The positively charged center of the atom consisting of protons and neutrons is called

Answers

Answer 1
It’s called the nucleus

Related Questions

A gold atom i a phere with a diameter with 272 pm and a ma with 3. 27x 10^-13 ng. Calculate the denity of one gold atom in g/cm ^3

Answers

The answer is  3.88 g/cm³ for density.

How can you figure out a sphere's density?

When you know the radius, you may use the formula volume = (4/3) π r3 to calculate the sphere's volume. Then, using the formula mass = volume density, you can calculate the mass by multiplying the volume by the density: mass = volume density. The formula mass = (4/3) π r3 density can also be used.

Given,

Radius of gold sphere is equal to 272 pm or 272 × 10 ⁻¹² m.

=  2.72 10 10 m 10²cm/m.

The diameter of an atom of gold is 2.72 × 10⁻⁸ cm,

volume of sphere = πr³

V(Au) = 4/3 · (2.72·10⁻⁸ cm)³ · 3.14.

The volume of one atom of gold is 8.43·10⁻²³ cm³

Mass of atom of sphere is equal to 3.27·10⁻¹³ ng · 10⁻⁹ g/ng

Gold atom mass is 3.27·10⁻²² g grams,

density of sphere = mass of gold atom ÷ Volume of gold atom

density of sphere = 3.27·10⁻²² g ÷ 8.43·10⁻²³ cm³

One gold atom has a density of 3.88 g/cm³

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The fact that most compounds of this chemical class with synthesized from the combination of carbon and water accounts for the derivation of the term

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Carbohydrate. The word derives from the fact that the majority of compounds in this chemical class are produced from the combination of carbon and water.

Water is a compound because it is made up of two elements: hydrogen and oxygen. Water, on the other hand, is not the same as oxygen or nitrogen. While water is a liquid, oxygen and nitrogen are gases. To be more specific, all quantitative estimates are made for glucose, the most important hexose in human metabolism. Organic compounds are those with a carbon atom backbone, whereas all other compounds are classified as inorganic. Carbohydrate. The word derives from the fact that the majority of compounds in this chemical class are produced from the combination of carbon and water.

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PLEASE HELP ASAP!!!!
ANSWERS FOR THE LAST PHOTO
W
X
Y
Z

Answers

The number of neutrons of a pottasium atom with mass number of 39 is 20. The number of neutrons in an atom of lead with mass number 207 and atomic number 82 is 125.

How to find the number of neutrons in an atom?

An atom is made up of three subatomic particles namely; protons, neutrons and electrons.

The proton is the positively charged particle in the nucleus of the atom while the electron is the negatively charged particle surrounding the nucleus.

The number of neutrons can be calculated by subtracting the atomic number of the element from the mass number.

In question 1 of the above image, no of neutrons = 39 - 19 = 20 neutronsIn question 2, no of neutrons = 207 - 82 = 125 neutrons

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Please helpppp nowww pleaseeee

Answers

Answer:

phosphorus=38.27%

hydrogen=2.47%

oxygen=59.26%

What is the percent yield if 18 grams of water are produced when 4 grams of hydrogen with excess oxygen?

Answers

To calculate the percentage yield of a reaction, you need to know the theoretical yield (the maximum amount of product that can be produced based on the stoichiometry of the reactants) and the actual yield (the amount of product that is actually produced in the reaction).

The balanced equation for the combustion of hydrogen gas (H2) with oxygen gas (O2) to form water vapour (H2O) is:

2H2 + O2 -> 2H2O

From the balanced equation, we can see that for every 2 moles of H2, 1 mole of H2O is produced. To convert 4 grams of H2 to moles, we use the molar mass of H2 which is 2.016 g/mol.

