Please fill in the blanks to make this statement true

process by which one separates compounds from one another by passing a mixture through column that retains some compounds longer than others.

Answer:

Explanation:

The enzyme lactase acts as a catalyst to facilitate the reaction and make it happen very quickly. This enzyme is made u.

do the rest

hope it helps

Enzyme lactase catalyzes the hydrolysis of the glycosidic bond of lactose to form galactose and glucose.

Lactase can be described as an enzyme produced by many organisms. Lactase is located in the small intestine of humans and other mammals. It is essential to accomplish the digestion of milk and it breaks down lactose that gives milk its sweetness.

A person with a deficiency of lactase, and who consume dairy products, may experience the symptoms of lactose intolerance. Lactase is a part of the β-galactosidase family of enzymes and is a glycoside hydrolase involved in the hydrolysis of lactose into constituent galactose and glucose monomers.

The β-glycosidic bond in D-lactose in metabolism is hydrolyzed to form D-galactose and D-glucose, which can be absorbed into the bloodstream. The optimum temperature of the human lactase is about 37 degrees Celcius and the optimum pH of the human lactase is equal to 6.

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The question is incomplete. Here is the complete question.

Aqueous solutions of [tex]Na_{2}CO_{3}[/tex] and [tex]Ca(NO_{3})_{2}[/tex], 0.10 M each, are combined. A white precipitate is observed in the container after mixing. he precipitate is filtered andcarefully rinsed with distilled water to remove other ions. A sample of the precipitate is added to 100 mL of 0.1 M NaCl. A second sample of the precipitate is then added to 100 mL of 0.1 M HCl. What would be observed in each case?

                 Observation upon                                         Observation upon

               addition of precipitate                                  addition of precipitate

                      to NaCl(aq)                                                       to HCl(aq)

(A)     additional precipitates forms                        no visible reaction occurs

(B)     no visible reaction occurs                            gas is produced and some                                                                                        precipitate dissolves

(C)     no visible reaction occurs                             no visible reaction occurs

(D)     additional precipitates forms                       gas is produced and some

                                                                                    precipitate dissolves

Answer: (B) No visible reaction occurs; Gas is produced and some precipitate dissolves

Explanation: When aqueous solutions of [tex]Na_{2}CO_{3}[/tex] and [tex]Ca(NO_{3})_{2}[/tex] are combined, it reacts according to the following balanced equation:

[tex]Na_{2}CO_{3}+Ca(NO_{3})_{2}[/tex] → [tex]CaCO_{3}_{(s)}+2NaNO_{3}_{(aq)}[/tex]

forming calcium carbonate ([tex]CaCO_{3}[/tex]), which, as it is insoluble in water, precipitates as a solid of the color white. This process is Precipitation and this reaction is a Precipitation Reaction.

When calcium carbonate reacts with NaCl it produces:

[tex]CaCO_{3}+2NaCl[/tex] → [tex]CaCl_{2}+Na_{2}CO_{3}[/tex]

Now, calcium chloride is an inorganic compound very soluble in water, so, in this reaction, there are no precipitate and no visible reaction occurs.

When [tex]CaCO_{3}[/tex] reacts with hydrochloridric acid, the balanced reaction is

[tex]CaCO_{3}+2HCl[/tex] → [tex]CaCl_{2}+H_{2}CO_{3}[/tex]

which, also produces calcium chloride and carbonic acid.

Both are soluble in water but, when carbonic acid is in an "aqueous state", carbonic acid, it dissociates, forming carbon dioxide and water. Therefore, gas is produced and some precipitate dissolves.

In conclusion, sentence B is the correct alternative.

Answer:

[tex]m_F=234gF[/tex]

Explanation:

Hello!

In this case, given that one molecule of CF2Cl2 contains two moles of atoms of fluorine, we can set up the following dimensional analysis to compute the emitted fluorine each year by the considered car:

[tex]m_F = \frac{62gCF_2Cl_2}{1month}*\frac{12months}{1year}* \frac{1molCF_2Cl_2}{120.91gCF_2Cl_2}*\frac{2molF}{1molCF_2Cl_2} *\frac{19.0gF}{1molF} \\\\m_F=234gF[/tex]

Best regards!

Solution :

Given :

The steady state flow = 8000 [tex]$ m^3 /d $[/tex]

                                    [tex]$= 80 \times 10^5 \ I/d $[/tex]

The concentration of the particulate matter = 18 mg/L

Therefore, the total quantity of a particulate matter in fluid [tex]$= 80 \times 10^5 \ I/d \times 18 \ mg/L $[/tex]

[tex]$= 144 \times 10^6 \ mg/g$[/tex]

[tex]$= 144 \ kg/d $[/tex]

If 60 mg of alum [tex]$ [Al_2(SO_4)_3.14 H_2O] $[/tex] required for one litre of the water treatment.

