Please help me with this question

Answer:

Triacylglycerols (triglycerides) are non-polar or hydrophobic molecules

Glycerophospholipids (phosphoglycerides) are polar or hydrophilic

Explanation:

Triacylglycerides (TGs) are esters synthesized by the esterification of three molecules of glycerol and fatty acid, and this is essentially by the replacement of the three hydroxyl groups on glycerol with three fatty acids. This removes the hydrophilic property from the glycerol molecule hence TGs are only soluble in non-polar solvents like alcohol and benzene, and TGs are therefore the storage forms of fats in adipose tissues.

Glycerophospholipids are formed by the addition of two hydrophobic fatty acid groups and one phosphoric acid (phosphate group) to glycerol (alcohol) leaving a hydrophilic head (phosphate end) and a hydrophobic tail (fatty acid ends). This amphipathic property of this molecule makes it a suitable molecule for membrane structures, especially of cells (lipid bi-layer), with an arrangement where the hydrophilic side interacts with the aqueous environment, while the hydrophobic side makes contact with the non-aqueous environment.

Triacylglycerols-

Glycerophospholipids-

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Answer:

A. star formation begins in a nebula.

Explanation:

Answer:

6 oxygens on the product side

Explanation:

1) balance the equation:

C2H4 + 3O2 → 2CO2 + 2H2O

2) calculate the number of oxygens on the product side

2CO2=4

2H2O=2

According to the law of conservation of mass, there are 6  atoms of oxygen in the product of this reaction.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.

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Answer:

You have to apply the base to an acid burn and vice versa.

Explanation:

If acid or base is spilled on the skin, immediately wash the affected area gently with lukewarm water and get medical attention immediately. Therefore, option (D) is correct.

Exposure to strong acids or bases such as sulphuric acid can take place as skin contact, inhalation of vapors, or ingestion. Each type of exposure can rise serious hazards to health and must be managed quickly and reduce damage and health risks appropriately by medical professionals.

If acid comes into contact with the skin, quickly wash the affected area gently with cold water and seek medical attention immediately. If acid or base gets into your eyes, then flush the eyes with water.

If accidentally ingest strong acid or base, rinse your mouth immediately with water and continually rinse your mouth with water. If you inhale acid or base aerosols, breathe fresh air, and get medical attention immediately.

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Answer:

the sucrose mass is 264.g

Explanation:

The computation of the sucrose mass is shown below;

The Molar mass of [tex]C_{12}H_{22}O_{11}[/tex] is  342.3 g/mol

And, the molar mass of [tex]H_2O[/tex] is 18g/mol

The mass of [tex]C_{12}H_{22}O_{11}[/tex] be Y

Now

The moles of [tex]C_{12}H_{22}O_{11}[/tex] is

= Mass of [tex]C_{12}H_{22}O_{11}[/tex] ÷  molar mass of [tex]C_{12}H_{22}O_{11}[/tex]

= Y ÷ 342.3 mol

And,

The moles of [tex]H_2O[/tex] is

= Mass of [tex]H_2O[/tex] ÷  molar mass of [tex]H_2O[/tex]

= 100.0 ÷ 18

= 5.56mol

Now

The molar fraction of [tex]C_{12}H_{22}O_{11}[/tex] is

= Moles of [tex]C_{12}H_{22}O_{11}[/tex] ÷  (moles of[tex]C_{12}H_{22}O_{11}[/tex] + moles of [tex]H_2O[/tex])  = 0.124

= (Y ÷ 342.3) ÷ [(Y ÷ 342.3) + 5.56] = 0.124

Y ÷ 342.3 = 0.124 × [(Y ÷ 342.3 + 5.56]

Y = 0.124 × Y + (0.124 × 5.56 × 342.3)

Y = 269.4 g

hence, the sucrose mass is 264.g

Answer:

The formula for sucrose is

C12H22O11

moles sucrose = mass / molar mass  

= 6.0 g / 342.30 g/mol

= 0.017528 mol

the formula shows that each sucrose molecule has 22 H atoms

so moles H = 22 x moles sucrose

= 0.3856 mol

mass H = molar mass x moles

= 1.008 g/mol x 0.3856 mol

= 0.3887 g

= 0.39 g ( 2 sig figs)

Answer:

Divergent boundary plate

Explanation:

I hope this helps but this question has its answer at the top of google when you search it

Question:

A mid-ocean ridge occurs at what boundary?