4g / 2.016 g/mol = 1.98 moles

Now we can calculate the theoretical yield of H2O. Since 2 moles of H2O are produced for every 2 moles of H2, the theoretical yield of H2O is:

1.98 moles x (2 moles H2O / 2 moles H2) = 1.98 moles

The molar mass of H2O is 18.02 g/mol, we can convert the theoretical yield of H2O from moles to grams:

1.98 moles x 18.02 g/mol = 35.7 g

To calculate the percentage yield, we divide the actual yield (18 g) by the theoretical yield (35.7 g) and multiply by 100:

(18 g / 35.7 g) x 100 = 50.5 %

Therefore, the percentage yield of the reaction is 50.5%.

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What is hydropower development?.

Answers

Answer:

Hydropower technologies generate power by using the elevation difference, created by a dam or diversion structure, of water flowing in on one side and out, far below, on the other.

What are the two types of carbohydrates and food sources?.

Answers

Answer: simple and complex.

Explanation:These are also called simple sugars. They're found in refined sugars, like the white sugar you see in a sugar bowl. If you have a lollipop, you're eating simple carbs.

How many grams are in 2. 0 moles of H2O?.

Answers

Answer:

36g

Explanation:

H2 = 2

O = 16

18 = Mr of H2O

mass = moles x Mr

mass = 2 x 18

mass = 36g

An atom is neutral. Its nucleus contains two protons and two neutrons. How many electrons does the atom have?
A. Three
B. Four
C. Two
D. Zero​

Answers

Answer:

C Two

Explanation:

no of proton = no of electron

Two electrons.
There needs to be equal number of proton (+) and electron (-) to cancel each other out in order to have no charge.

Which prediction best shows what the population could look like after many generations? What caused it to change?

Answers

Prediction 1 best shows what the population could look like after many generations. Because, the long beak traits is having more life time.

What is genetic traits ?

Each characteristics in a living thing is created by a respective genetic coding in its body. The genetic code which is responsible for a particular behavior or appearance is called a genetic trait.

Here, the prediction 1 is best . It already saying that long-beak hummingbirds are more likely to survive, that baby survived long enough to pass on its mutation, so the long-beak trait became more common over generations.

Prediction 2 says abut a  genetic trait which is less fit to survive. Hence, cannot affect the next generation population. Therefore, prediction 1 is best.

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Your question is incomplete. But your complete question probably was:

Prediction 1 :Two hummingbirds with short or medium beaks had a baby with a mutation in its genes for the long-beak trait.

Prediction 2 is best. A hummingbird could have been born with a mutation in its genes for the long-beak trait and lived for a little while.

What is the major attractive force that exists among different I2 molecules in the solid? Select one: A. covalent-ionic interactions. B. Dispersion forces. C.

Answers

The claim that sense neurons' cell bodies are located in the grey commissure, an expanded region of the dorsal root.

Dorsal nerve roots provide sensory neural signals to the central nervous system from the peripheral nervous system. Anatomically, a dorsal root ganglion develops from the dorsal root of the spinal nerves. For the central nervous system to react, they transmit sensory data from multiple peripheral receptors. It is generally recognised that DRG has a role in chronic pain. The first description of anaesthesia infiltration of the DRG was made in 1949. It has been possible to target the DRG using the dorsal root entry zone (DREZ), a nearby related neural target, dorsal rhizotomy or gangliectomy, conventional radiofrequency denervation, pulsed radiofrequency, and steroid injection.

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acid rain is the result of pollutants being released into the____

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The acid rain is the result of pollutants being released into the atmosphere.

What is acid rain ?

Nitric and sulfuric acids, which are included in acid rain and other dry, abrasive particles that fall to the ground, can harm the surfaces of sculptures, buildings, and other man-made structures. Metal is corroded by the acidic particles, which also hasten the aging of stone and paint.

What is pollutants ?

A material that is present in concentrations that could be harmful to creatures (including people, animals, and plants) or go beyond the limits of acceptable environmental quality is referred to as a pollutant. Frequently, the words "term" and "contaminant" are used interchangeably.