So Alum required for  [tex]$ 80 \times 10^5 \ I/d $[/tex]

[tex]$= 80 \times 15^5 \ I/d \times 60 \ mg \ alum /L$[/tex]

[tex]$= 480 \times 10^6 \ mg/d $[/tex]

or 480 kg/d

Therefore the alum required is 480 kg/d

1 mg of the alum gives 0.234 mg alum precipitation, so 60 mg of alum will give [tex]$ = 60 \times 0.234 \text{ of alum ppt. per litre} $[/tex]

      [tex]$= 14.04 $[/tex] mg of alum ppt. per litre

480 kg of alum will give = 480 x 0.234 kg/d

                                        = 112.32 kg/d ppt of alum

Daily total solid load is  [tex]$= 144 \ kg/d + 112.32 \ kg/d$[/tex]

                                       = 256.32 kg/d

So, the total concentration of the suspended solid after alum addition [tex]$= 18 \ mg/L + 60 \times 0.234 $[/tex]

= 32.04 mg/L

Therefore total alum requirement = 480 kg/d

b). Initial pH = 7.4

 The dissociation reaction of aluminium hydroxide as follows :

[tex]$Al(OH)_3 \rightleftharpoons Al^{3+} + 3OH^{-} $[/tex]

After addition, the aluminium hydroxide pH of water will increase due to increase in [tex]$ OH^- $[/tex] ions.

Therefore, the pH of water will be acceptable range after the addition of aluminium hydroxide.

c). The reaction of [tex]$CO_2$[/tex] and water as follows :

[tex]$CO_2 (g) + H_2O (l) \rightarrow H_2CO_3$[/tex]

For the atmospheric pressure :

[tex]$p_{CO_2} = 3.5 \times 10^{-4} \ atm $[/tex]

And the pH is reduced into the range of 5.9 to 6.4

Ionic bonds are stronger than covalent bonds since they are of opposite charges. This makes them more attracted to each other, creating bonds that are harder to break. Covalent bonds don't have this and only occur to share electrons between atoms.

I hope this helps!

Answer:

Thorium-234 option a .......

238 4 234

U --> α + Th

92 2 90

The answer is A Thorium.

Answer:

The passage of genetic instructions from one generation to another

Explanation:

The one that is most accurate definition of heredity is the passage of genetic instructions from one generation to another. The correct option is B.

Heredity, also known as inheritance or biological inheritance, is the transmission of traits from parents to their offspring; the offspring cells or organisms acquire the genetic information of their parents through reproduction.

Genes are composed of DNA (deoxyribonucleic acid), which contains instructions for cell function as well as the characteristics that distinguish you.

Each biological parent gives you half of your genes, and you may inherit a gene mutation from one or both of your parents. Sometimes genes change as a result of problems with the DNA (mutations).

Hereditary theory holds that many physical characteristics can be passed down from generation to generation via DNA, by passing on a set of instructions or genes in DNA to offspring. You pass on the physical characteristics that you have.

Thus, the correct option is B.

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Answer:

I'd say the most reasonable answer is perspective.

Explanation:

"Point of view" is about who is telling and sharing the details in what you are writing or reading. I'm not 100% sure because the word "perspective" doesn't seem like the right word to use, but it's better than the other two in my opinion.

Answer:

Explanation:

a:)

The plant structure that provides most of the water necessary for photosynthesis is the leaves. The correct option is b.

Through a process known as photosynthesis, green plants and some other animals transform light energy into chemical energy. The main, readily available, non-recyclable component of photosynthesis is sunlight.

Plants use their roots to draw water from the soil. Water is necessary for photosynthesis, which primarily takes place in a plant's leaves, as you probably already know.

Chloroplasts, which are found in the mesophyll of the leaves, are where photosynthesis occurs. The chlorophyll in the thylakoids, which are located inside the chloroplast, absorbs the various colors of light to produce energy.

Therefore, the correct option is b. leaves.

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Answer:

True

Explanation:

If someone's genetics were Bb, B would be the dominant trait and b would be the recessive trait.

Answer:

True

Explanation:

That's how it works

Answer : The fraction represents the amount of an original sample of this element remaining after 6 days is [tex]\frac{1}{8}[/tex] .

Explanation :

Half-life = 2 days

Time = 6 days

Formula used:

[tex]N=N_o\times (\frac{1}{2})^{(\frac{t}{t_{1/2}})}[/tex]

where,

N = final amount

[tex]N_o[/tex] = initial amount

t = time

[tex]t_{1/2}[/tex] = half-life

Now putting all the given values in the above formula, we get:

[tex]N=N_o\times (\frac{1}{2})^{(\frac{6}{2})}[/tex]

[tex]\frac{N}{N_o}=(\frac{1}{2})^{(\frac{6}{2})}[/tex]

[tex]\frac{N}{N_o}=(\frac{1}{2})^3[/tex]

[tex]\frac{N}{N_o}=\frac{1}{8}[/tex]

Therefore, the fraction represents the amount of an original sample of this element remaining after 6 days is [tex]\frac{1}{8}[/tex] .

