aminonitrile is produced by the condensation reaction, and this α-aminonitrile is then hydrolyzed to produce the required amino acid. The technique is applied commercially to make racemic methionine from methional.

Although primary and secondary amines also produce substituted amino acids, using ammonium salts only produces unsubstituted amino acids. Similar to this, using ketones in place of aldehydes results in amino acids that are α,α-disubstituted.

Reaction mechanism:

An aldehyde's carbonyl oxygen is protonated in the first phase of the reaction, which is followed by an ammonia nucleophilic attack on the carbonyl carbon. Water is separated from the intermediate iminium ion after a second proton exchange. The iminium carbon is then attacked by a cyanide ion, resulting in an aminonitrile.

The aminonitrile's nitrile nitrogen is protonated in the second step of the Strecker Synthesis, and a water molecule attacks the nitrile carbon. Proton exchange and a nucleophilic attack of water on the former nitrile carbon are followed by the formation of a 1,2-diamino-diol. The protonation of the amino group is then followed by the elimination of ammonia, and eventually, the deprotonation of a hydroxyl group results in the production of amino acids.

Learn more about amino acids here,

https://brainly.com/question/15687833

#SPJ4

Answer:

D.) electrons are gained and lost.

Explanation:

Redox reactions involve the change in oxidation states of the reactants. Oxidized molecules lose electrons whereas reduced molecules gain electrons. In redox reactions, the oxidation number of oxidized molecules decreases and increases in reduced molecules.

An enzyme is an organic catalyst that can bind to nearly any molecule is an organic catalyst increases the activation energy of a reaction is an inorganic catalyst is a source of energy for endergonic reactions

Enzymes are substances that act as catalysts for living organisms and regulate the rate at which chemical reactions take place without a change in the process. The biological processes that occur in all living organisms are chemical reactions, most of which are controlled by enzymes.

Enzyme functions as an organic catalyst. A catalyst is a chemical that participates in a chemical reaction but is not modified by it. Many enzymes work by lowering the activation energy of the reaction.

Enzymes are called biocatalysts because they speed up the biochemical reactions of living organisms. Enzymes are called biocatalysts because they promote chemical reactions without changing the equilibrium state.

Learn more about Enzymes here:https://brainly.com/question/1596855

#SPJ4

0.03 g of ethylene glycol (C2H6O7) must be added to 1.00 kg of water to produce a solution that freezes at -5.00C.

[tex]\Delta T_{f} = K_{f} m[/tex]

where,

ΔTf = Change in freezing point

Kf = molal freezing point depression constant of the solvent

m = moles of solute per kilogram of solvent.

Now,

[tex]\Delta T_{f} = K_{f} m[/tex]

[tex]\Delta T_{f} = K_{f} \times \frac{W_2}{M_2} \times \frac{1000}{W_1}[/tex]                 [-5.00°C = 273 + (-5.00) = 268 K] [tex]268 = 1.86 \times \frac{W_2}{62} \times \frac{1000}{0.001}[/tex]                 [1.00 kg = 0.001 g]

[tex]W_{2} = \frac{268 \times 62 \times 0.001}{1000 \times 1.86}[/tex]

     = 0.03 g

Thus from the above conclusion we can say that 0.03 g of ethylene glycol (C2H6O7) must be added to 1.00 kg of water to produce a solution that freezes at -5.00C.

Learn more about the Freezing Point Depression here: https://brainly.com/question/24314907

#SPJ4

The age of the remnants is calculated as 3807 years.

The half life is the time taken for only half of the number of the radioactive atoms to remain.

Half life of carbon - 14 = 5730 years.

Initial count rate = 8.0 counts per minute per gram

Count rate at time t =  12.7 counts per minute per gram of carbon

Since;

0.693/t1/2 =2.303/t log (N/No)

0.693/5730 = 2.303/t log (12.7/8)

1.21 * 10^-4 = 2.303/t * 0.2

t = 2.303 * 0.2/1.21 * 10^-4

t = 0.4606/1.21 * 10^-4

t = 3807 years

Learn more about carbon-14:https://brainly.com/question/4206267

#SPJ1

M₁V₁=M₂V₂

M₁ x 10 = 0.2 x 14

M₁ = 0.28

Answer:

cl2 - 1 bond

HCl.- 1 bond

N2 - 3 bond

o2 - 2 bond

The concentration of the solution in units of molarity is 0.64 M and the concentration of the solution in terms of g/mL is 0.10976 g/mL.

