Which of the following has the smallest atomic radius?

A. Rb
B. K-¹
C. k
D. Rb+¹

Answers

Answer 1

Answer:

K

Explanation:


Related Questions

Mg(OH)2 + 2HNO3 → Mg(NO3)2 + 2H20

If 375.96 grams of H20 are produced, how many grams of HNO reacted? PLS NO LINKS AND ILL GIVE BRAINLIEST

Answers

Answer:

A. 1350

You multiply 18.21HNO3* 1mol MgN2O6 * 148.30MgN2O6

Then divide it by the 2mol HNO3 to get 1350

Read the temperature in the image:
Is it 18.7?

Answers

Answer:

yes it is 18.7

Calculate the concentration of hydrochloric acid if 50.0 mL of hydrochloric acid is neutralized by 25.0 mL of 2.0 M sodium hydroxide. The neutralization reaction is shown below HCl + NaOH > H2O + NaCl

Answers

Answer:

1.0M HCl is the concentration of the acid

Explanation:

Based on the reaction, 1 mole of NaOH reacts per mole of HCl. That means the moles added of NaOH in the neutralization = Moles of HCl in the solution. With the moles and the volume in Liters we can find the molar concentration of HCl

Moles NaOH = Moles HCl:

25.0mL = 0.025L * (2.0moles / L) = 0.050moles HCl

Molarity:

0.050moles HCl / 0.0500L =

1.0M HCl is the concentration of the acid

What theoretical yield of NaCl would result from reacting 3.00 moles of Na2CO3 with excess HCl (aqueous)?

Answers

Answer:

350.7 g of NaCl

Explanation:

For this reactions our reactants are:

HCl and Na₂CO₃.

Then, the reaction is:

2HCl + Na₂CO₃ →  2NaCl  +  H₂CO₃

2 moles of hydrochloric acid react to 1 mol of sodium carbonate in order to produce 2 moles of salt and 1 mol of carbonic acid.

Ratio is 1:2. 1 mol of sodium carbonate can produce 2 moles of NaCl

Then, 3 moles of carbonate may produce (3 . 2) /1 = 6

We convert the moles to mass to determine the theoretical yield

6 mol . 58.45g /mol = 350.7 g

The theoretical yield of NaCl produced is 350.7 g.

What is NaCl?

NaCl is a salt, and it is an ionic compound.

The reaction is

[tex]\rm 2HCl + Na_2CO_3 \rightarrow 2NaCl + H_2CO_3[/tex]

2 mol of HCl reacts with 1 mol of [tex]Na_2CO_3[/tex] and produces 2 mol of NaCl and 1 mol of [tex]H_2CO_3[/tex].

The ratio will be [tex]Na_2CO_3[/tex] : NaCl

                                1 : 2

Then, for 3 mol of [tex]Na_2CO_3[/tex]

[tex]\dfrac{3 \times 2}{1} = 6[/tex]

Now, convert the moles to mass

[tex]6\; mol \times 58.45g /mol = 350.7 g[/tex]

Thus, the theoretical yield produced is 350.7 g.

Learn more about NaCl

https://brainly.com/question/1473063

How is energy from grass passed on between animals

Answers

Answer:

its nuber 3

wdPDAPS

Explanation:

What causes the release of energy in an exothermic reaction? Bonds breaking Bonds breaking A catalyst A catalyst Bonds being formed Bonds being formed Electrons escaping the bond

Answers

Answer:

weak bonds break and strong bonds form

Explanation:

An exothermic reaction is a chemical reaction in which heat energy is evolved during the reaction process.

Bond formation requires energy while bond breakage releases energy. More energy is needed for the formation of weak bonds as compared to strong bonds.

Hence, when weak bonds break, they release more energy than needed to make a corresponding strong bond leading to the release of the remaining energy as heat.

what color does blue and cyan pigment make?

Answers

Answer:

Teal

Explanation:

Blue lightens the cyan.

Teal Beacuse it make it lighter

A student titrated 50 cm of sulphuric acid (H2SO4)of an unknown concentration
in a flask with sodium hydroxide (NaOH).
The acid required 30 cm3 of 0.500 mol/dm3 NaOH to reach the end point
H2SO4(aq)
+ 2NaOH(aq)
Na2SO4(aq) + 2H2O()
Calculate the concentration the acid.
Concentration =
mol/dm3​

Answers

No. of mol. of NaOH used: (30/1000)*0.5= 0.015mol
Mole ratio of NaOH:H2SO4= 2:1
No. of mol. of H2SO4: 0.015/2= 0.0075mol
Conc. of acid= 0.0075/(50/1000)= 0.15moldm^-3

Hope it helps, drop a thanks

Describe how temperature changes the average Molecular kinetic energy?

