Chemistry College

can someone help me pls​

Can Someone Help Me Pls

Answers

Answer 1

Answer:

I dont understand what the question means

Explanation:

Related Questions

What structure
do plant cells have during
cytokinesis that animal cells
do not have?

Answers

Answer: See Explanation

Explanation:

Cytokinesis occurs in mitosis and meiosis for both plant and animal cells. The ultimate objective is to divide the parent cell into daughter cells.

In plants , this occurs when a cell wall forms in between the daughter cells.

In animals , this occurs when a cleavage furrow forms. This pinches the cell in half.

2. Calculate the number of moles of NaOH needed to make 300 mL of 6 M solution?

Answers

Answer:

1.8 mol

Explanation:

concentration (M) = no. of moles (mol) ÷ volume (dm³)

no. of moles = concentration ×  volume

                     = 6 × 300 / 1000

                      =  1.8 mol

white sugar and iodized salt did the resulting look same throughout?​

Answers

yes the look same after mixing them together.

Because White sugar settles at the bottom of iodized salt. White sugar completely mixed with iodized salt.

Why is protection from radiation needed?

Answers

Answer:

Because you could die or get seriously burn bad

Answer:

Radiation protection aims to reduce unnecessary radiation exposure with a goal to minimize the harmful effects of ionizing radiation. ... As radiation exposure becomes more prevalent, a thorough understanding of radiation exposure risks and dose reduction techniques will be of utmost importance.

Explanation:

Some changes in matter may results to 1. _ or 2._ effects in the environment. We have to do our share in maintaining 3. environment. We must 4. too much use of electricity and gasoline. We must also avoid 5. rubber tires and plastics. We must avoid practices that will produce acid rain, increase global temperature, or deplete the ozone layer.​ pls i need answers

Answers

Answer:

C

Explanation:

PLEASE MARK AS BRAINLIEST!!!!!

Under what circumstances may a health insurer charge a higher premium to a woman with a genetic disposition to breast cancer? a) Her mother has breast cancer but she doesn't. O b) She has breast cancer. c) Her sister has breast cancer but she doesn't. d) Health insurers can never discriminate based on genetic information in this way.

Answers

Answer:

D

Explanation:

No company is allowed to discriminate.

What evidence supports the theory of continental drift? Select three.

Question 10 options:

Fossils of plants and animals


Distinctive rock layers and mountain ranges


Glacial scratches on rocks


Volcanic activity along the Ring of Fire

Answers

Answer:

fossils of plants and animals

distinctive rock layers and mountain ranges

Glacial scratches on rocks

Explanation: I took the quiz lol

What state of matter is foam?

Answers

Answer:

Foam is not a state of matter, it is a mixture of two states: gas and (usually) liquid. There are also gas-solid foams.Explanation:

Answer:

Foam is not a state of matter, it is a mixture of two states: gas and (usually) liquid.

Explanation:

Kaya is riding her dirt bike eastward on a dirt road. She spots a pothole ahead. Kaya slows from 20.0 m/s to 6 m/s in 6.0 s. What is her acceleration?

Answers

initial velocity=u=20m/sFinal velocity=v=6m/sTime=t=6s

[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{6-20}{6}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{-14}{6}[/tex]

[tex]\\ \sf\longmapsto Acceleration=-2.3m/s^2[/tex]

How to write the molecular equation of the following reaction. Also, identify the net ionic equation, the total ionic ecuation and the species that gets reduced and oxidized.

NaHCO3(ac) + HCl(ac)

Answers

Answer:

a. HCl + KOH

b. HCHO₂ + LiOH

Only the first H in HCHO₂ is acidic

c. N₂H₄ + HCl

Both N atoms in N₂H₄ are basic, so the compound reacts with 2 mol of HCl.

Explanation:

C.5A What atom is shown below? *
8 points
19 p
20 n
Cholrine
Argon
Calcium
Potassium

Answers

Answer:

p stands for protons. You can identify the element by matching the atomic number with the number of protons.

