someone help please i cant figure this out

Someone Help Please I Cant Figure This Out

Answers

Answer 1

Answer: 2 : 1

Explanation:

Cation :

Ca - calcium = atomic number = 20

Electron dot configuration : 2, 8, 8, 2

Ca losses 2 electrons in its outermost shell and thus has a charge of 2+ in other to attain a stable octet state.

Anion:

F - has 7 valence electrons and thus needs 1 electron to achieve a stable octet state, hence it accepts one electron has has a charge of (-1)

Therefore,

Ratio of cation (+) to negative (-) = 2 :1


Related Questions

I NEED HELPPPP

Samantha can do 6 back handsprings in 18 seconds. How many back handsprings can she do per second?

Answers

Answer:

3 Handsprings

Explanation:

18 divided by 6 is 3

If one person reacts to something in a certain way, that means ALL people will react to the
same situation in the same way (Johnny gets stung by a bee, now he kills every bee he sees).
O TRUE
O FALSE

Answers

Hi there,

My answer would be False.

Please mark

Thanks

The statement is false that if one person reacts to something in a certain way, that means ALL people will react to the same situation in the same way (Johnny gets stung by a bee, now he kills every bee he sees).

What makes this statement false?

According to this question, if one person reacts to something in a certain way, that means ALL people will react to the same situation in the same way.

An example then states that Johnny gets stung by a bee and begins to kill every bee he sees.

This statement is false because when Johnny gets stung by a bee, everyone should react to the situation the same way Johny Johnny did.

Learn more about false statements at: https://brainly.com/question/24701431

2C8H18 + 25O2 → 16CO2 + 18H2O reaction type

Answers

Answer:

Combustion

---

Answer:

This is not a redox reaction. It is an example of combustion.

Explanation:

Can someone help me with questions 4-5
21 points

Answers

4. describe three ways carbon dioxide was removed from the Earth's atmosphere.

Answer: Forests: Photosynthisis helps clear carbon dioxide naturally, Soils naturally store carbon, but agricultural soils are running a big deficit due to intensive use. Because agricultural land is so expansive, Bio-energy with Carbon Capture and Storage (BECCS) is another way to use photosynthesis to combat climate change. However, it is far more complicated than planting trees or managing soils — and it doesn’t always work for the climate.

5. Explain why there is now 21% Oxygen in the Earth's atomosphere compaired to little or no Oxygen in the Earth's atmosphere 4.5 billion years ago.

Answer: cientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth's existence.The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. There were smaller proportions of water vapour, ammonia and methane. As the Earth cooled down, most of the water vapour condensed and formed the oceans.

Sorry its soooo long TwT

what is the systematic name of NaCl​

Answers

Answer:

The answer is Sodium chloride.

Na is sodium and Cl is chlorine.

What must be present in order for
electricity to flow?

A. positive and negative charges

B. an electrical outlet

C. Neutrons

D. water

Answers

Pretty sure it’s A.

!!PLS HELP ASAP!!

In the process of creating ammonia (NH3), nitrogen gas (N2 ) is combined with hydrogen gas (H2) that is extracted from hydrocarbons such as methane (CH4) or propane (C3H8) gas. Manufacturers must determine the appropriate amount of each reactant so as to produce the highest yield of product.
The balanced reaction for ammonia is below:
N2+2H3→2NH3

Explain why determining the limiting reactant is important to a manufacturer trying to produce NH3 and the effect of running out of reactant.

Answers

pooopppppppppppnhjjnjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

I need help. Please be honest

Answers

Mass of Oxygen : 8.0 g

Further explanation

Given

1.51 x 10²³ molecules of Oxygen(O₂)

Required

Mass of Oxygen

Solution

1 mol = 6.02 x 10²³ particles(molecules, atoms, ions)

Can be formulated :

N = n x No

n = moles

No = Avogadro's number

Find moles of Oxygen :

n = N/No

n = 1.51 x 10²³ / 6.02 x 10²³

n = 0.251

Mass of Oxygen :

mass = mol x MW O₂

mass = 0.251 x 32 g/mol

mass = 8.032≈ 8.0 g

The mass per mole of a substance is called its molar mass.

True or false ​

Answers

The molar mass of a substance is the mass in grams of one mole of that substance. This mass is given by the atomic weight of the chemical unit that makes up that substance in atomic mass units....

hope that helps

so i think that it is false  because base on the statement above si the decision is yours just read it thanx

Why is water considered a pure substance but orange juice a compound?

Answers

orange juice contains particles of solid (pulp) and water only contains one type of molecule & is not a mixture .

Answer: A mixture is when two or more substances combine physically together. However, in water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone. Therefore, water is not a mixture; it is a compound and it is pure. A Orange juice contains particles of solid (pulp) as well as liquid; it is not chemically pure. B Because its composition is not uniform throughout, orange juice is a heterogeneous mixture. A Aluminum oxide is a single, chemically pure compound. A Selenium is one of the known elements.

