Does anybody understand this I’m stuck

Answer:

D. They are made of repeating subunits.

Explanation:

The first column represting polymers such as DNA, cellulose, nylon, hair are labelled with cells, plant material, synthetic material, animal material and They are made of repeating subunits.

Not all the entries in the first column come from living things as nylon comes from synthetic material (man-made). But all four (DNA, cellulose, nylon, hair) are conists of repeating unit.

DNA made up of nucleotides, cellulose is made up of rpeating units of monomer glucose, nylone is made of repeating unit of two monomers  hexamethylene diamine and adipic acid, and hair is made of repeating unit of  protein called keratin.

Hence, the correct answer is "D. They are made of repeating subunits."

Answer:

They are made of repeating subunits....(D)

Explanation:

hope this helps. also the person above me is correct

Answer:

I've already answered this one for you. Anyway, please let me know if you have any more questions or need help!

Answer:

c chart c

Explanation:

saturated solution: A solution with solute that dissolves until it is unable to dissolve anymore, leaving the undissolved substances at the bottom.

The chart which represents the graph for the saturated solution is chart C, because in that graph extra solutes are present at the bottom.

Saturated solutions are those solutions in which all solutes will dissolve in the solvent and addition of extra solute will not dissolve in the solution, but gets settle down at the bottom of the solution.

Hence chart C shows the saturated solution.

To know more about saturated solutions, visit the below link:
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Answer:

facts

Explanation:

Answer:

yes i understand

Explanation:

The information we can obtain for an element from periodic table is its atomic number and chemical symbol. Thus option A and B are correct.

Atomic number of an element is the number of protons of the element. For a neutral atom the number of electrons is equal to the number of protons.

There are 118 elements in the modern periodic table and they are classified into different group and periods. Elements of same number of valence electrons and similar physical and chemical properties are classified into one group.

There are 18 groups and 7 period in  the periodic table. Each classification is based on their atomic number. Chemical symbols are used to represent the elements and they can be easily identified by the symbols.

For example, hydrogen have the chemical symbol H and oxygen with O and carbon with C. etc. Similarly we can get mass number of elements from periodic table. Thus option A and B are correct.

To find more about periodic table, refer the link below:

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#SPJ2

Answer:

the third option I think

Explanation:

Answer:

3 and 2

Explanation:

i had that question

Answer:

They have similar properties, because they share similar amounts of electrons in their outer shell, valence electrons! This means they will only be able to interact with other elements with those electrons so they often show similar properties.

Explanation:

Answer:

No,  The Significant Figures are 2 3

Explanation:

The temperature : 263.016 K

Combined with Boyle's law and Gay Lussac's law  

[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]

P1 = initial gas pressure (N/m² or Pa)  

V1 = initial gas volume (m³)  

P2 = gas end pressure  

V2 = the final volume of gas  

T1 = initial gas temperature (K)  

T2 = gas end temperature  

P1=760 mmHg

V1= 4 L

T1 = 275 K

P2=704 mmHg

V1=4.13 L

[tex]\tt \dfrac{760\times 4}{275}=\dfrac{704\times 4.13}{T_2}\\\\T_2=263.016~K[/tex]

Answer: I can not see the image.

PLZ HELP ME. This is my second time posting my question because the first time a person put a random answer. If you do not know the question please do not answer it and leave it to someone else. Thank you, and my question is on the attached image below. Thanks!

Answer:

i think its letter D

Explanation:

Answer:

I think it is B if it is not then I am sorry.

Explanation:

Answer:

Molecular Mass

Explanation:

It's asking for the numerical quantity. That quantity would be the Molecular Mass. Take the sample mass and divide it by the molecular mass to get the number of moles.

(14g N * 2) + (1g H *4) = 32g / mol of N2H4

To get # of moles, divide the sample mass by the molecular mass

25g / 32g = 0.78125 moles

Answer:

Let's start with the fact that cereals , are made of grains and are mostly carbohydrates. therefore they contain carbon oxygen and hydrogen. They also contain proteins so have nitrogen. Plants have the minerals that are in the soil where they grow, so the list you have is correct. They also generally have added vitamins ad minerals. The vitamins contain C, H, O N, and a few others such as sulfur, The added minerals might contain:copper, iron, zinc, cobalt, selenium, silicon and molybdenum .