1. Convergent Boundary Plate

2. Divergent  Boundary Plate

3. Transform Boundary Plate

Answer:

2. Divergent Boundary Plate

Answer:

is it from bleacH?

Explanation:

hazardous

Answer:

halogen family

Explanation:

A heater is placed under one corner of a water bed mattress. Warm water moves throughout the mattress because of convection. The correct option is B.

Heat is transferred through convection, which is the large-scale movement of molecules inside gases and liquids.

Conduction is used to move heat from the object to the fluid initially, but fluid motion is responsible for the bulk of the heat transfer.

When heat is transferred from your body by moving air, convection takes place. The air will rise if it absorbs your heat and is cooler than the environment.

Cooler air moves in to take its place and absorb more of your warmth as the warmed air rising around you increases. You feel cooler as this air moves more quickly.

Thus, the correct option is B.

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Answer:

pH at the equivalence point is 8.6

Explanation:

A titulation between a weak acid and a strong base, gives a basic pH at the equivalence point. In the equivalence point, we need to know the volume of base we added, so:

mmoles acid = mmoles of base

60 mL . 0.1935M = 0.2088 M . volume

(60 mL . 0.1935M) /0.2088 M = 55.6 mL of KOH

The neutralization is:

HBz + KOH  ⇄  KBz  +  H₂O

In the equilibrum:

HBz + OH⁻   ⇄  Bz⁻  +  H₂O

mmoles of acid are: 11.61 and mmoles of base are: 11.61

So in the equilibrium we have, 11.61 mmoles of benzoate.

[Bz⁻] = 11.61 mmoles / (volume acid + volume base)

[Bz⁻] = 11.61 mmoles / 60 mL + 55.6 mL = 0.100 M

The conjugate strong base reacts:

  Bz⁻  +  H₂O  ⇄  HBz + OH⁻    Kb

0.1 - x                       x        x

(We don't have pKb, but we can calculate it from pKa)

14 - 4.2 = 9.80 → pKb  → 10⁻⁹'⁸ = 1.58×10⁻¹⁰ → Kb

Kb = [HBz] . [OH⁻] / [Bz⁻]

Kb = x² / (0.1 - x)

As Kb is so small, we can avoid the quadratic equation

Kb =  x² / 0.1 → Kb . 0.1 = x²

√ 1.58×10⁻¹¹ = [OH⁻] = 3.98 ×10⁻⁶ M

From this value, we calculate pOH and afterwards, pH (14 - pOH)

- log [OH⁻] =  pOH → - log 3.98 ×10⁻⁶  = 5.4

pH = 8.6

Answer:

true

Explanation:

Answer:

[K₂CrO₄] → 8.1×10⁻⁵ M

Explanation:

First of all, you may know that if you dilute, molarity must decrease.

In the first solution we need to calculate the mmoles:

M = mmol/mL

mL . M = mmol

0.0027 mmol/mL . 3mL = 0.0081 mmoles

These mmoles  of potassium chromate are in 3 mL but, it stays in 100 mL too.

New molarity is:

0.0081 mmoles / 100mL = 8.1×10⁻⁵ M

Answer:

carbon dioxide in the atmosphere

Explanation:

Carbon dioxide in the atmosphere is the major cause of greenhouse effect.

Greenhouse effect is the main cause of global warming.

Answer:

8 hours 20 minutes

Explanation:

Answer:

A. flooding

Explanation:

At high elevations air becomes thinner so a person may not be receiving enough oxygen which can cause dizziness. Flooding typically happens at sea level.

