Which row represents an ion?
number of
protons
number of
neutrons
number of
electrons
А
1
0
1
B
3
4
3
C С
6
6
6
D
11
12
10​

Answers

Answer 1

Answer:

12123456789012347698


Related Questions

in need of correct answer por favor

Answers

Answer:

B

Explanation:

because HCl donates a proton to water. Therefore, HCl is an acid. H2O accepts a proton from HCl. Therefore, H2O is a base.

CaC0³ scientific name is?​

Answers

Answer:

CaC0³ scientific name is Calcium carbonate

Explanation:

Have a great summer :)

A certain element has two naturally occurring isotopes. The atomic mass of isotope 1 (35.4723 % natural abundance) is 184.9529 amu. Determine the atomic mass of isotope 2. The average atomic mass of the element is 186.2071 amu. Do not include units; report answer to 4 decimal places.

Answers

Answer:

the value

Explanation:

what does the periodic table allow chemist to do
a . organize compounds
b . develop atomic theory
c . predict properties of element
d . produce new elements

Answers

i would say b because they allow them to see how they elements work

The reaction of hydrogen with nitrogen to produce ammonia is shown below. If there are 3 moles of nitrogen, how many moles of hydrogen are needed to react completely with the nitrogen?

Answers

Answer:

9

Explanation:

I took the same test :)

The stoichiometry is important in chemistry which helps us to use the balanced equation to calculate the amount of reactants and products. Here the moles of hydrogen needed is 9. The correct option is B.

What is stoichiometry?

The quantitative study of the reactants and products involved in a chemical reaction is known as the chemical stoichiometry. The stoichiometric coefficients can be fractions including the whole numbers.  It helps to establish the mole ratio.

The stoichiometric coefficient is basically the number which is present in front of the atoms, molecules or ions. The stoichiometric calculations are also used in gravimetry and volumetry.

Here the balanced equation for the reaction is:

N₂ + 3H₂ → 2NH₃

Number of moles of H₂ = 3 mol N₂× 3 mol H₂  / 1 mol N₂ = 9 mol H₂

So the number of moles of H₂ is 9.

Thus the correct option is B.

To know more about stoichiometry, visit;

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a buffer solution is prepared by adding NH4Cl to a solution of NH3 (ammonia). what happens if NaOH is added?

NH3(aq)+ H2O(l) = NH4+(aq) +OH- (aq)​

Answers

Answer: The reaction proceeds in the backward direction.

Explanation:

A buffer is a solution that maintains the pH of the solution and resists any significant changes of pH on the addition of acid or alkali.

A buffer solution of [tex]NH_4Cl\text{ and }NH_3[/tex] is prepared. It is a basic buffer as it is formed by the combination of a weak base [tex](NH_3)[/tex] and its conjugate acid [tex](NH_4Cl)[/tex]

When a strong base (NaOH) is added to this buffer solution, the ammonium ions releases hydrogen ion to the solution which then combines with the hydroxide ions to form water and ammonia in a solution. Thus, maintaining the pH of the buffer.

The given chemical equation follows:

[tex]NH_3(aq)+H_2O(l)\rightleftharpoons NH_4^+(aq)+OH^-(aq)[/tex]

Hence, the reaction will proceed in the backward direction.

When NaOH is added to this buffer solution it forms water and ammonia.

A buffer is a solution that maintains the pH of the solution and maintains the pH on the addition of acid or alkali.

A buffer solution of [tex]NH_4Cl[/tex] and [tex]NH_3[/tex] is is a basic buffer as it is formed by the combination of a weak base and its conjugate acid.

When a NaOH which is a strong base is added to this buffer solution, the ammonium ions release hydrogen ion which combines with the hydroxide ions to form water and ammonia helps maintain the pH of the buffer.

 

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5. Discuss the phenomena of sunrise and sunset seen on Earth and describe how they will be different from the perspective of outer space. PLS IM OFFERING13 STARS WHICH IS ALL OF MY STARTS PLEASEEE

Answers

Despite its appearance, air has a ‘thickness’ so when the sun is high in the sky the light travels through the air on a very much shorter path than when it is low on the horizon.

Imagine that air water and you are below the surface, the light from an overhead sun will be quite sharp and bright, but if lower in the sky it will have to travel through much more water to reach you, so will look less bright and sharp. It ma not seem the same, but the atmosphere is just like very thin water, and a low lying sun will be drastically reduced in strength, so all you will see is a sun with a shift to the red end of the spectrum as all the actinic part will be filtered away by that thicker atmosphere.