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The three elements present in the ingredients of the cereal drink which are not listed in the nutrition facts are Iron, Calcium, and Zinc

Cereals are monocotyledonous grass crops cultivated annually for the purpose of consumption. They are rich in fiber and energy. Examples of them include;

Cereal drinks are processed drinks extracted from cereal crops through fermentation. They are rich in nutrients as they contain important sources of carbohydrates, dietary protein, and vitamins.

The ingredients present in a cereal drink are composed of essential elements such as:

Some of which are not listed in the nutrition facts are Iron, Calcium, and Zinc.

Therefore, we can conclude that the elements present in the ingredients of the cereal drink which are not listed in the nutrition facts can be Iron, Calcium, and Zinc.

Learn more about essential elements here:

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Answer:

Convection

Explanation:

Convection is a mode of heat transfer that involves the actual movement of particles. In this case the particles are air particles.

Since hot air is less dense, it is pushed up by the denser cool air. This process may continue indefinitely and a convection current is set up.

Answer:

Willow is correct because as things age and mature more, usually the more better they are.

Explanation:

To elaborate, you can perceive the development of the modern day atomic model as one aging and maturing. There's usually a correlation between age/maturity and knowledge, the same is true for the atomic model and other scientific theories.

Answer:

B- Have new properties after they are mixed

I hope this helps

Answer:

1. 1g/ml

Explanation:

1. Density is mass divided by volume (g/mL).

10g/10mL = 1 g/mL

2. When you already know the density and the volume, you can use the density as a unit converter.

[tex]5mL*\frac{20g}{mL} = 100g[/tex]

3. It's the same with density and mass.

[tex]20g*\frac{1mL}{5g} = 4mL[/tex]

Answer:

true

Explanation:

please mark BRAINLIEST

Answer:

(C) im pretty sure is the answer

Explanation:

Answer:

C

Explanation:

Answer:

Explanation:

X / Y = 230

The answer is infinite. However, below we have created a list of what divided by what equals 230.

230 / 1 = 230

460 / 2 = 230

690 / 3 = 230

920 / 4 = 230

1150 / 5 = 230

1380 / 6 = 230

1610 / 7 = 230

1840 / 8 = 230

2070 / 9 = 230

2300 / 10 = 230

Answer:

Explanation:

I'm not sure what you mean by the units. The answer using kg and ms is 23000 * 50 = 1150000 kg m/s

Answer:

Unwashed hands: This sample swab will have the most bacteria growth, as the bacteria has not been cleaned or Removed at all from this person‘s hands.

Regular Soap: Soap is meant to remove bacteria, not kill it. So by swabbing  her hands after washing with regular soap , this technique will not be very effective. This also depends on if the soap is antibacterial or not. By wiping your hand, it may just move the bacteria.

Re-Swabbing: this will have almost the same exact effect as the first experiment. There may be a minute difference between unwashed hands and re-wiping unwashed hands.

Hand sanitizer: hand sanitizer is meant to kill bacteria, not move it, so this should have the least bacteria/virus beings on this swab. Alcohol based hand sanitizer is the most effective, and should kill 99.99 percent of germs. However, you have to wait atleast a minute before swabbing to let hand sanitizer work.

Explanation: I looked it up! :) hopefully this is helpful, please let me know! Have a great day:)

Answer:

The statement is true

I found this doing research.

Apparantly, each sub level is made up of one or more orbitals and the orbitals in each sub level are always odd number. Each orbital can only have two electrons and those two electrons will have opposite spin.

Explanation:

Answer:

True

Explanation:

Answer:

B

Explanation:

trust me im 100% correct

Answer:

b

Explanation:

I hoped this helped u have a great day

Answer:

the awnser is D

Explanation:

because all elements have to be capitalized

Answer:

The block is made up of aluminum.

density = 2.7 g/cm³

Explanation:

Given data:

Dimension of metal block = 2.0 cm×2.5 cm× 3.0 cm

Mass of block = 40.05 g

Density of block = ?

Which metal is this = ?

Solution:

Density:

Density is equal to the mass of substance divided by its volume.

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Volume of block = 2.0 cm×2.5 cm× 3.0 cm = 15 cm³

d = m/v

d = 40.5 g/ 15 cm³

d = 2.7 g/cm³

The block is made up of aluminum.

Answer:

Explanation:

when the angle between the force and  displacement is 0

Answer:

2.7 gm/cm cubed

Explanation:

To get the answer, you should divide the mass by the volume or 54 divided by 20 = 2.7