Jillian made a model of an animal cell. She used a round
balloon to represent the cell membrane. She pushed
objects like marbles and rocks into the balloon to show cell
parts, then filled it with water to show fluid inside the cell.

Answer:

D not c

Explanation:

The point showing the laser being absorbed is D.

LASER stands for “Light Amplification by Stimulated Emission of Radiation”

Lasers not only increase the intensity of light but also generate light. Lasers emit light by stimulated emission of radiation, which increases the intensity of radiation. Some lasers produce visible light, and some produce ultraviolet or infrared rays.

The laser light exhibits some peculiar properties compared with the conventional light which make it unique.

Therefore, The point showing the laser being absorbed is D.

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Answer:

Na20

Explanation:

I did a quick google search and it was right there lol

Answer:

It would be Na20 please mark brainliest have a nice day

Answer:

3.683×10^21 particles

Explanation:

Number of particles in a substance = (mass of the substance/molar mass of the substance)×Avogadro's number

Given;

Mass of compound =1.45g

Molar mass of compound =237g

Avogadro's number=6.02×10^23

Therefore, number of particles = (1.45/237)×6.02×10^23

=3.683×10^21 particles

Answer:

3.68•10^21 particles (correct to 3SF)

Explanation:

1.45 • xg molecular compound • 1mol/237g • (6.02•10^23)/ 1 mol = 3.6831•10^21 representative particles

*6.02•10^23 is Avagadro's number

Answer: Yes, they have.

Explanation: The frequency, severity, and length of heat waves are increasing. Heat and humidity already kill an average of 1,300 people in the U.S. each year. Deadly heat waves of at least 20 days affect 30% of the earth's population. That will increase to 75% by 2100 if global warming isn't stopped.

Answer:

47 grams CoCl needed.

Explanation:

1 mole weight of CoCl in 1 Liter solution => 1.0 molar solution

∴ 1/2 mole weight of CoCl in 1/2 Liter solution => 1.0 molar solution.

1/2 mole weight of CoCl = 1/2(94 g/mole) = 47 grams CoCl needed.  

Final answer:

To make a 1.0 molar solution of CoCl₂ in half a liter of water, you would need 64.915 grams of CoCl₂, using its molar mass of 129.83 g/mol.

Explanation:

The question you are asking is about making a 1.0 molar solution of cobalt(II) chloride, CoCl₂, in 1/2 liter of water. To calculate the amount of CoCl₂ required, we will use the formula:

mass (grams) = molarity (mol/L) × volume (L) × molar mass (g/mol).

First, we need to establish the molar mass of CoCl₂. Cobalt has an atomic mass of about 58.93 g/mol, and each chlorine has an atomic mass of about 35.45 g/mol. So, the molar mass of CoCl₂ is:

58.93 g/mol (for Co) + 2 × 35.45 g/mol (for Cl) = 129.83 g/mol.

Now, we can calculate the required mass of CoCl₂ for a 1.0 M solution:

mass = 1.0 mol/L × 0.5 L × 129.83 g/mol = 64.915 grams.

Therefore, you would need 64.915 grams of CoCl₂ to make a 1.0 molar solution in half a liter of water.

Answer:

Weigh 80g of Sodium chloride and dissolve it in 100ml of water.

Explanation:

The formula for weight percent (w/v) is: [Mass of solute (g) / Volume of solution (ml)] x 100. This is used to prepare a solution of a solid in a liquid.

To prepare 80% solution of sodium chloride in water, 80g of sodium chloride is dissolved in 100ml of water according to the formula above. 80g of sodium chloride is measured in an appropriate weighing balance and carefully transferred to a standard flask and made up to the 100ml mark.

Answer:

There is no image

Explanation:

When the DNA changes from AGT TAC CCG ATT to AGT TAG CCC GAT,

Translocation occur.

a type of genetic alteration when a segment of one chromosome separates and joins another. Chromosomes from different species can occasionally swap portions with one another.

Deoxyribonucleic acid (DNA) exists an organic chemical that contains genetic information and teachings for protein synthesis. It exists located in most cells of every organism. DNA exists as a key part of reproduction in which genetic heredity happens via the passing down of DNA from parent or parents to offspring.