The measure of the amount of the solute dissolved in the given amount of the solvent or solution is said to be the concentration of the solution.

It is given by the expression,

Concentration of the solution = mass of the solute/total volume of the solution

Units: g/mL

The concentration of the solution in units of molarity is given by the expression,

Molarity = (no. of moles of the solute)/(Volume in L)

Units: moles/L

It is given that the solute is barium hydroxide - Ba(OH)₂

The mass of Ba(OH)₂ = 2.81 g

When in dissolved in water, the total volume of the solution = 25.6 mL

The molar mass of Ba(OH)₂ = 171.34 g/mol

Then,

No. of moles = (mass of Ba(OH)₂)/(molar mass of Ba(OH)₂)

i.e.,

No. of moles = [tex]\frac{2.81}{171.34}[/tex] = 0.0164 mole

Concentration = mass of the solute/total volume

I.e., C = [tex]\frac{2.81}{25.6}[/tex] = 0.10976 g/mL

Then the concentration of the solution in units of molarity is,

Molarity = (no. of moles)/(Volume of the solution in L)

⇒ Molarity = [tex]\frac{0.0164}{25.6/1000}[/tex] = 0.64 M

Therefore, the concentration of the solution in units of molarity is 0.64 M.

Learn more about molarity here:

https://brainly.com/question/26873446

#SPJ4

Answer:

5 mg

Explanation:

If one half life is 4 hours, then 3 half lives is 12 hours.

This means that the sample will decay to 1/8 of its original amount.

So, the answer is 40(1/8) = 5 mg.

Aldehyde are oxidized to carboxylic acids with the Tollen's Reagent which is an oxidizing agent that contains silver oxide and aqueous ammonium hydroxide.

An Aldehyde is a functional group which contains the carbonyl group that is -C=O. The structure for aldehyde is R¹ - C = O - R² where R¹ and R² = H.

Example of Aldehyde is Methanal. The structure of Methanal is H - C = O - H.

Tollens's Reagent is a classical reagent which is widely used in the detection of an aldehyde functional group, an alpha hydroxy ketone functional group and an aromatic aldehyde group in a given test substance.

Thus from the above conclusion we can say that Aldehyde are oxidized to carboxylic acids with the Tollen's Reagent which is an oxidizing agent that contains silver oxide and aqueous ammonium hydroxide.

Learn more about the Tollen's Reagent here: https://brainly.com/question/13833774
#SPJ4

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: _________  are oxidized to carboxylic acids with the ________ which is an oxidizing agent that contains silver oxide and aqueous ammonium hydroxide.

Well, the answer is the 4rth one "

50°C"

Answer:

1

Explanation:

1.04/MM = 1.04/39.09 = 0.0266 potassium moles

0.7/MM = 0.7/52 = 0.0133 chromium moles

0.86/MM =0.86/16 = 0.05375 oxygen moles

divide all the moles number by the lowest

0.0266/0.0133=2

0.0133/0.0133=1

0.05375/0.133=4

so the empirical formula is K2CrO4

Answer:

9% solution by mass

Explanation:

If there is 500 gm of solution and 45 g of it is glucose then:

45/500 * 100% = 9 % solution

175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.

Hence, Option (B) is correct answer.

Concentration is defined as the measure of how much substance there is mixed with another substance.

To find the concentration use the dilution formula

C₁V₁ = C₂V₂

where,

C₁ = Concentration of starting solution

C₂ = Concentration of final solution

V₁ = Volume of the starting solution

V₂ = Volume of the final solution

Now put the values in above formula we get

C₁V₁ = C₂V₂

1.6 × 0.175 = C₂ × 1.0

0.28 = C₂ × 1.0

C₂ = 0.28

Thus from the above conclusion we can say that 175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.

Hence, Option (B) is correct answer.