Ventilation is governed by Boyle's Law, which states that at a constant temperature Multiple choice question. the solubility of a gas is inversely proportional to its volume. the pressure of a gas is directly proportional to its volume. the pressure of a gas is inversely proportional to its volume. the solubility of a gas is directly proportional to its volume.

Answers

Answer:

the pressure of a gas is directly proportional to its volume.

Explanation:

Robert Boyle was an Irish chemist and is famously referred to as the first modern chemist. He was born on the 25th of January, 1627 in Lismore, Ireland and died on the 31st, December 1691, London, United Kingdom.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

[tex] PV = K[/tex]

[tex] P_{1}V_{1} = P_{2}V_{2} [/tex]

Where;

P1 is the original pressure.

P2 is the final pressure.

V1 is the original volume.

V2 is the final volume.

This ultimately implies that, ventilation which is typically governed by Boyle's Law, which states that at a constant temperature the pressure of a gas is directly proportional to its volume.

Match the parts of the nervous system with their functions.
cerebrum
brain stem
cerebellum
meninges
regulating breathing

memorizing a telephone number

dancing

protecting the central nervous system

Answers

brain stem is the system of the nervous system

Find the area of the sector with a central angel of 120 and a radius of 8 inshces. Leave in terms of pie

Answers

Answer:

A = 66.98 square in.

Explanation:

The Area of a sector is given by the formula

[tex]A = \frac{\theta}{360}\times \pi r^2[/tex]

here θ is the central angle and r is the radius

given that θ = 120° and radius =  8 inches

[tex]A = \frac{120}{360}\times3.14\times 8^2[/tex]

A = 66.98 square in.

The sun revolved around the earth why ? help me ​

Answers

Answer:

You are moving because the Earth and everything in our solar system is constantly moving. ... As the Earth rotates, it also moves, or revolves, around the Sun. The Earth's path around the Sun is called its orbit. It takes the Earth one year, or 365 1/4 days, to completely orbit the Sun.

Answer:

um lol i think you mean  Why does the earth revolve around the sun

its because the  that the gravity of the Sun keeps the earth  in its orbit  

Explanation:

hope this helps!

which functional group defines an alcohol?
= O
-Na
-OH
-P04

Answers

The functional group which defines an alcohol is OH.

Vinegar, which contains acetic acid, is used in foods and has few safety concerns​. Hydrochloric acid is used in chemistry labs and requires the use of safety goggles and gloves. Why do the safety concerns for these two acids differ? 2 ... Acetic acid is a weak acid, and hydrochloric acid is a strong acid.

Answers

Answer:

acid

Explanation:

Which of these takes place when a chemical change occurs? option 1: Bonds connecting atoms in products and reactants form. option 2: Bonds connecting atoms in products and reactants break. option 3: Bonds connecting atoms in reactants break, and bonds connecting atoms in products form. option 4: Bonds connecting atoms in reactants form, and bonds connecting atoms in products break.

Answers

Answer: Out of the given options bonds connecting atoms in reactants break, and bonds connecting atoms in products form are the changes which takes place when a chemical change occurs.

Explanation:

A change that leads to the change in chemical composition of a substance is called a chemical change.

For example, [tex]2NH_{3} \rightarrow N_{2} + 3H_{2}[/tex]

Here, bond between the reactant atoms nitrogen and hydrogen is broken down.

On the other hand, bond connecting the products that is [tex]N_{2}[/tex] and [tex]H_{2}[/tex] is formed.

Thus,, we can conclude that out of the given options bonds connecting atoms in reactants break, and bonds connecting atoms in products form are the changes which takes place when a chemical change occurs.

Enough nitrogen must be generated in the bag to create a total pressure of 2.56 atm, which then drops as the bag slowly deflates. Assuming the volume of the bag is 56.0 L and the temperature in the car is 25oC, calculate the molar quantity (number of moles) of N2 that must be generated.

Hint: Use Ideal gas law PV=nRT (Ideal gas constant R=0.080 L.atm/mol.K)

Answers

Answer:

The number of moles is 6.01 moles.

Explanation:

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

In this case:

P= 2.56 atmV= 56 Ln= ?R= 0.080 [tex]\frac{atm*L}{mol*K}[/tex]T= 25 C= 298 K (being 0 C= 273 K)

Replacing:

2.56 atm* 56 L= n* 0.080 [tex]\frac{atm*L}{mol*K}[/tex]* 298 K

Solving:

[tex]n=\frac{2.56 atm*56 L}{0.080\frac{atm*L}{mol*K}*298 K}[/tex]

n= 6.01 mol

The number of moles is 6.01 moles.

Which statement accurately describes a P wave?

Answers

Answer:

A P wave can move through solid rock only. P wave can travel through liquid accurately describes a P wave.