Hope this helps :)

Rank the following elements from highest to lowest ionization energy.

I, Cl, F, Br


Help plsssss:(

Answers

Answer:

F

Cl

Br

I

Explanation:

Br=11.81...

Cl=12.96...

F=17.42...

Iodine=10.45

What does the term periodic mean?

Answers

Answer:

relating to the periodic table of the elements or the pattern of chemical properties that underlies it.

Explanation:

Answer:

Periodic refers to properties that repeat at certain intervals. Explanation: The elements on the periodic table repeat at intervals called periods.

Explanation:

4Al + 3O2 —> 2Al2 O3
10.7g of powdered Al is placed into a container containing 10.7g O2. What is the limiting reactant? How many grams of aluminum oxide can be produced? Calculate the mass of excess reactant that remains after the reaction is complete

Answers

Limiting reactant : Al

Al2O3 produced = 18.36 g

mass O2 remains = 11.904 g

Further explanation

Given

Reaction

4Al + 3O2 —> 2Al2O3

10.7 g O2

Required

Limiting reactant

mass Al2O3

Mass of excess reactant remains

Solution

mol Al : 10.7 : 27 = 0.396

mol O2 = 10.7 : 32 = 0.334

1. limiting reactant

mol : coefficient of Al : O2 = 0.396/4 : 0.334/3 = 0.099 : 0.111

Al as a limitng reactant(smaller ratio)

2. mass Al2O3

mol Al2O3 based on Al : 2/4 x 0.396 = 0.18

mass Al2O3(MW=102 g/mol) = 0.18 x 102 = 18.36 g

3. mass O2 remains

mol O2 reacted : 3/4 x 0.396 = 0.297

mol O2 remains = 0.669 - 0.297 =0.372

mass O2 remains = 0.372 x 32 = 11.904 g

chemist's found that a complex reaction occurred in three steps. the first step takes 2.5140 * 10^2s to complete, the second step takes 1.40 * 10^-1s, and and the third step takes 7.397 * 10^1s. what is the total amount of time elapsed during the reaction?​

Answers

Answer:

The total amount of time elapsed during the reaction is 2.5227 × 10²s

Explanation:

The total amount of time elapsed in this reaction would be to add the (three) individual time taken together: t = t₁ + t₂ + t₃

(2.514 × 10²s) + (1.4 × 10⁻¹s) + (7.397 × 10¹s) = 252.2797 ⇔ 2.5227 × 10²s

When KOH dissolved in ethanol, what is the intermolecular
attraction between OH ions and C2H5OH molecules?

a. Dipole-dipole
b. ionic attraction
c. London dispersion forces
d. lon-dipole
e. Covalent bonds

Answers

Answer: d. Ion-dipole

Explanation:

PLZ ANSWER REALLY FAST NO JOKES

A piece of nickel at 25 °C is dropped into a glass of water at 25 °C. Which statement is correct?

Heat will flow from the nickel to the water in the glass.
Heat will flow from the water in the glass to the nickel.
There will be no transfer of heat from the nickel to the water in the glass.
The final temperature of water and nickel will be 0 °C.

Answers

Answer:

The temperature of the water in both beakers will decrease

Explanation:

Answer:

I believe it's C. "There will be no transfer of heat from the nickel to the water in the glass."

Explanation:

there won't be any transfer of heat from the nickel to the water in the glass because both the nickel and the glass of water are at the same temperature.

A stone weighs 105 lb in air. When submerged in water, it weighs 67.0 lb. Find the volume and specific gravity of the stone.

Answers

Don’t knowwwwwwwwwww?

How many moles are in 3.45 g of Ba(CIO3)2 ?

Answers

Answer:

0.0113 mol Ba(ClO₃)₂

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structures

Reading a Periodic TableUsing Dimensional AnalysisExplanation:

Step 1: Define

3.45 g Ba(ClO₃)₂

Step 2: Identify Conversions

Molar Mass of Ba - 137.33 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Ba(ClO₃)₂ - 137.33 + 2(35.45) + 6(16.00) = 304.33 g/mol

Step 3: Convert

Set up:                              [tex]\displaystyle 3.45 \ g \ Ba(ClO_3)_2(\frac{1 \ mol \ Ba(ClO_3)_2}{304.33 \ g \ Ba(ClO_3)_2})[/tex]Multiply/Divide:                [tex]\displaystyle 0.011336 \ mol \ Ba(ClO_3)_2[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.011336 mol Ba(ClO₃)₂ ≈ 0.0113 mol Ba(ClO₃)₂


Which part of the wave is the arrow pointing to?
A. Rarefaction
B. Compression
C. Wavelength
D. Crest

Answers

B I am pretty sure.