The answer is Potassium in this case.

answer 3 questions. screenshot

Answers

Cells typically receive signals in chemical form via various signaling molecules. When a signaling molecule joins with an appropriate receptor on a cell surface, this binding triggers a chain of events that not only carries the signal to the cell interior, but amplifies it as well.

Answer question based on the periodic table entry for bromine.
How many protons does bromine have?

a. 35
b. 36
c. 45
d. 80

Answers

A is your correct answer. Bromine has 35 protons.

Which of the following correctly orders the
events in atomic history?
A. The atom has a small dense positive
nucleus.
B. The atom was a small dense sphere
C.Electrons exist in orbitals, or the most
probable location
D. The atom at electrons stuck in an overall
positive atom
E. Electrons exist in perfect orbits based on
energy levels.

Answers

The history of the atom passed through a certain sequence until our recent interpretation of atomic theory.

The correct sequence of atomic theory is;

The atom at electrons stuck in an overall  positive atomThe atom has a small dense positive  nucleus. Electrons exist in perfect orbits based on  energy levels.Electrons exist in orbitals, or the most  probable location

The beginning of the atomic theory saw the discovery of J.J Thompson which led to the plum - pudding model in which the atom was described as a sphere in which electrons are stuck in an overall  positive atom.

This was followed by Rutherford's planetary model in which he concluded that the atom has a small dense positive  nucleus. This was followed by the model of Bohr in which the electrons exist in perfect orbits based on  energy levels.

Lastly, the contemporary model of the atom is called the wave - mechanical model in which electrons exist in orbitals, or the most  probable location.

Learn more: https://brainly.com/question/14156701

What benefits does the food industry gets from catalysts?

Answers

They basically speed up the process of making a product. Therefore, it saves them money in the long run.

hope this helps! Let me know if you have any questions! Good luck on the rest of your assessment!

Mark this as Brainliest if you get a chance:)

In the Periodic Table, which of the highlighted elements has the greatest number of protons?

A Fluorine, F

B Iron, Fe

C Calcium, Ca

D Aluminum, AI

Answers

Answer:

since the modern periodic table is made in ascending order by the atomic number fluorine has the most protons.

The highlighted element that has the greatest number of protons is Iron, Fe. Thus, the correct option for this question is B.

What do you mean by Protons?

Protons may be defined as a type of subatomic particles which are generally present in the centermost part of an atom known as the nucleus along with neutrons. These subatomic particles are positively charged in nature. Ernest Rutherford was known to discover these particles.

According to the question, the number of protons is generally governed by an atomic number of a chemical element. For example, fluorine has an atomic number of 9. It has the same number of protons in its nucleus. The number of protons in Iron is 26, while the number of protons in Calcium is 20. And the number of protons in aluminum is 13.

Therefore, an iron is the highlighted element that has the greatest number of protons. Thus, the correct option for this question is B.

To learn more about Protons and atomic numbers, refer to the link:

https://brainly.com/question/1805828

#SPJ2

AcipHex is classified as

Answers

Answer:

Rabeprazole belongs to a class of drugs known as proton pump inhibitors (PPIs).

how do you expect the size of the atoms to change as you go from neon to argon to krypton

Answers

Answer:

The number of energy levels will increase.

Explanation:

As they are all Noble Gases, they are all in the same family. However, as you go further down the list of Noble Gases, the period number increases. The period number shows the number of energy levels. Hence, an increase in energy levels.

The size of the atoms (atomic radius) would increase down the group from neon to argon to krypton.

What is atomic radius?

Atomic radius can be defined as a measure of the size (distance) of the atom of a chemical element, typically from the nucleus to its valence electrons.

The trends of atomic radius.

Generally, the atomic radius of a chemical element decreases across the periodic table, from alkali metals (group 1 elements) to noble gases (group 8 elements). Also, the atomic radius of a chemical element increases down each group of the periodic table, typically from top to bottom (column).

In this context, the size of the atoms (atomic radius) would increase down the group from neon to argon to krypton.

