Fill out the following regarding the element

Atomic Number
Atomic Mass
Number of Protons
Number of Electrons
Number of Neutrons

Fill Out The Following Regarding The Element Atomic NumberAtomic MassNumber Of ProtonsNumber Of ElectronsNumber

Answers

Answer 1

Answer:

1 is 84

2 is 218

3 is 84

4 is 84

5 is 134


Related Questions

Why does 50 g of copper require less heat (q) than 50 g of water, in order to raise the temperature by 15 oC? (Hint - the heat capacity may play a role, but how?)

Answers

Answer:

See Explanation

Explanation:

Specific heat capacity is an intensive physical property of matter. It is a measure of the quantity of heat that must be supplied in order to change the temperature of a unit mass of a substance by 1°C.

The specific heat capacity of a substance determines the quantity of heat that must be supplied in order to effect a temperature change of a unit mass of a substance. The higher the specific heat capacity of a substance, the greater the quantity of heat required to effect a temperature change in a given mass of the substance.

The specific heat capacity of water is 4,200 Joules per kilogram while the specific heat capacity of copper is 385 Joules per kilogram. Hence, the heat capacity of water is far greater than that of copper and consequently, 50 g of copper require less heat (q) than 50 g of water, in order to raise the temperature by 15 oC.

What is the relative humidity of the air when the dry-bulb temperature is 4°C and the dewpoint is -4°C?
1.
42%
2.
46%
3
51%
4
56%

Answers

Answer:56%

Explanation:

In the dewpoint chart when you line it up it ends up at 56%

The relative humidity of the air when the dry temperature is about 4 degrees and the dew point is about -4 degrees C is 56%. Hence option  4 is correct.

What is dewpoint?

The dew point is the temperature at which the air needs to be colled at a ta constant pressure in order to have an RH of 100%. The dew point is minus four degrees and the RH of the air is 4 degrees.

For the forces to initiate the air must get cooler and a constant addition of water pressure should be there. Thus substrating the temperature of the wet bulb, putting the thermometer on the dry bulb, and making use of the RH chart tells us that RH is 56%

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PLEASE HELP! (8.01 MC)

What is capillary action? Describe how capillary action shown by water is useful for
plants and animals on Earth. (8 points)

Answers

Capillary action help the root of plant to absorb water from the soil and help animals to bring water.

What is capillary action?

Capillary action is the process by which water flow and passed through a narrow space without the help of an opposition or any form of external forces like gravity.

Therefore, Capillary action help the root of plant to absorb water from the soil and help animals to bring water.

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How many moles of KI are present in 0.85L of a 0.55 M KI solution?

Answers

Answer: Amount of moles is 0.47 mol

Explanation: Amount of moles n = cV = 0.55 M · 0.85 l = 0.4675 mol

There are 0.4675 moles of KI in 0.85L of a 0.55 M KI solution

WHAT IS MOLARITY?

Molarity is a measure of the concentration of a solution. It is calculated by dividing the number of moles (n) of a solute by the volume of a solution (V)

Molarity = number of moles (n) ÷ volume (V)

According to this question, the molarity of a KI solution with a volume of 0.85L is 0.55 M. Hence, the number of moles of KI in the solution can be calculated as follows:

Molarity = n/V

0.55 = n/0.85

n = 0.55 × 0.85

n = 0.4675 moles

Therefore, there are 0.4675 moles of KI in 0.85L of a 0.55 M KI solution.

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Use the drop-down menus to answer the questions about fronts and weather maps.
Cold fronts appear on weather maps in areas of .
Warm fronts appear on weather maps in areas of .

Answers

Answer:

Large temperature and air pressure decrease.

Temperature and air pressure increase.

Explanation:

The correct options about fonts and weather maps are:

Cold fronts appear on weather maps in areas of Large temperature and air pressure decrease.

Warm fronts appear on weather maps in areas of Temperature and air pressure increase.

What is a cold front and warm front?

Similar to a cold front, there is usually a noticeable temperature change from one side of the warm front to the other.

A cold front occurs when colder air replaces warmer air, while a warm front occurs when warmer air replaces cold air.

Thus, the correct options are:

Cold fronts appear on weather maps in areas of Large temperature and air pressure decrease.

Warm fronts appear on weather maps in areas of Temperature and air pressure increase.

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How many molecules are there in 3 moles of aluminum chloride ?

Answers

there are 4 atoms in aluminum chloride

Convert 7.8 moles of carbon tetrafluoride into grams.

Answers

Answer:

686.43363984 is the answer when 7.8 moles is converted.

Diamond is the hardest mineral according to Mohs Hardness Scale having a hardness scale reading of 1. True or false ? if you get it right ill make u brainliest also ill give all points ! ​

Answers

I believe it to be true. Diamonds are the hardest minerals. Being able to cut through any gem.

explain why hydrogen chloride does not conduct electricity, but a solution of hydrogen chloride and water conduct electricity

Answers

The answer is… Ions are highly charged species that can readily conduct an electrical current. But hydrogen chloride the gas does not exist as ions since there is no solvent medium for them to dissolve into. Hope this helps!

