Someone help it’s due today

Answers

Answer 1

Answer:

All elements are neutral

Explanation:

The plum pudding model of the atom indicated that all elements are neutral. The model was proposed by J.J Thomson after he conducted his experiment on the gas discharge tube.

From the experiment he discovered electrons which he called cathode rays.

Therefore, he suggested the plum pudding model of the atom.

The model describes negatively charge sphere surrounded by positive charges to balance them.

Related Questions

In this activity, you will plan and conduct an investigation to compare a single property
across several substances. You must select a measurable property, such as boiling point or surface tension. After your investigation, you will compare the results and use your data to make inferences about the strength of the electrical forces in each substance you tested.

Answers

Do you still need help with this question?

Cuantos gramos de nitrato de potasio (KNO3) son necesarias para preparar 800ml de solucion al 12 % m/v

Answers

Answer:

96 g

Explanation:

Tomando en cuenta que estamos hablando de una solución de Nitrato de potasio cuya concentración es 12% m/V, debemos entonces usar la expresión de %m/V:

%m/V = msto / Vsol * 100 (1)

De esta expresión, debemos despejar la masa de soluto (msto) que es precisamente el valor que estamos buscando. Al hacer el despeje tenemos:

msto = %m/V * Vsol / 100 (2)

Ahora solo nos queda sustituir los valores dados y resolver:

msto = 12 * 800 / 100

msto = 96 g de KNO₃

Espero te sirva.

Which factor is responsible for the dry period

Answers

Answer:

drought

Explanation:

because it looses all of the water in the aria / desertification

Drought that’s the reason why

HELP PLEASE IM GIVING BRAINLISTAs the amount of salt in water increases, the___________ of the water increases.

Question 2 options:

humidity

density

temperature

size

Answers

The answer is density

As the amount of salt in water increases, the density of the water increases. The more particles present in unit volume the more densely packed the substance.

What is density ?

Density of a substance is the measure of its mass per unit volume. Density describes how closely its particles are packed. Densely packing means more particles in a unit volume.

The density of water is 1 g/ml. However, when the salinity increases, the salt solution increases in density by the solute particles. If the density of an object is less than water, it will float on it. Objects denser than water will sink on water.

As the salinity increases, density of water increases, makes the surface tension also increases, which best illustrates what happens in dead sea. Hence, option b is correct.

Find more on water density:

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what volume of 0.20 M NaCl contains 10.0 g

Answers

0.862 liters of a 0.20 M NaCl solution (aq) contains 10.0g of NaCl.
Answer : 0.862 liters

How many atoms are in 4.5 g of AICI3?

Answers

Answer:

2.047 × 10^22 atoms.

Explanation:

To calculate the number of atoms (nA) in AlCl3, we first need to find the number of moles in the compound, AlCl3.

Molar mass of AlCl3 = 27 + 35.5(3)

= 27 + 106.5

= 133.5g/mol

Using mole = mass/molar mass

mole = 4.5/133.5

mole = 0.034moles

number of atoms in a substance (nA) = number of moles (n) × Avagadros number or constant (6.02 × 10^23 atoms)

nA of AlCl3 = 0.034 × 6.02 × 10^23

nA = 0.2047 × 10^23

nA = 2.047 × 10^22 atoms.

14) For the reaction P4(s) + 6 Hz(9) — 4 PH3(g)
a) f 15 g of Pe were used, how many liters of PHs were produced?
b) How many liters of H2 are required to completely react with 15 g of P4?
c) How many grams of PHs will be produced if 6.0 L of H2 are used?
Molar Mass of P4: 1 mol P4 =
g
a)
L PH3
b)
L H2
Molar Mass of PH3: 1 mol PH3 =
9
c)
g PH3

Answers

The correct answer is b

Which are not combination reactions?
Check all that apply.
A. 2H2O + 2H2 + O2
B. H2 + Cl2 → 2HCI
C. Fe + MgO + Mg + FeO
D. 2Na + Cl2 → 2NaCl

Answers

Answer:

A and c

Explanation:

In A the product is added to the reactant, so the real reaction is (2H2O = 2H2+O2).

In B hydrogen and clorine are combined to give hydrochloric acid and 2 is used to balance the reaction in the product, so it's a combination reaction .

In C the case is similar to A , so the real reaction is (Fe+MgO = Mg + FeO ) this is displacement reaction where a more reactive element takes place of a less reactive element .