Read more on atomic radius here: https://brainly.com/question/19581295

Atomic Theory questions. Will be worth 50 points.

Answers

Answer:

1. Option C

2. Option D

3. Option B

4. Option

5. Option

6. Option

7. Option

1. C
2. D
3. B
4. A
5. B
6. A
7. B
8. D
9. D
10. A
11. A
12. C
13. B

(i think uhhh)

How many ML of 0.44 M HCl are needed to dissolve 9.83 g of BaCO3

Answers

Answer:

nBACO3=m/M=9,83/197=0,05(mol)  ->nHCl=0,05.2/1=0,1(mol) =>VHCl=n/CM=0,1/0,44=0,227(lít)

Explanation:

How many grams of O are in 705 g of N2O ?
mass:
g

Answers

Answer:

O are in 535 g of N2O

Explanation:

Which part of the pencil is conductors?
A. The metal and point
B. The eraser and point
C. The wood and eraser
D. the wood and metal​

Answers

The answer is option A. The metal and point. This is because we know metal is a good conductor of electricity. Also the point of a pencil, which is made up of lead is a conductor since lead is a good conductor of electricity despite being a non-metal.

Answer:

A. The metal and point

Explanation:

Elements that can conduct electric current are generally metals. However, the nonmetal carbon in the form of graphite is a good conductor of electricity.

Why has the acidity of the ocean increased over the years?

A.Sediment deposits cannot replenish quick enough in order to affect the acidity

B.Not enough basic solutions in the ocean

C. Waste from ocean life

Answers

Answer:

I think it's A

Explanation:

Carbon dioxide is added to the atmosphere whenever people burn fossil fuels. ... As the amount of carbon dioxide in the atmosphere rises, the oceans absorb a lot of it. In the ocean, carbon dioxide reacts with seawater to form carbonic acid. This causes the acidity of seawater to increase.

Consider the following reactions:

3 Ni 2+(aq) + 2Cr(OH)3 (s) + 10 OH –(aq) → 3 Ni (s) + 2 CrO4 –2 (aq) + 8 H2O (l)

A) What is the value for n for this reactions?

B) Calculate the standard Gibbs Free-Energy

C) How long does it take a current of 5 A to deposit 95 g of nickel?

Answers

For the reaction

3 Ni2+(aq) + 2 Cr(OH)3(s) + 10 OH- (aq)  →  3 Ni(s) + 2 CrO42-(aq) + 8 H2O(l) G = +87 kJ/mol

Given:

(Ni2+(aq) + 2 e- →  Ni(s)) x 3 Ered = -0.28 V

(CrO42-(aq) + 4 H2O(l) + 3 e- →  Cr(OH)3(s) + 5 OH-(aq)) x 2

_____________________________________________________________________________________

3 Ni2+(aq) + 6 e- →  3 Ni(s)

2 CrO42-(aq) + 8 H2O(l) + 6 e- →  2 Cr(OH)3(s) + 10 OH-(aq)

what would be the best way to determine the amount of AgNO3 in the dissolved solution? Justify your answer

Answers

The best way to determine the concentration of AgNO3 dissolved in solution is by precipitation using a chloride.

Precipitation is one of the oldest and handy methods of chemical analysis. It involves the addition of a reagent which is known to form a precipitate with the test solution.

The precipitate is now recovered from solution, dried and weighed. Stoichiometric calculations show the amount of the test substance dissolved in the test solution.

In this case, NaCl can be used to carry out a precipitation as follows;

AgNO3(aq) + NaCl(aq) -------> AgCl(s) + NaNO3(aq)

The AgCl precipitate is recovered dried and weighed and then the amount of AgNO3 in the dissolved solution is determined.

Learn more: https://brainly.com/question/25292604

can you describe a carbon atoms for me please

thank you

Answers

Carbon (from Latin: carbo "coal") is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent-making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust.