Answer: Alkali metals, halogens, noble gases

Explanation:

Ionic compounds are made of ions- charges. In LiF and NaCl, the first element has a +1 and the second element has a charge of -1. Elements that are +1 are alkali metals and elements that are -1 are halogens. Noble gases have full octets in their outermost valence shell, and since they're full it's so stable so it doesn't react with anything.

Answer:

See explanation

Explanation:

The reduction potential of Cr III is more negative than that of NH4+ hence NH4+ will be displaced by Cr III from a solution of its salt according to the following reaction equation;

Cr2(SO4)3 + 2(NH4)3PO4--------->2CrPO4 + 3(NH4)2(SO4)

Hence;

A reaction occurs when aqueous solutions of chromium(III) sulfate and ammonium phosphate are combined.

Explanation:

Geothermal energy

Explanation:

A compound is a pure substance formed by the combination of two or more kinds of atoms or elements joined together in a definite grouping.

An mixture is an impure substance made up of different types of substances.

Here are some of the differences between them;

Examples of compounds are water, sodium chloride, hydrochloric acid

                     Mixtures are air, ocean water, alloys, et.c

When two equal forces act in opposite directions the result is that the forces are balanced and there is no motion. The process of moving or changing position. When one force is stronger than the other the result is motion.

An force results when one force is stronger than other forces and the motion of an object is affected is unbalanced force.

A force is an influence in physics that can change the motion of an object. A force can cause a mass object to change its velocity, or accelerate.

The forces are balanced if the people on each side of the rope pull with equal strength but in opposite directions.

As a result, there is no movement. Forces that are in balance can cancel each other out. The object does not move when there is a balanced force.

Forces out of balance, If one force is stronger than the others and their effects do not cancel out, the forces are unbalanced. Unbalanced forces alter motion, speed, and/or direction. A greater force results in a greater change in motion.

Thus, the answer is unbalanced force.

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Answer

One of them is a Solid and one of them is a liquid and the other one is air

Explanation:

Answer:

A. Creep

Explanation:

Creep is usually defined as a mass movement process where the rock and other particles are forced to move slowly downward along a slope that is mostly covered with softer sediments and broken rock fragments. It results in the tilting of trees, poles, and gravestones.

The type of mass movement described above is a creep.

Creep movement refers to the slow downslope of different objects and/or materials that occurs on a particular slope surface.

In nature, creep movement is common to describe the slow tilt movement of different materials such as trees and poles on a hillside.

Creep movement occurs on a geological scale, ie, this movement may take hundreds of years.

In conclusion, the type of mass movement described above is a creep.

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Answer:

H+ (aq)  +    ClO- (aq)  --->   HClO(aq)  

Explanation:

The net ionic reaction equation is a chemical equation that explicitly shows only the particular ions that undergo a chemical change in the course of a given reaction.

In this particular reaction, the molecular reaction equation is shown as follows;

HNO3(aq) + NaOCl(aq) -----------> NaNO3(aq) + HOCl(aq)

Ionically;

H+ (aq)  +    ClO- (aq)  --->   HClO(aq)

Answer: The volume of tetrahydrofuran the student should pour out is 33.7 ml

Explanation:

Density is defined as the mass contained per unit volume.

[tex]Density=\frac{mass}{Volume}[/tex]

Given : Mass of tetrahydrofuran = 30.0 grams

Density of tetrahydrofuran = [tex]0.889gcm^{-3}[/tex]

Putting in the values we get:

[tex]0.889gcm^{-3}=\frac{30.0g}{Volume}[/tex]

[tex]Volume=\frac{30.0g}{0.889gcm^{-3}}=33.7cm^3=33.7ml[/tex]      [tex](1cm^3=1ml)[/tex]

Thus volume of tetrahydrofuran the student should pour out is 33.7 ml

Answer:

0.0457M is molarity of nitrate anion in the solution.

Explanation:

Molarity is defined as the ratio between moles of solute (In this case, nitrate ion) and liters of solution (The total volume of the solution is 300.0mL = 0.300L).

Thus, we need to convert mass of Lead(II) nitrate to moles using its molar mass (Molar mass Pb(NO₃)₂: 331.2 g/mol). Moles of Pb(NO₃)₂ = 1/2 Moles of NO₃⁻:

Moles Pb(NO₃)₂ and moles of NO₃⁻:

2.27g * (1mol / 331.2g) = 0.006854 moles Pb(NO₃)₂ * (2moles NO₃⁻ / 1mol Pb(NO₃)₂) = 0.0137moles NO₃⁻

Molarity is:

0.0137 moles NO₃⁻ / 0.300L =

Answer:

H2SO4 + 2KOH -------> K2SO4 + 2H2O

Explanation:

Answer:

Thermal

Explanation:

I think im not quite sure but since thermal is basically heat energy, I assume it would be thermal energy

Answer:

7 neutrons

Explanation:

Answer:

I believe it's chemical

Answer:

physical

Explanation:

it's not changing form or substance