Therefore, acid rain is the result of pollutants being released into the atmosphere.

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Are CO2 and SO2 polar or nonpolar?.

Answers

Answer:

Polar and nonpolar

Explanation:

CO2 is a nonpolar molecule meaning it has equal sharing of electrons

SO2 is a polar molecule meaning that the oxygen pulls slightly more giving it a more bent shape as it has a more negative and a more postive side

What is the kinetic energy a car with a mass of 1500kg running with a velocity of 20m s to the east?.

Answers

The kinetic energy of a car with a mass of 1500 kg running at a velocity of 20 m/s to the east is  60000J (Joules).

The kinetic energy of an object is the energy it possesses due to its motion. It is calculated by using the formula KE = 0.5 * m * v^2, where m is the mass of the object in kilograms and v is its velocity in meters per second.

So, for a car with a mass of 1500 kg running with a velocity of 20 m/s to the east, the kinetic energy can be calculated as follows:

KE = 1/2 * 1500 kg * (20 m/s)^2

KE = 60000 J

By plugging these values into the formula, we can find that the car's kinetic energy is 60000 J (Joules). It's worth noting that kinetic energy is a scalar quantity and has no direction, so the velocity's direction (east) does not affect the calculation.

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The radius of a barium atom is 217
pm. How many barium atoms would
have to be laid side by side to span a distance of 2.60 mm?

Answers

12,005 barium atoms would have to be laid side by side to span a distance of 2.60 mm

What is  barium atoms?

Barium can be defined as a chemical element with the symbol Ba and atomic number 56.

To find the number of barium atoms that would have to be laid side by side to span a distance of 2.60 mm.

we need to divide the distance by the radius of one barium atom:

2.60 mm / 217 pm = 12,005

Therefore, 12,005 barium atoms would have to be laid side by side to span a distance of 2.60 mm.

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How many Br- ions are present in 1.00 moles of FeBr3? a. 1.81E24 b. 6.02E23 c. 6.02E25 d. 12.04E23

Answers

B) The number of Br- ions present in 1.00 moles of FeBr3 is 6.02E23.

To find the number of Br- ions present in 1.00 moles of FeBr3, we need to first determine the number of moles of Br- ions present in the compound. FeBr3 is a compound that contains 1 Br- ion per formula unit.

To find the number of moles, we can use the formula:

moles = number of atoms / Avogadro's number (6.02E23)

The number of moles of Br- ions in 1.00 moles of FeBr3 is:

1.00 moles x (1 Br- ion / 1 formula unit) = 1.00 moles

So, the number of Br- ions present in 1.00 moles of FeBr3 is 6.02E23 ions.

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what is a test variable and a outcome variable
pls help me

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The test variable is manipulated while the outcome variable is observed.

What is a variable?

When we use the term variable, our minds would have to go to something that has the ability to change. As such, when we are carrying out an experiment there is the variable that we manipulate and this would lead to a change in another variable.

The variable that we are able to manipulate as we are carrying out the experiment is what we call the test variable while the one that is changed due to this manipulation is called the out come variable.

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You have 20.0 G of sodium you want to Nixes sodium with chlorine to create the salt NaCl using percent composition determine what mass of chlorine you need to create the maximum possible amount of NaCl

Answers

The mass of chlorine needed to create the maximum amount of NaCl would be, Chlorine mass =41.56 g Cl x 33.2% = 13.7 g Cl.

How determine the mass of chlorine?To determine the mass of chlorine needed to create the maximum possible amount of NaCl, we must first look at the percent composition of sodium chloride. Sodium chloride is composed of 58.44% Na and 41.56% Cl. This means that for every 100 grams of sodium chloride, 58.44 grams is sodium and 41.56 grams is chlorine. Since we have 20.0 g of sodium, we can calculate the amount of chlorine needed to create the maximum amount of sodium chloride. First, convert 20.0 g of sodium to a percentage: 20.0 g of sodium is 33.2% of 58.44%. Then, multiply 41.56 grams of chlorine by 33.2%: 41.56 g Cl x 33.2% = 13.7 g Cl. Therefore, the maximum amount of sodium chloride that can be created from 20.0 g of sodium and 13.7 g of chlorine is 34.1 g. To create this amount of sodium chloride, we need 20.0 g of sodium and 13.7 g of chlorine.