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Answer:

i think it's eutrophication

Lakes can disappear due to Eutrophication, which is a biological process where a buildup of nutrients causes rapid plant growth. When these plants die and decompose, the oxygen in the water is consumed, leading to the disappearance of the lake over time.

Lakes can disappear due to various natural phenomena, but particularly due to Eutrophication. This is a biological process, where a buildup of nutrients can cause rapid plant growth, particularly algae, in the lake. As these plants die and decompose, bacteria thrive and consume oxygen in the water, thereby making it uninhabitable for aquatic life. Continued eutrophication can eventually lead to a lake losing its water and becoming a marsh or dry land.

Condensation, Transpiration, and Photosynthesis do not directly contribute to the disappearance of lakes, as these processes are part of the water cycle and the energy balance in ecosystems, respectively.

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Answer:

I think the answer is B

Explanation:

Nuclear energy is usually considered a non-renewable energy source. Although uranium is found in rocks all over the world, nuclear power plants usually use a very rare type of uranium, U-235. Uranium is a non-renewable resource.

Answer:

Distance = 72 meters.

Explanation:

Given data:

speed of burrito = 4 meter/ second

Time taken in flight = 18 seconds.

Required: The distance covered during this time and having the above speed by the burrito.

Solution :

Formula of speed is given below.

Speed = distance / time interval

By putting the values of speed and time, we get,

4 meter / second = distance / 18 seconds.

Multiply 18 both, we get

4 x 18 = distance

Distance = 72 meters.

76.6 litres is the volume of the gas if pressure and temperature changes to STP.

Explanation:

Data given:

Volume of the gas V1 = 15.9 litres

pressure of the gas P1 = 589 kPa or 5.81 atm.

temperature T1 = 56.5 degrees or 329.3 K

Final pressure P2 = 101.3 kPa

Final temperature T2 = 273 K

At STP the pressure is 1 atm or 101.3 kPa and the temperature is 273 K. So from the question the final temperature and pressure is at STP.

from Gas Law:

[tex]\frac{P1V1}{T1}[/tex]  =  [tex]\frac{P2V2}{T2}[/tex]

V2 = [tex]\frac{P1V1T2}{P2T1}[/tex]

Putting the values in  the above rearranged equation of Gas Law:

V2 = [tex]\frac{589 X 15.9 X 273}{329.3X 101.3}[/tex]

    = 76.6 Litres

If the pressure and temperature change to STP, the new volume will be "76.6 liters".

According to the question,

Initial pressure, P₁ = 589 kPa or,

                              = 5.81 atm

Final pressure, P₂ = 101.3 kPa

Initial volume, V₁ = 15.9 L

Initial temperature, T₁ = 56.5° or,

                                    = 329.3 K

Final temperature, T₂ = 273 K

By using the Gas law,

→ [tex]\frac{P_1 V_1}{T_1} =\frac{P_2 V_2}{T_2}[/tex]

or, the new volume be:

→ V₂ = [tex]\frac{589\times 15.9\times 273}{329.3\times 101.3}[/tex]

       = 76.6 L

Thus the above approach is correct.

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Answer:

Oxygen and 0.36

Explanation:

Oxygen is usually always in excess and you use the math to find the 0.36

Answer:

C

In an exothermic reeaction, the energy of products is less than the energy of reactants.

Explanation:

Answer:

In an exothermic reeaction, the energy of products is less than the energy of reactants.

Explanation:

Final answer:

The male reproductive cell is known as a sperm, and the female counterpart is an egg. They are both gametes, which are haploid cells vital for sexual reproduction. During fertilization, these cells combine to form a diploid cell called a zygote, initiating embryo development.

Explanation:

The male reproductive cell is called a sperm. The female reproductive cell is called an egg. When the male and female reproductive cells join during fertilization, a zygote forms.