Answers

an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often.

According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often. If the reaction is kept at constant pressure, they must stay farther apart, and an increase in volume will compensate for the increase in particle collision with the surface of the container.

hope this helps!

could i get brainiest?

what are the respective coefficients needed to balance the equation below _N2(g) + _H2(g) --> _NH3(g)

Answers

This is the answer:
N2+3H2=2NH3

In the balanced equation, the mass of reactant is exactly equal to the mass of product. The respective coefficients needed to balance the equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

What is balanced equation ?

A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.

Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.

The Law of Conservation of Mass is followed by a balanced equation. This is a crucial scientific guiding principle. Finally, a balanced equation enables us to forecast the quantity of reactants and products that will be produced. Sort of crucial if you're attempting to determine how much fuel to supply a spacecraft traveling to Mars

Thus, the balanced equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

To learn more about balanced equation, follow the link;

https://brainly.com/question/7181548

#SPJ2

A 1.5 L pocket of air with a temperature of 295 K rises in the atmosphere. What will be the volume of the air pocket of the t temperature decreased to 2 celsius and the pressure is not changed.

Answers

Answer:

1.4 L.

Explanation:

Applying Charles law,

V/T = V'/T'....................... Equation 1

Where V = Initial volume, V' = Final volume, T = Initial Temperature in Kelvin, T' = Final Temperature in Kelvin.

Make V' the subject of the equation

V' = (V/T)T'..................... Euqation 2

Given: V = 1.5 L, T = 295 K, T' = 2 °C = (2+273) K = 275 K

Substitute these values into equation 2

V' = (1.5/295)275

V' = 1.398

V' ≈ 1.4 L

9
If you wanted to make 250 mL of a 0.01 M solution of CaCl, calculate how many moles of calcium chloride would be
needed. Your response must include both a correct numerical setup and the calculated result. [1]

Answers

Answer:

0.0025moles

Explanation:

Molarity of a solution (M) = number of moles (n) ÷ volume (V)

According to this question, to make 250 mL of a 0.01 M solution of CaCl, the following number of moles is needed:

Volume = 250mL = 250/1000 = 0.250Litres.

Using; molarity = n/V

0.01 = n/0.250

n = 0.0025

n = 2.5 × 10^-3 moles.

Describe how urine is formed, beginning with the blood. In 5th grade language please​

Answers

Answer:

kidneys takes the waste out of the blood. It is then stored in the bladder, until the urinary tract takes the urine out of the body.

9. Why do bees pollinate flowers?
A. They want to get to food in the flower.

B. They want to make seeds.

C. They want to help the flowers reproduce.

D. They want protection.

Answers

Explanation: B.

Bees pollinate in order to sweeten their seed

Answer:

A

Explanation:

Bees make excellent pollinators because most of their lives is spent collecting pollen which acts as a protein to feed their offspring

6.73 moles of h2o will have a mass of how many grams h2o

Answers

Answer:

121.14 g H20

Explanation:

2 (atomic weight of H2) + 16 (atomic weight of oxygen)= 18

6.73 x 18= 121.14 g

Calculate the molarity of a solution prepared by dissolving 6.87 grams of AgNO3 in enough water to make 2.50 liters of solution.

Answers

Answer:

The molarity of the solution is 0.016 [tex]\frac{moles}{L}[/tex]

Explanation:

Molar concentration is a measure of the concentration of a solute in a solution.

Molarity (M) or Molar Concentration is the number of moles of solute that are dissolved in a certain volume.

Molarity is determined by dividing the moles of the solute by the volume of the solution:

[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

Being 169.87 g / mole the molar mass of AgNO₃, then you can apply the following rule of three: if 169.87 grams are contained in 1 mole, 6.87 grams are contained in how many moles?

