Objects in the universe vary in their composition. Which of the following best describes the composition of a galaxy?

Answer:

If we can only choose one I would choose the last one

Answer:

The last one

Explanation:

because compounds are made up of two atoms chemically joined together.

Washing it with sodium carbonate can lessen the organic layer's solubility in the aqueous layer. The organic layer can be separated more easily as a result.

C4H10O + 24NaHCO3 → 28CO2 + 17H2O + 24Na

A popular reagent with the chemical formula NaHCO3 is sodium bicarbonate, sodium hydrogen carbonate, bicarbonate of soda, or "baking soda." Sodium bicarbonate is an amphoteric molecule that often takes the form of a fine white powder or tiny crystals. It can function as both an acid and a base in distinct chemical reactions, though it is typically thought of as a base.

Carbon dioxide can be bubbled into a concentrated sodium carbonate solution to produce sodium bicarbonate. Filter and let the sodium bicarbonate precipitate air dry after cooling the solution till it does. Because sodium bicarbonate decomposes beyond 50 °C, do not boil the bicarbonate solution.

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1 Hydrochloric acid and pepsin digest protein  the stomach. The stomach squeezes to mix food.  - match to  c

2   Nutrients are absorbed into the blood by villi in the small intestine. - match to a

3 Water is absorbed by from the food waste back into the body.  -match to i

4 The tongue pushes food to the back of the mouth where it is swallowed.  - matches to  j

5   Food is chopped and ground in the mouth. - match to f

6 Bile (produced by the liver and stored in the gallbladder) enters the small intestine to break down fats. - matches to e

7  Solid waste material is forced out of the body. - matches to  g

8  "Food" moves to the small intestine (through the duodenum - matches to  b

9  Waste (food) leaves the small intestine and enters the large intestine. - matches to h

10 The food moves along the esophagus to the stomach - matches to  d

The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion.

The Digestion of food  involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body.

This digestion process have been described above in matching order.

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Answer:

225kg.m.s

Explanation:

Momentum equals to mass times velocity

The four main components of a modern detergent are builders (50% by weight), surfactants (15%), bleach (7%), and enzymes (2%).

A detergent can be described as a surfactant or a mixture of surfactants with cleansing properties in dilute solutions. These substances are similar to soap but are more soluble in hard water due to the polar sulfonate is less likely than the polar carboxylate of soap to bind ions in hard water.

Builders are water softeners and their anions react with cations to form insoluble compounds which precipitate onto fabrics and washing machines and which are hard to remove.

Surfactants provide absorption and emulsification of soil into the water and also by reducing the surface tension of water to improve wetting.  The main function of bleaches is oxidizable organic stains, which are usually of vegetable origin.

Enzymes are needed to degrade stubborn stains composed of proteins, fats, starch, and cellulose.

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70.9-gram sample of \(Cl_{2}\) gas will occupy Opton C. 22.4 liters at STP.

To determine the volume occupied by the sample of \(Cl_{2}\) (g) at STP, we can use the ideal gas law equation, PV = nRT

where P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature.

At STP (Standard Temperature and Pressure), the pressure is 1 atmosphere (atm) and the temperature is 273.15 Kelvin (K).

First, calculate the number of moles of \(Cl_{2}\) (g) using its molar mass. The molar mass  \(Cl_{2}\) is 70.9 grams/mol.

Number of moles (n) = mass (m) / molar mass (M)

n = 70.9 g / 70.9 g/mol

n = 1 mol

Now, we can calculate the volume using the ideal gas law:

V = (nRT) / P

V = (1 mol * 0.0821 L·atm/mol·K * 273.15 K) / 1 atm

V ≈ 22.4 L

Therefore, the correct answer is C. 22.4 L.

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If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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Answer:

A solid's particles fit closely together. The forces between the particles are so strong that the particles can not move freely; they can only vibrate. This causes a solid to be a stable, non-compressible shape with a definite volume.

Explanation:

I honestly don't know if that's right...

A resting membrane has a negative charge because more potassium ions diffuse out of the cell than sodium ions diffuse in.

By raising the concentration of cations outside the cell (in the extracellular fluid) in comparison to inside the cell, the negative resting membrane potential is established and sustained (in the cytoplasm).

The pump changes in shape as a result of phosphorylation, reorienting itself to open toward the extracellular area. Due to the pump's altered preference for binding to sodium ions, the three sodium ions are ejected from the cell (has a low affinity for them).

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Answer:

C3H8 would be your limiting reactant.

Explanation:

The limiting reactant in a reaction is the substance you have the least of. It ends, or limits, the reaction when it runs out.