Sexual reproduction involves the union of a male and a female gamete. Gametes are haploid cells, each carrying 23 chromosomes—half the number found in other body cells. The process of gametogenesis includes spermatogenesis and oogenesis, where sperm and eggs are produced respectively. In males, this occurs in the testes, often highlighted in figures on the male reproductive system, such as the one labeled Figure 27.2. During spermatogenesis, sperm acquire a tail and the ability to swim, essential for reaching the female gamete. The female counterpart, oogenesis, results in a single large egg from the initially formed four haploid cells.

Upon fertilization, a sperm cell and an egg cell unite to form a zygote, a diploid cell that contains a complete set of chromosomes, one set from each parent. This diploid cell marks the start of a new organism and it divides by mitosis as it travels to the uterus, eventually developing into an embryo.

I think the answer is direct

Answer:

I don't know what?

Explanation:

Answer:

They don’t grow from a tree

Explanation:

They grow from a root system that produces an a over ground structure resembling a stalk

the banana tree is technically an herbaceous plant

Answer:

0.11866M

Explanation:

molarity is mol/L

0.267 mol/2.25L = 0.1186666...

round depending on how many digits you need

Answer:

Work = 5595.31J

Explanation:

Mass = 300.5kg

Distance (h) = 1.9m

Acceleration due to gravity (g) = 9.8m/s²

Work done on an object is the product of the force applied over the distance the object is moved.

Work = force * distance

Force = mass * acceleration (a or g)

F = m* g

F = 300.5 * 9.8

F = 2944.9N

Workdone = force *distance

Work = 2944.9 * 1.9

Work = 5595.31J

The work done is 5595.31J

Answer:

0.29 molL-1 or 0.29 M

Explanation:

Now we have to use the formula

n=CV

Where

n= number of moles = 0.87 moles

C= concentration of the solution (the unknown)

V= volume of the solution = 3.00L

Now having specified all parameters except the unknown (molarity if the sodium chloride solution) we can now proceed to find it.

C= n/V

C= 0.87mol/3.00L

C= 0.29 molL-1

Answer:

0.29 mol/L

Explanation:

When sodium chloride (NaCl) is dissolved in water, it will dissociates to produce sodium ion (Na+) and chloride ion (Cl-) in solution as shown below:

NaCl —> Na+ + Cl-

Next, let us calculate the molarity of NaCl. This is illustrated below:

Mole of NaCl = 0.87 mole

Volume of solution = 3 L

Molarity =?

Molarity = mole of solute /Volume

Molarity = 0.87mole /3L

Molarity = 0.29 mol/L

Therefore, the molarity of NaCl is 0.29 mol/L

Answer: There would have to be three nitrogen atoms in the products. The law of conservation of matter states that the amount of substance before a reaction occurs  should be the same as the amount of substance after the reaction.

Explanation: This is the EXACT sample answer from the test, just reword it if you want. ^

According to the law of conservation of mass, Marcia can conclude that reaction started with 3 nitrogen atoms as mass of reactants and products are equal  as per the law of conservation of mass.

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

Law of conservation of mass and energy are related as mass and energy are directly proportional to each other 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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In the Venn Diagram:

- "DNA replicates" goes under "Cell divides once".

- "4 Daughter cells" is placed under "Cell divides twice".

- "Growth and repair" can be in the overlap of "Asexual Reproduction" and "Both Sexual Reproduction".

In the Venn Diagram:

- "DNA replicates" would go under the category "Cell divides once" as DNA replication typically occurs before cell division.

- "4 Daughter cells" would be placed under the category "Cell divides twice" as it indicates a cell division process resulting in four daughter cells.

- "Growth and repair" can be placed in the overlapping space of "Asexual Reproduction" and "Both Sexual Reproduction" as both types of reproduction involve growth and repair processes.