I
I-U-I
I-U-I
H
-U-I
H-C-HH-C-H
I
U-U-I
Ti
I-U-I

Answers

c. m c a nil xxeese

The
volume
occupied by 5.0g in neon
03368 atm and
a temperatureof
35°C will be?​

Answers

Answer:

uryehrufurudududjehshsyshzyyxzhsu

a. Is lithium (Li) more or less reactive than beryllium (Be)?

Answers

Answer:

Li is more reactive then Be.

Explanation:

As you go to the farther left and down on the periodic table, the higher that element reactivity is.

Calculate weight of anhydrous compound from remains upon dehydration of 2g copper sulphate pentahydrate

Answers

Answer:

1.28 g

Explanation:

Mass of anhydrous compound/molar mass of anhydrous compound = mass of hydrated compound/ molar mass of hydrated compound

Mass of anhydrous compound = ?

Mass of hydrated compound = 2g

Molar mass of anhydrous compound= 160 g/mol

Molar mass of hydrated compound = 250 g/mol

x/160 = 2/250

250x = 2 ×160

x= 2 × 160/250

x= 1.28 g

A student needs to make a solution of 308 mL of 0.02 M of Copper (II) Sulfate. All they have available is a solution of 0.250 M. How many liters should they use?

Answers

Answer:

this link not hacl belive me

https://www.flinnsci.com/api/library/Download/18ce587821c24fb3b0ad7d878bd6a3d9Explanation:

HELP PLEASEEEEE HURRY!!

Answers

Answer:

The answer is c

3KOH + FeCl3 → Fe(OH)3 + 3KCl
How many moles of Fe(OH)3 are produced along 7.5 moles of KCl?

Answers

Answer:

2.5moles of Fe(OH)3

Explanation:

i don't know how to explain this

I might honestly fail miserably on my chemistry final tomorrow. Would anyone be able to give some last-minute advice?

Answers

Just do the best you can. That’s all that matters in the end!

The diagram below represents changes in the types of plants growing in the same area during four different time periods. Different types of plants
have been labeled for each time period.oo
Hardwood trees
Softwood trees
Small plants and
shrubs
Grasses
kanmummimaturday
Time
This change in plant types over time is an example of

Answers

Answer:

ecological succession

Explanation:

Answer:

ecological succession

Explanation:

I did this before


Beryllium is in Group 2.
What does this tell you about the electronic structure of beryllium?

Answers

Answer:

[He] 2s²

Explanation:

Determine the volume of a helium balloon given the balloon was filled from a container 0.15L of gas at 2 atm if the new pressure is 0.97 atm. Assume constant temperature.

Answers

Answer:

The volume of the helium balloon is 0.306 L.

Explanation:

Boyle's law states that the volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure. That is, if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Mathematically, Boyle's law indicates that the product of pressure and volume always has the same value:

P*V= k

Assuming that you have a certain volume of gas V1 that is at a pressure P1 at the beginning, by varying the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:

P1*V1= P2*V2

In this case:

P1= 2 atmV1= 0.15 LP2= 0.97 atmV2= ?

Replacing:

2 atm* 0.15 L= 0.97 atm* V2

Solving:

[tex]V2= \frac{2 atm* 0.15 L}{0.97 atm}[/tex]

V2= 0.306 L

The volume of the helium balloon is 0.306 L.

Método científico: El trabajo científico se caracteriza por ser planificado, con objetivos iniciales y que habitualmente se dan en un cierto orden.1) Indica cuáles son los pasos del método científico explicando brevemente cada uno de ellos.2) Los siguientes son dos modelos : *Un estudiante pensando en la competencia, desarrolla un proyecto en el sótano de su casa. *Un grupo de personas con diferentes aptitudes cooperan para resolver un problema. ¿Cuál de ellos es mejor para el trabajo científico? ¿Por qué?

Answers

Answer:

Ver explicación

Explanation:

El método científico se refiere al patrón establecido de resolución de un problema científico. Los siguientes son pasos importantes en el método científico;

Haz una observación.

formular preguntas relevantes.

elabore una hipótesis que pueda ser probada.

Diseña un experimento.

Prueba la hipótesis usando tu diseño experimental.

Teniendo en cuenta ambos escenarios, el último caso en el que estudiantes de diferentes capacidades trabajan juntos para resolver un problema refleja mejor el método científico porque pueden hacerse preguntas entre sí y llegar a hipótesis comprobables que pueden demostrarse como verdaderas o falsas mediante experimentos.

Un gas ocupa un volumen de 358L a 152°C y 470 mmHg ¿Qué volumen ocupara el gas, si la temperatura aumente a 500 K y 6 atm?