The first step in this calculation is to know how many liters is equal to 1 gallon, and the value is 3.785 liters, so now we have to make the following calculation:

1 gal = 3.785 Liters

30.0 gal = x Liters

x = 3.785 * 30.0

x = 114 Liters

Explanation:

Metallic bond, force that holds atoms together in a metallic substance

Answer:

hope this helps

Explanation:

Water was on earth with the dinosaurs and almost at the very start.

Water starts anywhere from clouds to ponds

I choose ponds, water evaporates from the sun and moves its way through the air being collected into clouds in the atmosphere, clouds are evaporated water molecules, then the water combines to form rain wich then end up on a hill and travel back to a water source or goes into the ground and makes groundwater and if there is enough rain overtime will form a pond.

(d) greenhouse effect

The gas having the weakest London (dispersion) forces is the a nonpolar gas that has a low relative molecular mass.

The London dispersion forces occur in all substances. However, they are the dominant interaction non-polar substances.

Since the gases were not indicated in the question, I wish to explain to you that generally, gases having a low relative molecular mass and are non-polar will have the least london (dispersion) forces under the same conditions of temperature and pressure.

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Answer:

9

Explanation:

Given parameters:

    what is  b² - 4ac  of

 Equation x² - 5x + 4 = 0

Solution:

    x² - 5x + 4 in the form ax + bx + c = 0

  a is the coefficient of x²  = 1

                                      b = -5

                                      c = 4

Input the parameters and solve;

   b² - 4ac = -5² - 4(1)(4)

                 = 25 - 16

                  = 9

Answer:

The volume will also decrease.

Explanation:

This illustration clearly indicates Boyle's law.

Boyle's law states that the volume of a fixed mass of gas is directly proportional to the absolute temperature, provided the pressure remains constant. Mathematically, it is represented as:

V & T

V = KT

K = V/T

V1/T1 = V2/T2 =... = Vn/Tn

Where:

T1 and T2 are the initial and final temperature respectively, measured in Kelvin.

V1 and V2 are the initial and final volume of the gas respectively.

From the illustration above, the volume is directly proportional to the temperature. This implies that as the temperature increases, the volume will also increase and as the temperature decreases, the volume also will decrease.

Answer:

Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.

Answer:

A, T, C y G, son las "letras" del código del ADN; representan los compuestos químicos adenina (A), timina (T), citosina (C) y guanina (G), respectivamente, que constituyen las bases de nucleótidos del ADN. ...El código genético es el conjunto de reglas que define cómo se traduce una secuencia de nucleótidos en el ARNm a una secuencia de aminoácidos en una proteína

Answer:

1. Anything that has mass and occipies space is called matter.

2. The difference between Living and Non-Living Matter are :

Living Matter :

Non - Living Matter :

3. Atom is the smallest particle from which matter is made up of.

4. The one difference between atoms and Molecules are :

Atoms

Molecules :

Answer:

A. Berryllium is a paramagnetic

In the balanced redox reaction in basic solution, the coefficients in front of Cr(OH)₄⁻ and ClO⁻ are 3 and 9, respectively. The balanced equation is 3Cr(OH)₄⁻(aq) + 9ClO⁻(aq) → 3CrO₄²⁻(aq) + 9Cl⁻(aq) + 12H₂O(l).

To balance the given redox reaction in basic solution, follow these steps:

unbalanced equation:

  Cr(OH)₄⁻(aq) + ClO⁻(aq) → CrO₄²⁻(aq) + Cl⁻(aq)

  Oxidation half-reaction: Cr(OH)₄⁻(aq) → CrO₄²⁻(aq)

  Reduction half-reaction: ClO⁻(aq) → Cl⁻(aq)

  Oxidation half-reaction: Cr(OH)₄⁻(aq) → CrO₄²⁻(aq) + 4H₂O(l)

  Reduction half-reaction: ClO⁻(aq) + H₂O(l) → Cl⁻(aq)

  Oxidation half-reaction: Cr(OH)₄⁻(aq) → CrO₄²⁻(aq) + 4H₂O(l)

  Reduction half-reaction: ClO⁻(aq) + 2H₂O(l) → Cl⁻(aq)

  Oxidation half-reaction: Cr(OH)₄⁻(aq) + 8OH⁻(aq) → CrO₄²⁻(aq) + 4H₂O(l)

  Reduction half-reaction: ClO⁻(aq) + 2H₂O(l) → Cl⁻(aq) + 4OH⁻(aq)

  Oxidation half-reaction: Cr(OH)₄⁻(aq) + 8OH⁻(aq) → CrO₄²⁻(aq) + 4H₂O(l) + 3e⁻

  Reduction half-reaction: ClO⁻(aq) + 2H₂O(l) + 2e⁻ → Cl⁻(aq) + 4OH⁻(aq)