[tex]amount of moles=\frac{6.87 grams*1 mole}{169.87 grams}[/tex]

amount of moles= 0.04 moles

Then:

number of moles of solute: 0.04 molesvolume: 2.50 L

Replacing:

[tex]Molarity=\frac{0.04 moles}{2.50 L}[/tex]

Solving:

Molarity= 0.016 [tex]\frac{moles}{L}[/tex]

The molarity of the solution is 0.016 [tex]\frac{moles}{L}[/tex]

The molarity of a solution that contains 28 g KOH (molar mass 56 g/mol) per 250 mL of solution is:

Answers

Molarity = moles of solute/volume of solution in liters

The solute here is KOH. We have the mass of KOH, and we can calculate the number of moles by dividing by the molar mass: (28 g KOH)/(56 g/mol) = 0.5 mol KOH. The volume of our solution is 0.250 L.

So, the molarity of the solution would be (0.5 mol KOH)/(0.250 L) = 2 mol/L KOH or 2 M KOH.

When
Mercury
orbits
the
Sun,
it
gets
as
close
as
4.8
x
107
miles
to
the
Earth.

It
gets
as
far
as
1.38
x
108
miles
to
the
Earth.

What
is
the
difference
of
these
two distances

Answers

Answer:

hdkdjfjhdakdhevghggggfdffggggfggcdhxgjcfogogi

Can rotation and revolution occur at the same time? Explain.

Answers

Answer:

yes

Explanation:

Revolution is the movement of an object around another object. So, Earth revolves around the Sun, and the Moon revolves around Earth. At the same time, Earth and the Moon are also rotating. Earth's rate of revolution is about 365 days (one year), and its rate of rotation is about 24 hours (one day).

PLEASE HELP ME WITH PHYSICAL SCIENCE!! PRETTY EASY QUESTION ​

Answers

Explanation:

Bbbbbbbbbbbbbbbbbbbbb

Answer:

B.

Explanation:

the substance would still be pure because both of the atoms are natural

it wouldnt create something pure or new it would just combine

so it would be B

hope this helps!

~goldfishareswag/brianna

:)

Cualquier liquido a 25°C de temperatura y al nivel del mar a) adquiere una forma y volumen definido b) posee la forma del recipiente que lo contiene y ocupa un volumen constante c) no tiene forma ni volumen definidos d) tiene estructura cristalina

Answers

Answer:

b) posee la forma del recipiente que lo contiene y ocupa un volumen constante

Explanation:

Hay tres estados de la materia;

Sólido

Líquido

Gas

En estado líquido, la materia no tiene forma ni volumen definidos. Esto implica que la materia adquiere la forma del recipiente en el que se encuentra.

El líquido tiene un volumen definido. No ocupa el volumen del envase.

More about this source textSource text required for additional translation information

a- Write the name of the process when the electron falls to a lower energy level and a photon is emitted

Answers

Answer:

emission

Explanation:

when atoms return to lower energy levels they emit photons, in a process called emission

Helppppppppppppppppppppppppppppppppppppp

Answers

Answer:

0.67moles

Explanation:

The balanced equation of the chemical reaction given in this question is:

N2 + 3H2 → 2NH3

According to this equation, 3 moles of hydrogen gas (H2) produces 2 moles of ammonia gas (NH3)

Therefore, 1 mole of hydrogen gas (H2) will produce;

= 1 × 2/3

= 2/3

= 0.6666

= 0.67moles of ammonia (NH3)

How are bird bones adapted for flight?
1. They are thin.
2. They are hollow.
3. They are strong.
4. Birds do not have many bones.

Answers

The answers will be number 4. Birds do not have many bones

Answer:

2. They are hollow.

Explanation:

goo  gle says

PLSSS ANSWERRRRR????

Answers

the app socratic will help you to get the answer

Which change of phase is most likely occurring in the beaker

Answers

Answer:

Evaporation

Explanation:

Heat makes molecules move and eventually evaporate.

3. how many moles are present in 10.0 g of aluminum(Al)​

Answers

Answer:

1 Mole

here is answer

hope it will help you

Lab: Limiting Reactant and Percent Yield
Student Guide
Pre-Lab Information
Purpose Explore the yield of a chemical reaction by identifying the limiting reactant, comparing the
theoretical and actual yields, and explaining the sources of error.
Time Approximately 45 minutes
Question While observing a chemical reaction, how can you tell which reactant is limiting?
Reaction The reaction of copper(II) chloride and aluminum is shown in this balanced equation:
3CuCl2 + 2Al  2AlCl3 + 3Cu
Hypothesis If a substance is the limiting reactant, then it will be fully consumed by the time the
reaction completes because it is the reactant that reacts completely and the reaction
cannot proceed further.
Summary You will react copper(II) chloride with different quantities of aluminum in two trials. You
will also calculate percent yield for Trial 2.