Answer:

A. Rarefaction

Explanation:

CO2(g) + H2O(I) - -> C6H12O6(s) + O2(g)

How many of the chemicals in the equation above are aqueous? #only

Answers

Answer:

For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but PhC2H5 + O2 = PhOH + CO2 + H2O will; Compound states [like (s) (aq) or (g)] are not required. If you do not know what products are enter reagents only and click 'Balance'. In many cases a complete equation will be suggested.

Explanation:

It is easy to know what someone is thinking by the way the behave (act):
TRUE
FALSE

Answers

Yes it is true because they act and behave the same way

HELP ME PLEASE. I DONT HAVE MUCH TIME LEFT!


Select the correct answer. Which molecule has polar bonding and is nonpolar? OA H₂O OB. BF3 OC. NH3 OD. NC13 O E. CH₂Cl2​

Answers

Answer:

B. is your correct answer

Explanation:

which layer of the earth has the lowest density

Answers

Answer:

lithosphere

Explanation:

Earth's interior layers are ordered by density. The densest layer is the solid metal inner core, the mantle is of intermediate density, and the least dense layer is the lithosphere, particularly the continental lithosphere.

The crust is the layer of the earth with the lowest density.

The crust is the rock layer that is the lightest and most buoyant on Earth. 41% of the Earth's surface is covered by continental crust, with a quarter of that covered by ocean floor. The thickness of the continental crust is 20 to 80 kilometers. Four billion years of Earth's history are stored in its rocks.

The crust is the outermost layer of the Earth, and it is only about 5-70 km deep. The mantle is the layer beneath the crust, which is about 2,900 km thick and has a thickness that varies. The core is divided into two sections: the inner core, which is solid, and the outer core, which is liquid. The Earth's surface is made up of several plates, which are continuously changing due to forces within the Earth.

Know more about crust:

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Please help I’m confused

Answers

answer: i believe it’s the second one !

Categorize the following reaction: CH4 + O2 ---> CO2 + H2O *


Synthesis Reaction

Combustion Reaction

Replacement Reaction

Decomposition Reaction

Answers

Answer:

combustion reaction

Explanation:

combustion reactions have the end products H20 and C02

Calculate the number of formula units of KMnO4 in 100 mols

Answers

Answer:

100 moles of KMnO₄ contain 602.2 × 10²³ formula units.

Explanation:

Given data:

Number of moles of KMnO₄ = 100 mol

Number of formula units = ?

Solution:

The given problem will be solved through Avogadro number.

1 mole contain = 6.022 × 10²³ formula units

100 mol  × 6.022 × 10²³ formula units / 1 mol

602.2 × 10²³ formula units

Thus, 100 moles of KMnO₄ contain 602.2 × 10²³ formula units.

Name the type of reaction shown:2C4H10+13O2=8CO2+10H2O

Answers

Answer: It is AN combustion

reaction.

Explanation:

calculating kinetic energy 1200kg car moving at 10​

Answers

Answer:

60000J

Explanation:

Given parameters:

Mass of car  = 1200kg

Speed  = 10m/s

Unknown:

Kinetic energy  = ?

Solution:

The kinetic energy is given as:

   Kinetic energy  = [tex]\frac{1}{2}[/tex]  m v²  

Now insert the parameters and solve;

   m is the mass

    v is the velocity  

 Kinetic energy  =  [tex]\frac{1}{2}[/tex] x 1200 x 10²   = 60000J

Explain what happens as a puddle dries after a rainstorm.

Answers

After a Rainstorm the puddle than starts to evaporate. Going into the air as the water vapor turns from liquid to gas as they begin to form a cloud it repeats the cycle again but there is more to the water cycle but that’s a simple answer for your question.

The process by which a cell takes in a large particle is called

A
endocytosis.

B
diffusion.

C
active transport.

D
exocytosis.

Answers

Answer:

A endocytosis

Explanation:

The process by which a cell takes in a large particle is called endocytosis. Therefore, the correct option is option A.

What is endocytosis?

Endocytosis is the procedure by which molecules are actively transported into the cell by being engulfed by its membrane. All cells use endocytosis and exocytosis to transport substances that cannot passively cross the membrane. Exocytosis serves the opposite purpose by ejecting molecules from the cell.

The requirement for homeostasis ensures an equal flow all molecules into and out of a cell, like all of the body's systems. This indicates that the number of molecules exocytosis and endocytosis both equal the number of molecules into the cell. The two systems work together to maintain a balance between nutrients and waste that is necessary for normal cell growth and function. The process by which a cell takes in a large particle is called endocytosis.

Therefore, the correct option is option A.

To know more about endocytosis, here:

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