In D sodium reacting with Chlorine to give sodium chloride ,so we conclude that it's a combination reaction .

The general oxidation of a metal ( M ) by a copper ion ( Cu2+ ) is M(s)+Cu2+(aq)⟶M2+(aq)+Cu(s) All the listed metals can be oxidized by Cu2+ ions but the reactions will occur at different rates. Arrange the metals based on how quickly each oxidation by Cu2+ ions should occur.

Answers

Answer:

Ba, Ca, Mn, Ni

Explanation:

What is the name of this formula: Fe3Cl? PLEASE AND THANK YOU :(

Answers

Answer:

Ferric Chloride or Iron (III) Chloride

Explanation:

H-H-C=C-H-H + Br—Br —> H-H-Br- C-C-H-Br-H

Answers

Answer:

Complexity.

Explanation:

Okay, I am NOT explaining this whole thing, but simply, C2n product.

Don't ask. Just don't.

A dog runs 100 meters at a speed of 5 m/s. What is his time

Answers

Answer:

20 m/s

Explanation:

have a nice day¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡

Plz help me with these three please please !!!!!

Answers

Explanation:

Cations are positively charged ions with fewer electrons than protons. To partake in reaction, metals lose electrons to achieve a stable octet configuration. It has lost valence electrons and wold have a positive charge associated with it.

Potassium is a group 1 element. A metal.

Potassium has 1 valence electron so it loses the valence electron to form a stable octet.

A potassium ion has a positive charge and therefore cannot be an anion but is a cation.

The group number pretty much denotes the number of valence electrons.

Group 1 = 1

Group 2 = 2

Group 17 = 7

Group 18 = 8

Would water boil at Huntington Beach or at Big Bear. (hint, Huntington beach is at sea level, Big Bear is 6700 ft above sea level) Assume the amount of water and the air temperature are the same in both locations. Explain your answer in detail!

Answers

I can’t tell what the question is but it would boil faster at Big Bear faster because the boiling point of water is lower at higher altitudes.

David walks 10 Km North. He turns East and walks 10 more Km. What is his distance

Answers

Answer:

20 km

Explanation:

he walks 10 km + another 10 km so 20 :)

You have been given a choice of four elements; Lithium, Magnesium, Sulfur, and Bromine. You must decide which two elements would form a compound that has one atom of the metallic atom and two of the non-metallic atom in the final neutral compound. Which choice lists the two atoms with the correct formula for the compound?

A.
Magnesium and Sulfur; MgS2

B.
Lithium and Bromine; LiBr2

C.
Lithium and Sulfur; Li2S

D.
Magnesium and Bromine; MgBr2

Answers

The compound formed that has been neutral has been Magnesium and bromine. Thus, option D is correct.

The periodic table has been the arrangement of the elements with increasing atomic number and similarity in the reactivity.

The metals in the periodic table are elements that has been able to accept electrons, and nonmetals are the elements in the table that loses electrons to attain the stable noble gas configuration.

Formation of a neutral compound

The metal and nonmetal form the neutral compound when there has been the formation of stable compound with the complete configuration.

The magnesium and lithium has been metals, while sulfur and bromine are nonmetals. Bromine has been the element of group 17. It has been able to gain an electron. Sulfur has been the nonmetal and required 2 electrons to complete its octet.

Lithium has been the metal with one valence electron, and magnesium with 2 valence electrons.

The neutral compound to be formed has been consisted of one metal with 2 valence electrons, and 2 nonmetals with 1 valence electrons.

Thus, the compound formed that has been neutral has been Magnesium and bromine. Thus, option D is correct.

Learn more about neutral compounds, here:

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Question 9(Multiple Choice Worth 1 points)
(05.03 LC)
Which of the following stars usually shine with the dimmest of light?
O Dwarfs
O Giants
O Main sequence stars
O Supergiants

Answers

main sequence starts maybe

Not sure but I think the main sequence stars

is A bond a chemical attraction between two atoms?

Answers

Answer:

Yes, a chemical bond is a lasting attraction between two atoms. (I am not completely sure what you mean, but I hope this helps!)

ILL GIVE U BRAINLYSIT

Answers

Answer:what?

Explanation:what? Huh

whoever answers first ill give brainliest! ANSWER QUICK PLS

Mr. B weighs out 22.8 grams of cobalt (II) chloride, then dissolves that CoCl2 in 500 mL of water. What is the concentration of his cobalt (II) chloride solution?
a. 3.51 M CoCl2
b. 0.351 M CoCl2
c. 0.176 M CoCl2
d. 0.0456 M CCl2

thank you so much!