Answers

Answer:

pre lab information would be the thing you to ressearch the lab to get the information

Limiting Reactant and Percent Yield Lab Report attached

Select the correct answer.
John is riding a ski lift to the top of Wildcat Mountain. He removes his gloves and rapidly rubs his hands together to warm them up. What
happens when John rubs his hands?
O A. The skin on his hands rapidly conducts heat, similar to metal.
O B. He traps heat between his hands because skin is an insulator. IS
O C. The particles In his hands vibrate faster because of friction.
O D. Thermal energy moves from his fingertips to his palms.
O E. He simulates a fever that'll raise his core body temperature.

Answers

Answer:

Fairly certain it's C. The particles In his hands vibrate faster because of friction :)

Answer:

C

Explanation:

Thermal energy is measurement of what type of molecular energy? *

Answers

Answer:

Kinetic energy!

Explanation:

It measures the average kinetic energy of the molecules of a substance in degrees Fahrenheit (F) or Celsius (C).

Have a good day!!

Other Questions
Kathleen likes to make desserts for bake sales. Last month, she made 1 batch of browniesand 1 batch of cookies, which called for 7 eggs total. The month before, she baked 1 batch ofbrownies and 2 batches of cookies, which required a total of 11 eggs. How many eggs didKathleen use for a batch of each dessert?eggs to make a batch of brownies andKathleen usesof cookies.Submiteggs to make a batchYou hJay The relative age of a rock gives scientists a numerical date that the rock was formed.a. Trueb. False Research the short-term and long-term risks in global diamond supply chains and write a short document (maximum 3 pages) that outlines what these risks are and how they are mitigated by major diamond producing corporations. 40 POINTSUse the image to determine the type of transformation shown.Image of polygon ABCD and a second polygon A prime B prime C prime D prime to the right. Horizontal translation Vertical translation Reflection across the y-axis 270 counterclockwise rotation True or False: Separating your tasks into components-such as characters, setting, and plot-and then listing ideas for one category at a time is a great way to generate new ideas for a story if you have writer's block.A. FalseB. True Fireflies make their light. The light they give off looks green. The spectrum of their light is shown. Describe how you would use a tool to see a fireflys light spectrum. Explain what the spectrum tells you about the light the firefly gives off. Include a comparison of the wavelengths of the light. What is the significance of Equiano's book? when trying to determine client satisfaction with internet based CBT, it is important to measure the patients How has physical activity changed over the years? can some one please help me with this question What are the 3 reasons for deductibles? Celebrities with separation anxiety?? Write the semantics of the execution of a local statement that introduces multiple variables simultaneously. For example, the following Oz programlocal P inlocal Y inlocal Z inZ=1proc {P X} Y=X end{P Z}endendendcan be transformed into an equivalent program for which all the declarations have been done altogether:local P Y Z inZ=1proc {P X} Y=X end{P Z}endThis assignment extends the kernel language by a declaration statement that introduces multiple different variables simultaneously. The statement under consideration is thuslocal 1 ... n in endGive an operational semantics rule where the statement to be pushed is . Succession occurs after ecosystems experience some type of disruptive event.truefalse What is the relationship between risk and return a higher risk often means a higher return? What should you not drink with pewter? Consider a light, single-engine, propeller-driven, private airplane, approximately modeled after the Cessna T-41A. The characteristics of the airplane are as follows: wingspan = 35.8 ft, wing area = 174 ft2, normal gross weight = 2950 lb, fuel capacity = 65 gal of aviation gasoline, the parasite drag coefficient CD,0 = 0.025, Oswald efficiency factor = 0.8 and propeller efficiency = 0.8. The power plant comprises one-piston engine of 230 hp at sea level. Calculate the maximum velocity of the airplane at sea level. (Round the final answer to one decimal place.) determine the 97.5th percentile of the standard normal distribution as a decimal rounded to the nearest hundredth. Leslie wants to invest $3,800.00 in a savings account that pays 4.8% simple interest.How many years will it take for this investment to triple in value? Round your answer to the nearest tenth of a year.It will take _______ years for this investment to triple in value. pls help me and explain how to do this TwT