Check all of the following that are mixtures.
A) Water
B) Iron
C) Milk
D)Trail mix

Answers

trail mix

mixtures are basically just a combination of things. trail mix is a combination of nuts

Explain how a density current might form in the Arctic Ocean

Answers

they are caused by winds and changes in seawater density.

what if two objects have the same mass but different sizes which is denser? expain

Answers

Answer:

Imagine you have 5 marbles in your hand and 5 marbles spread in front of you on the floor. Each group has the same mass, but one is contained in a smaller space. The marbles in your hand would be denser because there is more "stuff" in a smaller space.

Explanation:

can u help me with this i confused with this

Answers

Answer:

your creating a animal/creature

Explanation:

a human is a mammal we grow use energy reproduce and change our clothes to respond to our surroundings

Other Questions
This passage is most probably excerpted from an article about Franklin in a business journal Answer A: an article about Franklin in a business journal A a work of cultural criticism attacking Franklin for the decay of traditional values Answer B: a work of cultural criticism attacking Franklin for the decay of traditional values B a book about Franklin's scientific research Answer C: a book about Franklin's scientific research C a biography of Franklin intended for a general audience Answer D: a biography of Franklin intended for a general audience D How dose critical mass play a role in nuclear reaction? When a character has an emotional problem (conflict) with self-doubt and fear, this is an example of which specific type of CONFLICT? Internal? or External? AND Man v. man, Man v. nature, Man v. technology, Man v. society, Man v. self or Man v. Fate? A garden is 8 feet by 12 feet and Lewis wants to increase the area by 25%. what could be the new dimensions of the garden? excel provides _____ in categories such as financial management and budgets. While organizing his computer's power cords, Matt realizes his printer power cord is frayed (coming apart). What should Matt do to prevent damage and still be able to use the printer? Move the power cord to another outlet. Keep the cord plugged in. Replace the power cord. Unplug the power cord. 13, 14, 14, 16, 16, 16.16, 18, 18, 19What is the MAD? 16. "Famine or fear of stronger enemies might force on tribe to ask another for help and give themselves into a type of bondage in exchange... Those seeking protection, or relief from starvation, would become the servants of those who provided relief. Debt might also be worked off through a form of servitude. Typically, these servants became a part of the extended tribal family." -- The Americas, Europe, and Africa before 1492, Lumen Learning Based on the excerpt above, slavery in medieval African kingdoms is most similar to which of the following? - A. debt peonage B. serfdom in Feudal Europe C. The Transatlantic Slave Trade D. Enslavement of prisoners of war Another term for the plot structure of the hero journey 100 POINTS!!!!!!! FAST PLEASEAFind a room that can be made completely dark. In the room, tape a piece of white paper on the wall at eye level. Turn on the flashlight, and turn off the lights in the room. Observe what the light looks like as it hits the white paper. Next, place the clear plastic in front of the flashlight. Does the plastic affect how the light hits the paper on the wall? If so, how?BNow place the waxed paper in front of the flashlight instead of the plastic. Does the waxed paper affect how the light hits the paper on the wall? Explain your response. SQuestion 81 ptsLana deposited $57 into a savings account with a rate of 6%and earned $51.30 in simple interest.How long did it take the account to earn the $51.30 insimple interest? what was the role of the church in medieval europe? Read the text Insert true or falsePleat for now write ad power of 5 (270) Why do you think colic in animals is so hard to diagnose correctly? HELP ASAP 10 POINTS A. Write an expression to represent the difference between the two points shown on the number line.B. Find the distance between the two points. [Hint: Remember that distance is always positive.] Sam had a dream about being in a fistfight with his brother. His mother has suggestedthat this might mean that he holds unconscious anger toward his brother. Sam deniesany anger toward his brother, but his mother says that doesn't mean it isn't true.Which theory of dreams is Sam's mother following? put the following equation of a line into a slope-intercept form, simplifying all fractions. 3y-3x=21 Esas hamburguesas no son muy buenas pero(those over there) son deliciosas. Identify the vertex of the equation y=x^26x+2. Show all work for full credit.