Answers

Answer: b

Explanation: had the same question

Why is quantum of energy important?

Answers

Answer/Explanation:

quantum of energy is important because the energy of a particle, and also how long it has had that energy, with infinite precision. Quantum, in physics, discrete natural unit, or packet, of energy, charge, angular momentum, or other physical property. the term also applicable to quanta of other forms of electromagnetic energy such as X - rays and gamma rays.

When light moves from one substance to another, it can change direction. The following picture shows how this change can make an object in a glass of water seem to bend or even have disconnected pieces.

What is the term for this effect?

A.
transmission
B.
reflection
C.
refraction
D.
absorption

Answers

C. Refraction. When light enters a different medium, it changes direction due to change in speed and wavelength.

An apple, potato, and onion all taste the same if you eat them with your nose plugged

Answers

Hahaha is that one of the streak questions?

｡☆✼★━━━━━━━━━━━━★✼☆｡

✩✩✩

Hey, love!

You only get that little quote if your streak gets higher so, congrats on that!

Keep it up, stay lovely!

✩✩✩

what is the total number of atoms in 3.0 grams sample of neon?

Answers

The total number of atoms : N = 8.95 x 10²²

Further explanation

Given

3 grams of Neon

Required

The number of atoms

Solution

mol of Neon :

= mass : Ar Neon

= 3 g : 20,1797 g/mol

= 0.1487

The number of atoms :

N = n x No(No=Avogaro's number)

N = 0.1487 x 6.02 x 10²³

N = 8.95 x 10²²

HELP PLEASE IM GIVING BRAINLIST What is density?

Question 1 options:

the amount per unit volume of a particular material

the weight of water

a measure of salinity

the amount of salt in water

Answers

Answer:

The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume.

Explanation:

boom hope it helps

Answer:

the amount per unit volume of a particular material is the answer!

Explanation:

HELP! URGENTLY NEEDED! I NEED THIS ANSWER IN 5 MINUTES AND PERSON WHO HELPS GET THE ANSWER RIGHT GETS 25 POINTS!!! PLEASE I AM FAILING THIS CLASS AND NEED SO MUCH HELP!!!!

The coefficient/s will balance the chemical equation CH4 +O2 -------» CO2 + H2O is

a

1, 2, 1, 2

b

2, 1, 1, 2

c

2, 2, 1, 1

d

1, 1, 1, 2

Answers

Answer:

hey miss

Explanation:

The coefficients : a. 1,2,1,2

Further explanation

Given

Reaction(unbalanced)

CH4 +O2 -------» CO2 + H2O

Required

The blanced equation

Solution

Give a coefficient

CH4 +aO2 -------» bCO2 + cH2O

Make an equation

C, left=1, right=b⇒b=1

H, left=4, right = 2c⇒2c=4⇒c=2

O, left=2a, right=2b+c⇒2a=2b+c⇒2a=2.1+2⇒a=2

The equation becomes :

CH4 +2O2 -------» CO2 + 2H2O

Boron carbonate decomposes into boron oxide and carbon dioxide, how many moles of carbon dioxide are produced when 5.0 mol of boron carbonate decomposes completely?

Answers

Hope this is clear! Have a nice day.

LAB REPORT
Lab: Charles law
I don’t know how to do this someone pls help I’m so behind I’m crying

Answers

I don’t know the specifics of the lab but for a lab report you can find really good templates online. Start with an introduction that includes the question that the lab is trying to answer and include your hypothesis, your independent and dependent variables. Sometimes there may be a paragraph for any background information that was given previously but thats not always needed. Next paragraph have the material needed for the lab even if the lab is virtual and the procedures/ any safety guidelines that need to be included. Next paragraph have the data and any charts or graphs that were in the lab as well as your analysis of them. Say if your hypothesis was proven correct by the lab or not. Then have a concluding paragraph that restates the question that needed to be answered in the beginning, with the answer. Sometimes with the conclusion they may want a real world application for the results but again not necessarily. I hope this can help you. Good Luck!

Answer:

The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius

Explanation:

why is a moving car an example of kinetic energy

Answers

Kinetic energy which a body possesses by virtue of being in motion.