  Oxidation half-reaction: 3Cr(OH)₄⁻(aq) + 24OH⁻(aq) → 3CrO₄²⁻(aq) + 12H₂O(l) + 9e⁻

  Reduction half-reaction: 9ClO⁻(aq) + 18H₂O(l) + 18e⁻ → 9Cl⁻(aq) + 36OH⁻(aq)

  3Cr(OH)₄⁻(aq) + 9ClO⁻(aq) + 24OH⁻(aq) → 3CrO₄²⁻(aq) + 9Cl⁻(aq) + 12H₂O(l) + 36OH⁻(aq)

  3Cr(OH)₄⁻(aq) + 9ClO⁻(aq) → 3CrO₄²⁻(aq) + 9Cl⁻(aq) + 12H₂O(l)

The coefficients in front of Cr(OH)₄⁻ and ClO⁻ in the balanced reaction are 3 and 9, respectively.

The balanced equation is: 3Cr(OH)₄⁻(aq) + 9ClO⁻(aq) → 3CrO₄²⁻(aq) + 9Cl⁻(aq) + 12H₂O(l).

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Answer:

3.77 moles of Fe contain 2.27 × 10, 24 as an exponent

Answer:

B. each aquarium . . . the surroundings

Explanation:

Since the Final tempurature is less than the original. Both aquariums released thermal energy

The end of a very long 5-mm-diameter rod is held at 124°C. The surface of the rod is exposed to ambient air at 30°C, with a convective heat transfer coefficient of 100 W/m2K. Determine the temperature at a radial distance of 2.5 mm from the rod's center. The thermal conductivity of the rod is 15 W/mK.b) What is the temperature gradient in the rod at this location?c).

What is the heat flux at this location?The temperature at a radial distance of 2.5 mm from the rod's center is 79.58°C.The solution for this problem can be found by following the steps below:Solution:a) The temperature of the rod, T, can be calculated using the formula for one-dimensional conduction:q/A = -k (d T/d r)whereq is the heat flux,A is the cross-sectional area of the rod,r is the radial distance from the center of the rod,k is the thermal conductivity of the rod,and T is the temperature of the rod.

Taking the boundary condition into account,T(r=0) = 124°CandT(r=2.5 mm) = 30°C, the solution to the differential equation is:T = T0 + (T1 - T0) (r/R)2whereT0 = 30°CT1 = 124°CR = 2.5 mm/2 = 1.25 mmso,T = 30 + (124 - 30) (r/1.25)2 = 30 + 78 (r/1.25)2at r = 2.5 mm,T = 79.58°Cb) The temperature gradient, d T/d r, is given by the derivative of the above equation:d T/d r = 124 (r/1.25)2 / 1.25where d T/d r = 98.72°C/mat r = 2.5 mmc) The heat flux, q/A, is given by the Fourier's law of heat conduction:q/A = -k (d T/d r)whereq/A = -15 (98.72/1000) = -1.48 W/m2at r = 2.5 mmTherefore, the temperature at a radial distance of 2.5 mm from the rod's center is 79.58°C, the temperature gradient in the rod at this location is 98.72°C/m, and the heat flux at this location is -1.48 W/m2.

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Answer:

Physical dependence is characterized by tolerance and withdrawal. Drug or substance dependency is psychological.

Answer: Darmstadtium

Hope that helped

Answer:

Ununnilium

Explanation:

Uun on the table of elements is Ununnilium.

Cork can get out of wine bottle without corkscrew by pushing the cork down into the bottle , use a plastic bag , grip the bag and twist , slowly remove the cork.

To get a cork out of a wine bottle without a corkscrew, you can try the following method:

1. Push the cork down into the bottle: Use a long, thin object like a pen or a chopstick to push the cork into the wine bottle. Apply gentle and steady pressure until the cork is completely inside the bottle.

2. Use a plastic bag: Take a plastic bag and place it over the top of the bottle, covering the cork. Make sure the bag is big enough to cover the entire cork and create a seal around the bottle neck.

3. Grip the bag and twist: Hold the bag tightly around the bottle neck and grip it firmly. Then, start twisting the bottle in a clockwise direction while holding the bag. The friction between the bag and the cork should help to pull it out.

4. Slowly remove the cork: As you twist the bottle, gradually pull the bag upwards. The cork should start to come out of the bottle. Be cautious and continue twisting and pulling until the cork is completely removed.

Remember to be careful while attempting this method to avoid any injuries or spillage. It's always recommended to use a corkscrew for opening wine bottles to ensure a safe and efficient process.

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