The probable question maybe:

Listed in the Item Bank are some key terms and expressions associated with the categories seen in the Venn Diagram. To find out more information about items, some have more details available when you click on them. Drag and drop each item onto the proper area of the diagram. If an item describes more than one category, be sure to place it in the overlapping space. ITEMBANK: Move to Bottom 2 Daughter cells DNA replicates 4 Daughter cells Cell divides once Cell divides twice Growth and repair Asexual Reproduction Both Sexual Reproduction drag and drop answer here drag and drop answer here drag and drop answer here

Answer: im pretty sure its D

Explanation:

According to intermolecular forces of attraction, statement which best describes what happens to water during vaporization is 'B'.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Answer:

601.8mL

Explanation:

First, we'll begin by obtaining an equation connecting volume and number of mole together. This is illustrated below:

From the ideal gas equation:

PV = nRT

Divide both side by P

V = nRT/P

Now divide both side by n

V/n = RT/P

Under the same conditions simply means temperature(T), pressure (P) and the gas constant (R) are all constant i.e

RT/P => constant

Therefore, the above equation can be written as:

V1/n1 = V2/n2

Now we can solve for the final volume otherwise known as the new volume as follow:

Data obtained from the question include:

n1 (initial mole) = 0.214 mol

V1 (initial volume) = 343.4 mL

n2 (final mole) = 0.375 mol

V2 (final volume) =?

Applying the the equation V1/n1 = V2/n2, the final volume is obtain as illustrated below:

V1/n1 = V2/n2

343.4/0.214 = V2/0.375

Cross multiply to express in linear form

0.214 x V2 = 343.4 x 0.375

Divide both side by 0.214

V2 = (343.4 x 0.375)/0.214

V2 = 601.8mL

Therefore, 0.375 mol of argon gas will occupy 601.8mL under the same condition.

Answer:

Now molecules:

(2) molecules of H 2 +  (1) molecules of O 2 → (2) molecules of H 2 O

Explanation:

i just got the answer correct

The question involves a basic chemical reaction in Chemistry. Two molecules of hydrogen and one molecule of oxygen combine to form two molecules of water.  It shows the process of a balanced chemical equation.

The question provided involves a basic chemical reaction, in which hydrogen (H2) and oxygen (O2) molecules combine to create water (H2O). This process is an example of a balanced chemical reaction, in accordance with the law of conservation of matter that requires the total number of atoms for each element to remain the same before and after a reaction. Essentially, 2 molecules of hydrogen (H2) and 1 molecule of oxygen (O2) will combine to form 2 molecules of water (H2O)

This can be represented as: 2H2 + O2 → 2H2O. This means, two hydrogen molecules (each containing 2 hydrogen atoms) react with one molecule of oxygen (containing 2 oxygen atoms) to form two molecules of water (each containing 2 hydrogen atoms and 1 oxygen atom).

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Answer:

0.143L

Explanation:

Molar mass of H2SO4 = 98g/Mol

No of mole = mass/molar mass

No of mole= 49/98 = 0.5 mol

No of mol = concentration × volume

Volume = n/C = 0.5/3.5 = 0.143L

16.4 grams is the mass of solute in a 500 mL solution of 0.200 M .

sodium phosphate

Explanation:

Given data about sodium phosphate

atomic mass of Na3PO4 = 164 grams/mole

volume of the solution = 500 ml or 0.5 litres

molarity of sodium phosphate solution = 0.200 M

The formula for molarity will be used here to know the mass dissolved in the given volume of the solution:

The formula is

molarity = [tex]\frac{number of moles of solute}{volume in litres}[/tex]

    putting the values in the equation, we get

molarity x volume = number of moles

0.200 X 0.5= number of  moles

number of moles = 0.1 moles

Atomic mass x number of moles = mass

putting the values in the above equation

164 x 0.1 = 16.4 grams

16.4 grams of sodium phosphate is present in 0.5 L of the solution to make a 0.2 M solution.

The mass of solute in 500mL solution is 16.4 grams. The number of moles can be calculated by using Molarity formula to find Mass of the solute.

Given:

Atomic mass of Na3PO4 = 164 grams/mole

Volume of the solution = 500 ml or 0.5 litres

Molarity of sodium phosphate solution = 0.200 M

The formula for molarity will be used here to know the mass dissolved in the given volume of the solution:

Molarity = Number of solute / Volume of solution

Molarity * volume = number of moles

0.200 * 0.5= number of  moles

Number of moles = 0.1 moles

Mass= Atomic mass * number of moles

On subsituting:

164 * 0.1 = 16.4 grams

16.4 grams of sodium phosphate is present in 0.5 L of the solution to make a 0.2 M solution.

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