Learn more about the Concentration here: https://brainly.com/question/17206790

#SPJ1

The standard free energy change (∆Gº') is the energy released when the products are created from the reactants. The (∆Gº') at 298 K is -5.40kJ.

The standard free energy change is given by the sum of the standard free energies of the products subtracted from the sum of the standard free energies of the reactants, given as,

ΔG = ∑nΔG°products − ∑mΔG°reactants

Given,

ΔG°(NO₂) = 51.84 kJ/mol

ΔG°(N₂O₄) = 98.28 kJ/mol

Substituting values:

ΔG = ∑nΔG°products − ∑mΔG°reactants

= ΔG°(N₂O₄) − 2ΔG°(NO₂)

= 98.28 − 2(51.84)

= - 5.4

Therefore, -5.40 kJ is the standard free energy.

Learn more about standard free energy here:

https://brainly.com/question/20351258

#SPJ1

Six-membered cyclic hemiacetals and five-membered cyclic hemiacetals are called, respectively mannoses and xyloses.

Cyclic hemiacetals are those molecules that contain both alcohol and a carbonyl group and can undergo an intramolecular reaction to form a cyclic hemiacetal.

Example of Cyclic hemiacetals are :

Learn more about xyloses here:

https://brainly.com/question/9873867

#SPJ1

Six-membered cyclic hemiacetals and five-membered cyclic hemiacetals are called, respectively, pyranoses and furanoses.

Hemiacetals are chemical compounds containing hydrogen or organic substituents in their molecules and formed by aldehydes or ketones.

The chemical formula of these hemiacetals compounds may be depicted as RHC(OH)OR'.

In conclusion, six-membered and five cyclic hemiacetals are pyranoses and furanoses.

Learn more about Hemiacetals here:

https://brainly.com/question/15556232

#SPJ1

Answer:

A

Explanation:

when technology has created something for which we don't have an ethical framework is called ethical vacuum .

Answer: A

Explanation: A is the correct answer because when technology has created something in which we do not have an ethical framework yet its a called a vacuum.

steps that are followed in taking a stratified random sample are

i. Take a sample of size n/k from each strata, where n is the sample size and k is the number of strata

iv. Take a systematic sample from the population as a whole. Take random samples from each strata.

Stratified random sampling is a sampling method that divides the population into smaller groups called layers. Groups or hierarchies are organized based on the common characteristics or attributes of the members in the group. The process of dividing the population into groups is called hierarchization.

Stratified Random Sample Example:

Suppose a research team wants to determine a GPA for a college student in the United States. The research team is having a hard time collecting data from all 21 million college students. We decided to use 4,000 students to extract a random sample of the population.

Learn more about  stratified random sample here: https://brainly.com/question/24466382

#SPJ4

The Actual yield of a chemical reaction shows the amount of product actually made

Actual yield in a chemical reaction is the exact amount of products that is produced in a chemical reaction other than the expected amount of products ( theoretical yield ) from the chemical reaction.

Hence we can conclude that the actual yield of a chemical reaction shows the amount of product actually made.

Learn more about actual yield : https://brainly.com/question/14966377

#SPJ1

Answer:

B.) Atom economy

Explanation:

Got it right on founders edtell

The measurements which are listed in the proper mathematical relationship include:

This is used in mathematical expressions and has a constant value which doesn't change in expression.

Options A,B and C have the appropriate constants as pressure is usually multiplied by volume.

Read more about Constant here https://brainly.com/question/15989275

#SPJ1

The new pressure of the gas is 4.95 atm.

Boyles law states that the volume of a given mass of gas is inversely related to its pressure at constant temperature.

Given that;

V1 = 1.50 L

V2 = 0.50 L

P1 = 1.65 atm

Then;

P1V1 = P2V2

P2 =  1.65 atm *  1.50 L/ 0.50 L

P2 = 4.95 atm

The new pressure of the gas is found to be 4.95 atm.

Missing parts:

a balloon filled with a volume of 1.50 L is compressed to a volume of 0.50 L at a constant rate of temperature. if the initial pressure of the gas inside the balloon was 1.65 atm what is the new pressure?

Learn more about Boyles law:https://brainly.com/question/22027561

#SPJ1