Explanation:

i think 3x10^5

hope this helps if not sorry

Answer:

E = 2.05×10⁻²³ J

Explanation:

Given data:

Wavelength of transmission = 9.7 mm (9.7/1000 = 0.0097 m)

Energy of transition = ?

Solution:

9.7 mm (9.7/1000 = 0.0097 m)

9.7×10⁻³ m

Formula:

E = hc/λ

By putting values,

E = 6.63 ×10⁻³⁴ Js × 3×10⁸ m/s / 9.7×10⁻³ m

E = 19.89×10⁻²⁶ J.m / 9.7×10⁻³ m

E = 2.05×10⁻²³ J

Answer:

reduce water loss  

absorb sunlight

take in carbon dioxide

produce oxygen

Explanation:

i think

Answer:

A, D, and E

Reduces water loss, take in carbon dioxide, and produce oxygen.

Explanation:

Answer:

FeCl₂ · 6H₂O = 234.75 g/mol

Explanation:

Iron (II) = Fe²⁺

Number between () indicates the oxidation state

Chloride = Cl⁻

Iron (II) chloride = FeCl₂

If we say hexahydrate, it means that our salt is hydrated by 6 molecules of water.

FeCl₂ · 6H₂O = Iron(II) chloride hexahydrate

Molar mass is = 55.85 g/mol + 35.45 g/mol . 2 + 6 . 18g/mol  = 234.75 g/mol

We have just summed molar mass of Fe, plus Cl (x2), plus 6 H₂O

Answer: i dont no

Explanation:

ddd

Answer:

I want to say option C: Testing which surfa e is easier to slide a wooden block across.

Explanation:

I'm not 100 % sure though with my answer. I'm truly so very sorry if my answer is wrong. I tried my best.

In physics, friction is said to be the opposing force that resists any object. Testing which surface is more effortless to slide a block across can be used to investigate friction. Thus, option c is correct.

Friction has been defined as the resisting force that opposes the movement of objects across the surface. It can also be said as a force that opposes the relative motion of an object.

The friction can be rolling, sliding, fluid, or static depending on the surface and type of object. The frictional force is present only when the object has been in contact of the surface body.

When a surface is tested for sliding the wooden block, then the sliding friction has been used. It is possible as the resistant force of the surface with respect to the block is taken into the consideration.

Therefore, option C. the surface testing for sliding wooden blocks involves friction.

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Answer:

60 meters

Explanation:

Answer:

D. TTACGCCAGG. that would be your answer.

Answer:

i think its either A TTGTACCTCC or D TTACGCCAGG

Explanation:

Answer:

C.

Explanation:

Answer:

Empirical formula: CH₃O

Molecular formula: C₂H₆O₂

Explanation:

All carbon is converted in CO2 and all hydrogen in H2O. Thus, we can find mass of each element and, by subtracting, the mass of Oxygen:

Mass C:

10.52g CO2 * (1mol / 44g) = 0.239 moles CO2 = Moles C * (12.01g / mol) =

2.87g C

Mass H:

6.460g H2O * (1mol / 18g) = 0.359 moles H2O * 2 = 0.718 moles H * (1g / mol) =  

0.718g H

Mass O:

7.417g Sample - 2.87g C - 0.718g H =

3.829g O

Now, we can determine empirical formula defined as the simples whole number ratio of atoms present in a compound with moles of each atom:

Moles C: 0.239 moles C

Moles H: 0.718 moles H

Moles O: 3.829g * (1mol / 16g) = 0.239 moles O

The ratio of moles of each atom divided in moles of oxygen:

C: 0.239 mol / 0.239 mol = 1

H: 0.718 mol / 0.239 mol = 3

C: 0.239 mol / 0.239 mol = 1

The molar mass of CH3O is:

12.01g/mol + 1g/mol*3 + 16g/mol =

31.01g/mol

That means molecular formula is twice empirical formula because its molecular mass is 31.01g/mol * 2 = 62.02g/mol ≈ 62.07g/mol