Calculate how many grams of methane (CH4) are in a sealed 800. mL flask at room temperature (22 °C) and 780. mm of pressure. Show work pls.

Answers

"0.0340" mol of CH₄ are in sealed flask.

Methane (CH₄)

Methane would also be a greenhouse gas, therefore its existence tends to affect humanity's surface temp as well as weather patterns framework; it is released into the atmosphere from such a wide assortment of life forms as well as biogenic.

According to the question,

Volume, V = 800 mL or, 0.800 L

Temperature, T = 22°C or, 295

Pressure, P = [tex]\frac{780}{760}[/tex] = 1.03 atm

As we know the relation,

The gram of moles will be will be:

→ n = [tex]\frac{PV}{RT}[/tex]

By substituting the values, we get

     = [tex]\frac{1.03\times 0.800}{0.08206\times 295}[/tex]

     = [tex]\frac{0.824}{242.077}[/tex]

     = 0.0340

Thus the response above is correct.

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In calorimetry, energy is measured through heat transfer from one substance to
another. Which of the following is NOT a method of heat transfer?

Answers

I think you forgot to add a picture?

Answer:

Refraction

Explanation:

A solution has a concentration of 4.55x10^-2 H+ ions what is the pH

Answers

Answer:

1.34

Explanation:

PH can be calculated by taking the negative logarithm to the base ten of the hydrogen ion concentration

which ecosystem is the least stable

Answers

Answer:

cornfield

Explanation:

Which of the following forces is the weakest?
Hydrogen Bonding
Ionic Bonds
Covalent Bonds
London-Dispersion Forces
Dipole-Dipole Interactions

Answers

ionic bonds i think

The equivalence point of a titration corresponds to which of the following?
O the point where equal volumes of acid and base have been used
O Equivalence point is another term for end point
All of the listed options are true
Equivalence point is defined as the point where the pH indicator changes color
O the point where the acid and base have been added in proper stoichiometric amounts

Answers

Answer:

E: the point where the acid and base have been added in proper stoichiometric amounts

Explanation:

Equivalence point in titration is simply the point where the amounts of acid and base used just sufficiently reacts chemically to cause neutralization whereas the endpoint is the point where the indicator of the titration changes colour.

The Equivalence point occurs before the endpoint.

Thus, option E is correct.

Explain the term orbital.​

Answers

Answer: a mathematical expression describing the probability of finding an electron at various locations; usually represented by the region of space around the nucleus where there is a high probability of finding an electron

Explanation:

A student is given the following information about an unknown solution:
● Dissociates 100%
● Feels slippery to the touch
● pH 13.5

Answers

I think it’s ph 13.5 which indicates the acidity or Base of an object such as an apple

A student is given the information like dissociates 100%, slippery in touch and have pH 13.5 about an unknown solution so the unknown solution is a strong base.

What pH value tells about?

pH value of any solution tells about the acidity or basicity of the solution, according to the pH scale.

pH ranges from 0 to 14, acidic solutions have the pH range from 0 to 7, neutral solutions have pH 7 and basic solution have pH range from 7 to 14. In the question given that pH of the unknown solution is 13.5 which means that given solution is basic in nature. Also given that solution shows 100% dissociation, it means basic solution is strong as it shows full dissociation and slippery behavior is the physical property of bases.

Hence option (2) is correct i.e. Strong base.

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Hey guys I really need help here, please answer this! I'd be most grateful :)

3. Besides the major types of radioactive decay, there are two others: positron emission and electron capture.
• Compare and contrast positrons with electrons.
• Explain how positron emission works and how it causes transmutations.
• Explain how electron capture works and how it causes transmutations.
• Compare the transmutations caused by positron emissions and electron capture.

I've been stuck on this problem for a while and it would mean a lot, thank you again!

Answers

Answer:

See Explanation

Explanation:

Positrons are often called positive electrons. They have the same mass and magnitude of charge as the electron but are of opposite sign. This means that they are positively charged while electrons are negatively charged.

In positron emission, a proton is converted into a neutron and a positron. The anti neutrino is a particle that balances the spins.

In electron capture, an electron is converted to a neutron. The anti neutrino is a particle that balances the spins.

When transmutation occurs by positron emission, the mass number of the of the parent nucleus is the same as mass number of the daughter nucleus but the atomic number of daughter nucleus decreases by 1 while the neutron/proton ratio increases.

When transmutation occurs by electron capture, the mass number of the of the parent nucleus is the same as mass number of the daughter nucleus but the atomic number of daughter nucleus decreases by 1 while the neutron/proton ratio increases.