Answers

Answer:

42 L

Explanation:

de los parámetros en la pregunta;

V1 = 358L

T1 = 152 ° C + 273 = 425 K

P1 = 470 mmHg × 1 atm / 760 mmHg = 0.6atm

V2 =?

P2 = 6 atmósferas

T2 = 500 K

P1V1 / T1 = P2V2 / T2

P1V1T2 = P2V2T1

V2 = P1V1T2 / P2T1

V2 = 0,6 × 358 × 500/6 × 425

V2 = 107400/2550

V2 = 42 L

What happens to the freezing point of a solution when more solute is added?

Answers

Answer:

Explanation:

Freezing point depression is the phenomena that describes why adding a solute to a solvent results in the lowering of the freezing point of the solvent.  Adding solute to a solvent will essentially dilute the solvent molecules

Answer:

The freezing point decreases

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Please someone help!Thanks! A third-grade bilingual teacher, Mr. Rivas, reads aloud a procedure for a student science investigation. After reading aloud the procedure, he notices that the students are confused about how to begin their investigation. Mr. Rivas then decides to repeat the procedure step-by-step, modifying the language used in the written instructions so that it is more comprehensible to the students. Which of the following does Mr. Rivas best demonstrate by modifying the lesson?A. Scaffolding instructional techniqueB. Reciprocal teaching instructional technique C. Sheltered English instructional strategyD. Concept attainment instructional strategy Choose the adjective that BEST describes Sundiata (First ruler of Mali)A. Ruthless B. CunningC. KindD. Patient Patrick wanted to gather data about the cost of joining a community pool in his area. He plotted the data and determined that the average community pool membership cost consists of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 40.Identify and interpret the y-intercept in this model. A measure of risk-adjusted performance that is often used is the Sharpe ratio. The Sharpe ratio is calculated as the risk premium of an asset divided by its standard deviation. The standard deviations and returns of the funds over the past 10 years are listed here. Calculate the Sharpe ratio for each of these funds. Assume that the expected return and standard deviation of the company stock will be 16 percent and 58 percent. Calculate the Sharpe ratio for the company stock. How appropriate is the Sharpe ratio for these assets? When would you use the Sharpe ratio?10-YEAR ANNUAL RETURN STANDARD DEVIATION Bledsoe S&P 500 Index Fund 10.15% 23.85%Bledsoe Small Cap Fund 14.83 29.62Bledsoe Large Company Stock Fund 11.08 26.13Bledsoe Bond Fund 8.15 10.34 interesting biology project topic Which of the following was not a problem caused by industrialization Thief catchers were hired during thecrime wave in England during the 18thand 19th centuries and were identifiedas: Which statement about the impact of twentieth-century technology is correct?A.Technology has eliminated famine throughout the world.B.BTechnology has accelerated the pace of cultural diffusion.C.Technology has led to the rapid deregulation of the global economy.D.Technology has hindered the economic development of many nations. Eric, Teri, and Jana formed a partnership. Their cash contributions were $60,000 by Eric, $36,000 by Teri, and $24,000 by Jana. Jana will be responsible for 80% of day-to-day operations. Teri has unlimited liability, and each of the other partners is liable for 25% of the partnership debt. If the partnership agreement does not state how profits are to be shared, the Revised Uniform Partnership Act (RUPA) provides for which arrangement Please help! in need ASAP! Find an equation of a line that is parallel to 2x+3y=6 and passes through the point (4, 4) Which best describes the inventor of a triangle? X-Mart purchased $300 of merchandise and paid immediately. Demonstrate the journal entry to record this transaction, assuming the perpetual inventory system is used. Multiple choice question. Debit Purchases $300; credit Cash $300. Debit Merchandise Inventory $300; credit Cash $300. Debit Merchandise Inventory $300; credit Sales $300. Credit Merchandise Inventory $300; debit Cash $300. fill in the missing digits pls asap Your company has a policy to use long-term debt to finance inventory and receivables. A. This is a restrictive short-term financing policyB. This policy has higher carrying cost C. This policy has higher shortage cost D. This policy leads to higher default risk calculate the pressure in atm of .68 mol of H at 298K and occupying 4.5 L [tex]f(x)=\sqrt(x) \\ g(x)=\sqrt((4)/(5)x)[/tex]Identify a horizontal or vertical stretch or compression of the function f(x)=\sqrt(x) by observing the equation of the function g(x)=\sqrt((4)/(5)x)A. A vertical compression by a factor of 5/4B. A horizontal compression by a factor of 5/4C. A horizontal stretch by a factor of 5/4D. A vertical stretch by a factor of 5/4 A number cube is rolled once. What is the probability of rolling a three help help please help help