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The mass of chlorine needed to create the maximum amount of NaCl would be, Chlorine mass =41.56 g Cl x 33.2% = 13.7 g Cl.

How determine the mass of chlorine?

To determine the mass of chlorine needed to create the maximum possible amount of NaCl, we must first look at the percent composition of sodium chloride.

Sodium chloride is composed of 58.44% Na and 41.56% Cl. This means that for every 100 grams of sodium chloride, 58.44 grams is sodium and 41.56 grams is chlorine.

Since we have 20.0 g of sodium, we can calculate the amount of chlorine needed to create the maximum amount of sodium chloride.

First, convert 20.0 g of sodium to a percentage: 20.0 g of sodium is 33.2% of 58.44%. Then, multiply 41.56 grams of chlorine by 33.2%: 41.56 g Cl x 33.2% = 13.7 g Cl.

Therefore, the maximum amount of sodium chloride that can be created from 20.0 g of sodium and 13.7 g of chlorine is 34.1 g.

To create this amount of sodium chloride, we need 20.0 g of sodium and 13.7 g of chlorine.

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What is the average speed of a bicyclist who rides 75 km in 2.5 hours? please show how you worked it out if you can bc my teacher is very specific

Answers

Answer:

30

Explanation:

I’m pretty sure it is


PRACTICE Problems
Predict whether the following single-replacement reactions will occur. If a reaction occurs,
write a balanced equation for the reaction.
21. K(s) + ZnCl₂(aq) →→→

Answers

Single-replacement reactions will occur if the reaction below occurs

K(s) + ZnCl₂(aq) →→→ KCl₂ + Zn.

What is Single-replacement reaction?

This is also referred to as single displacement reaction and it is referred to as a reaction in which one element is substituted for another element in a chemical reaction.

Single-replacement reactions will occur in the reaction below because it follows and obeys this condition which is:

A + BX ⇒  B + AX

K(s) + ZnCl₂(aq) →→→ KCl₂ + Zn.

Here we can deduce that zinc was substituted which is therefore the reason why it was chosen as the correct choice in this scenario.

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In the activity series, the more active elements are found
(a) at the bottom
(b) in the middle
(c) at the top
(d) both (a) and (c)

Answers

In the activity series, the more active elements are found at the bottom and at the top. Option d.

The activity series is a way of organizing elements according to their reactivity.

The elements found at the bottom of the series are the most active, and those found at the top are the least active.

Knowing the activity series can help us predict how a reaction will proceed, and can be a useful tool when determining which compounds are most likely to form in a given reaction.

The elements at the bottom of the activity series are the most active, and the elements at the top are the least active. Knowing the activity of elements can help you understand the chemical properties of different materials and how they may interact with each other.

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Rank these compounds by their expected solubility in hexane, C_6H_14.

Answers

Based on its solubility in hexane, C₆H₁₄. Then the order of these compounds is C₃H₈ → CH₃OH → H₂O

Non-polar compounds are compounds that are formed due to the existence of a bond between electrons in the elements that form them. This happens because the bonding elements have the same or nearly the same electronegativity value.

Polar compounds have a high dipole moment, while nonpolar compounds do not have a dipole moment. This difference causes the two solutions to not bond.

Hexane is non-polar.

So, C₃H₈ is the easiest to dissolve because C₃H₈ is also non-polar.

H₂O is more polar than CH₃OH. So, CH₃OH will dissolve more easily than air. air will at least dissolve.