What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20. °C and standard pressure?

Answers

Answer:

1.14 mol

Explanation:

The concept ideal gas law can be used here to determine the volume of the balloon. The volume of the balloon is 76.97 L.

What is ideal gas law?

The combination of Boyle's law, Charles's law and Avogadro's law leads to an equation which gives the combined effect of change of temperature and pressure on the volume of a gas.

According to Boyle's law, V ∝ 1/P

According to Charles's law, V ∝ T

According to Avogadro's law, V ∝ n

On combining all these equations, the ideal gas equation is given as:

PV = nRT

P - Pressure

V - Volume

n - Number of moles

R - Universal Gas constant

T - Temperature

Here the standard pressure is 1 atm

20°C = 20 + 273 = 293 K

V = nRT / P

3.2 × 0.0821 × 293 / 1

= 76.97 L

Thus the volume of balloon is 76.97 L.

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Cu+k.HNO3 --> Cu(No3)2+..........+...........

Answers

Answer:

Cu + HNO3 → Cu(NO3)2 + H2O + NO2

Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2 (balanced equation)

Robert Hooke observed a slice of cork under a microscope. He saw what looked like “pores” or “cells” in it. Hooke can assume that the cork is most likely - Answer F A man made material G A type of living organism H A type of mineral J A petroleum based product

Answers

The cork oak tree from which cork is extracted is native to southwest europe and northwest africa. Cork is extracted from cork oak trees without harming the tree. So cork is a type of mineral. The correct option is C.

What is a cork cell?

The dead cells without having intercellular spaces are defined as the cork cells. They appear at the periphery of roots and stems when they grow older and increase in girth. They also have a chemical called suberin in their walls.

It is the suberin which makes them impervious to gases and water. The outer protective coat of a tree is called the cork. It is one of the components of bark of the tree. The tissues of bark become old and the secondary mersitem replaces them.

Cork is made up of multiple thick layers and it protects the tree from bacterial or fungal infection.

Thus the correct option is C.

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I really need helpp

Answers

Answer:

option b

Explanation:

Determine the pH of 1.0 x 10-10M NaOH
pH=

Answers

Answer:

4

Explanation:

Applying,

pH = 14-pOH.................... Equation 1

But,

pOH = -log(OH⁻)

Where OH⁻ = Hydroxyl ion concentration of NaOH.

From the question,

Given: OH⁻ = (1×10⁻¹⁰) M

Substitute these values into equation 1

pH = 14-log((1×10⁻¹⁰)

pH = 14-10

pH = 4

Hence the pH of NaOH with a molarity of 1.0 x 10-10M = 4

True or False. And please show your work!

Answers

false I think? I could be wrong

What is the pH of a 0.235 M Ba(OH)2 solution?

Answers

Answer:

13.672

Explanation:

2 moles of OH in Ba(OH)₂

0.235 M × 2 mol OH = 0.47 M OH

pOH = -log[OH-] ; pOH = -log[0.47 M OH] ; 0.328 = pOH (consider significant figures)

14 - pOH = pH because pH + pOH = 14

14 - 0.328 = 13.672 [there are three decimal places after the OH concentration, so there should be in the answer as well - 13.672]

A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated cylinder to obtain approximately 0.6 M HCl. This solution was titrated with the original NaOH solution. The student calculated the concentration of NaOH from the experiment to be 0.099 M. In which experiment should the student be more confident of the concentration of the NaOH solution

Answers

Answer:

Following are the solution to the given question:

Explanation:

Each method through KHP is somewhat more precise since we have weighed that requisite quantity, we exactly know the KHP intensity appropriately. Its initial 6 M HCl concentration was never considered mandatory. They have probably prepared 6 M HCl solution although long ago and could have changed its concentration over even a period.



The volume of 3.73 moles of a gas is 78.3 L at a certain temperature and pressure. At the same temperature and pressure, the moles of gas
that occupies 33.3 L is

Answers

Explanation:

) If I have 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 liters, what is the temperature? P PV = nRT. 5.6 (12)=460821) T.

Give the ratio that balances out the following equation: ___Cr + ___Pb(NO3)4 ---> ___ Cr(NO3)3 + ____ Pb

Answers

the doge has the answer

Pb(NO3)4

How many ions will CaBr2 dissociate to in solution?
-cannot be determined
-3
-2
-0

Answers

Answer:

3.

Explanation:

Hello there!

In this case, according to the definition of ionic bonds, whereby the cations give away their initial valence electrons to the anions, we infer that ionic species calcium bromide has three ions, one calcium ion and two bromide ions, and therefore the answer is 3.

Regards!

Which of the following would be considered an Exothermic Reaction?*
Ice Melting
Burning wood
Boiling water
Baking a cake

Answers

Answer:

Burning wood

Explanation:

the fire releases heat into the air from the burning wood

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