Answer:

the car is moving right so what does kinetic energy mean it means and object moving what is the car doing the car is MOVING

Will give brainliest if correct

Based on what you have observed in the Gizmo, which of the following chemical equations represents photosynthesis?

A. Carbon dioxide plus water yields glucose (sugar) and oxygen.
B. Oxygen plus carbon dioxide yields water and glucose.
C. Glucose plus oxygen yields carbon dioxide and water.
D. Water plus glucose yields oxygen and carbon dioxide.

Answers

Answer:

A.....

Explanation:

Carbon dioxide plus water yields glucose (sugar) and oxygen.

Other Questions

When Rukmani and Nathan approach the doctor who once employed their son, Murugan, they are most surprised that _____. There are 60,000 fans at the Super Bowl this year. If there is onehotdog vendor for every 375 fans, how many hotdog vendors arethere? WILL MARK BRAINLYIST use the figure to determine each angle measure Which algebraic expression represents the quotient of 7 and a number?StartFraction 7 Over n EndFraction7 + n7 n7 minus n HELPPP QUICKRead the excerpt from Early Victorian Tea Set.Among the upper classes, tea had been popular since before 1700. It received celebrity endorsement from Charles IIs queen, Catherine of Braganza, and from Queen Anne. It came from China, it was expensive, refreshingly bitter and drunk in tiny cups without milk or sugar. People kept their tea in locked tea caddies, as if it were a drug; for those who could afford it, it often was. In the 1750s Samuel Johnson confessed himself a happy addict:A hardened and shameless tea drinker, who has for twenty years diluted his meals with only the infusion of this fascinating plant, whose kettle scarcely has time to cool, who with Tea amuses the evening, with Tea solaces the midnights, and with Tea welcomes the morning.MacGregors main purpose in providing the quote is toexplain why only the upper classes could afford to drink tea.express his viewpoint on the importance of drinking tea often.illustrate how celebrities preferred their tea with sugar and milk.support his statement that people locked away their tea like it was a drug. Tiffany makes a round pizza. She wants to put a cheese layer on the pizza. If the pizza has a diameter of 18 cm, how many square cm of cheese layer does she need to put on the pizza? Hello can someone plss help me with this? What best describes how William Cody feels about his nickname, "Buffalo Bill"?A. He did not believe he deserved it.B. He was ashamed of it.C. He refused to be called by it.D. He was proud of it. which city did the Romans destroy at the end of the Third Punic War?The Roman Republic, 390 BCRoman RepublicCarthaginian EmpireThe GreeksPersian Empire solve the equation1/8 + c = 4/5 At the class party, each student will be given a container filled with 8 5/8ounces of juice. There are 25 students in the class. How many ounces of juicedoes the teacher need to buy? While I think learning a new language is one of the most exciting things about going abroad, I know many people would appreciate the comfort of easy communication while they are trying to adapt to a new culture in a place far from home. If this describes your personality, dont worry! Two of the most popular study abroad destinations are Great Britain and Australia.In the passage, the author is arguing __________________.a.that learning a language is the only reason to participate in study abroad programsc.that it is too difficult to learn a language while participating in a study abroad programb.that even students who do not speak a foreign language can study abroadd.all of the abovePlease select the best answer from the choices providedABCD Cellular membranes enclose a cell and its contents from its environment. Establish which of thefollowing comprises cellular membranes.A. LipidsB. RNAC. DNAD. Microsphere -10(x + 21) = -15x + 18What value of x makes the equation true? Imagine that you are a scientist who has discovered a new object. You want to find out if the object is biotic or abiotic. You observe several characteristics about the new object. Which of these characteristics would tell you that the object is abiotic, or not alive?(1 point)The object cannot create energy.The object has a crystalline structure.The object can mutate.The object responds to stimuli. Choro Mining is expected to generate the above free cash flows over the next four years, after which they are expected to grow at a rate of 3% per year. If the weighted average cost of capital is 7% and Conundrum has cash of $80 million, debt of $60 million, and 30 million shares outstanding, what is Choro's expected current share price Which should you avoid when writing a thesis statement? HINT: It's not AA. a broad statementB. a narrow statementC. plot summaryD. all of the above Which is larger, 12 kilometers or 7.5 miles? Show youre work plz ASAP!!!!! Can anyone help me plz???? Under what circumstances might it be legally justifiable to search students before allowing them entry into a school sports event or a school dance?" What should be the significant contribution of the society as well as the government in mitigating the hazards caused by climate change?