So that the order based on its solubility with hexane is C₃H₈, CH3OH, H₂O.

Your question may incomplete, for complete questions it's in the picture.

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Rearrange the work equation and show the equation for force.
Work equation: W=Fxd

Answers

Answer:

Force=Work done÷ distance travelled

Explanation:

To do this, you want to make the Force variable on its own so you divide d on both sides to get F=W/d

Hope this helps.

Given g(x) = f(x) + k, enter the value for k that transforms the function f into g?.

Answers

The value for k that transforms the function f into g is -3.

What is the meaning of value for k?

Value for k is a term used in mathematics to refer to the number of elements in a set. The value of k depends on the context of the problem. It could be any numerical value, depending on what it is being used for.

Given : g(x) = f(x) + k

Taking two points from the graph (1,0) and (-1, 2)

slope =   [tex]\frac{2-0}{-1-1}[/tex] =  [tex]\frac{2}{-2}[/tex] = -1

The equation will be,

                       y-0 = -1 (x-4)

                          y= -x + 4

                        f(x)= -x + 4

  So,                g(x)= f(x) + k

                    -x + 1= -x + 4 + k

                          k= 1+4

                          k= -3

Therefore, the value for k= -3.

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In area of higher core, what help you maintain healthy behavior? Conider your peronal knowledge about what it mean to be healthy and your attitude and belief. Then conider the other level of the ocioecological model—conider how you are upported by friend and family, your chool community and living ituation, intitution to which you belong, and local or national policie

Answers

A healthy behavior can be maintained by maintaining healthy relationships with supportive friends and family, keeping good hygiene, having enough sleep, exercising etc.

Maintaining a healthy behavior is very important not just for our emotional and mental health but also for our overall physical as well as social well being too. Our behavior reflects our attitude as well as our beliefs.

A healthy behavior can be maintained by healthy social interaction amongst our peers, supportive friends, family and also in the community as well as institution which we are a part of. One can also maintain healthy behavior by adopting healthy habits like exercising, sleeping on time, keeping good hygiene etc.

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which elements are most likely to react in the same manner in a chemical reaction?

Answers

The elements most likely to react in the same manner in a chemical reaction are those that are in the same group. It because of the same number of valence electrons.

The elements in the same group are most likely to react in the same manner in a chemical reaction. It is because their outer shells have the same number of valence electrons. In fact, the electrons are the component of an atom that is involved in reactions. Meanwhile, the protons and neutrons in an atom's nucleus are not involved in reactions.

For example:

Elements in the Group 1 (Alkali metals) contains Li, Na, K, Rb, Cs, and Fr.

- They all have one valence electron, which they easily lose when forming ions.

- They are easily reacted with water

- They possess low melting points and densities

- They are good electrical conductors.

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when hydrogen bonds form between water molecules, water____

Answers

When hydrogen bonds develop between the molecules, the boiling point of water rises. Hydrogen bonds are created when the electronegative oxygen atoms of two different water molecules combine.

Has a hydrogen atom that it can attach to in a separate water molecule. The molecules are hence strongly attracted to one another. In order to make a hydrogen bond, two atoms from either the same or a distinct molecule are required. Hydrogen bonds can form in two different ways: Between-molecule H-bonding molecules form hydrogen bonds. Hydrogen bonding is possible when the hydrogen atom in a molecule is attached to a strongly electronegative atom. One hydrogen atom in water is wedged between two oxygen atoms, creating a solid bond with the following water molecule.

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Margarita decides to enter her school's science fair. She has always loved flowers and wants to incorporate them into her
project. In the end, Margarita decides to test the effectiveness of different types of plant food (fertilizer) on a certain type of
rose bush. Her goal is to determine which fertilizer produces the tallest rose bushes with the greatest number of flowers.
Describe how Margarita might set up her experiment. Discuss the actions Margarita should take to get reliable data.

Answers

Answer: Statistics is the best way for Margarita to organize, interpret, and present her data.

Explanation:

Nitrogen monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). Write a balanced equation for this reaction. The reaction is experimentally found to be (approximately) first-order in H
2
and second-order in NO. Write down the form of the experimentally-determined rate law and the units of the rate constant.

Answers

We must now strike a balance. This portion is all guesswork, but look at nitrogen on the right; there are two of them, so we put a "2" next to nitrogen monoxide.

We then count to check whether everything is balanced, and we'll notice that there are now two oxygens on the left and only one on the right, so we'll put a "2" next to the water. Count again, and lastly, a "2" next to the hydrogens will give us a balanced equation of:nitrogen monoxide.  Now there are rate laws. If your reaction was A+B—>C+D. The rate law is equal to some empirically established constant "k" times the concentration of the reactants increased to some value. power (also empirically determined) (also experimentally determined). So the general form is as follows: Alpha and Beta are just the order of the reactants. Because the question specifies the sequence of each reactant, your rate law should look like this.

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If the molecular mass of the salt is 136 g/mol, how many moles of anhydrate are there?

Answers

if the mass of the sample is 272 grams, the number of moles of anhydrate present would be:

moles = 2

What are moles?

Generally, To determine the number of moles of anhydrate present, you would need to know the mass of the sample. If you have that information, you can use the formula:

moles = mass / molar mass

Where

mass is the mass of the sample in grams and

molar mass is the molar mass of the salt (in this case, 136 g/mol).

For example, if the mass of the sample is 272 grams, the number of moles of anhydrate present would be:

moles = 272 / 136

= 2

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Reread this poem by Peace Corps volunteer Christopher Knapp.SacredYou took my hand one time only:at our parting, which surprised you.After thousands of words and hundreds of mealshad passed, you put my hand in yours, one time.Your hand was sandpaper, callused and rough,fingers fixed to curl around a plow,nails caked with dirt from morning prayers.It felt like home against mine.You took my hand one time only,before I caught the bus to leave Kornaka.You took my hand and said "my son,remember the telephoneis sacred."Analyze this poem's use of line breaks. (Which line breaks are most important, and what is their effect on readers?) What are the 3 symbols in the gift of the Magi?. What is the mood of Ode on a Grecian Urn?. Who among the following have written the book The Social Contract Mcq?. how does glucagon cause the blood glucose level to decrease Find the least common denominator of 1/2x-6 and 2x/7x-21. Cameron determined that an ordered pair made a true statement when substituted into one of the equations but not in the other equation. Is her ordered pair a solution to the system of equations? If not, explain. Wich branch of the U.S. Government includes congress, which is composed of the House of Representatives and the senate? A- legislative branch B- judicial branch C-executive branch What is partial sum limit?. In what ways is Sam Houston clever? imagine that a friend wants to start a new business and has asked you what it takes to succeed as an entrepreneur. based on the guidance provided by the small business association, you would explain that successful entrepreneurs possess which of the following characteristics and skills? check all that apply. they are supported by mentors. they are creative thinkers. they are decisive decision makers. they are risk averse. a very large corporate farm in the united sates is most likely to take advantage of which of the following opportunities? How do you write eight more than a number?. the state levies a 4 percent sales tax on merchant sales volume while the local government levies a 2 percent sales tax on the same activity. merchants are required to remit the full amount of all levied taxes to the state government within 15 days of month-end and the state is required to remit collected taxes to local authorities within 30 days of receipt. assume the state and local authorities had june 30 year-ends, and that sales volume for the months of june and july was $100,000 and $200,000, respectively. at june 30, each government would accrue the following related to sales activity: How do you solve y =- 2x 6?. Somebodyy pls help me with this!!! if you answer you get 41 points pls help!!! Who are the 6 Romantic poets?. Why is it so hard to get off welfare?? is the consitution working What type of analysis the concept of opportunity cost can be applied to?.