what mass of gold, Au, contains the same number of atoms as 9.0 g of aluminum Al

Answers

Answer 1

Answer:

55.16 grams of gold contain same number of atoms as 7.72g AI contain


Related Questions

Name for each compoud
1.CO
2.H2SO4
3CaCO3
4 H202
5NaF

Answers

1. Carbon monoxide
2. Sulfuric acid
3. Calcium carbonate
4. Hydrogen peroxide
5. Sodium fluoride
hope this helps (:

which of the following elements would decrease in size when it became an ion

Answers

Answer:

nickel, cobalt would decrease in size when it became an iron

Using the reaction below: 2 CO2(g) + 2 H2O(l) → C2H4(g) + 3 O2(g) ΔHrxn= +1411.1 kJ What would be the heat of reaction for this reaction? 0.5 C2H4(g) + 1.5 O2(g) → CO2(g) + H2O(l) ΔHrxn= ??? KJ Question 6 options: a) Not enough information is given b) -2822.2 kJ c) +1411.1 kJ d) -705.55 kJ e) -1411.1 kJ

Answers

Answer:  d) -705.55 kJ

Explanation:

Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.

[tex]2CO_2(g)+2H_2O(l)\rightarrow C_2H_4(g)+3O_2(g)[/tex] [tex]\Delta H=+1411.1kJ[/tex]

Reversing the reaction, changes the sign of [tex]\Delta H[/tex]

[tex]C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(l)[/tex]

[tex]\Delta H=-1411.1kJ[/tex]

On multiplying the reaction by [tex]\frac{1}{2}[/tex] , enthalpy gets half:

[tex]0.5C_2H_4(g)+1.5O_2(g)\rightarrow CO_2(g)+H_2O(l)[/tex][tex]\Delta H=\frac{1}{2}\times -1411.1kJ=-705.55kJ/mol[/tex]

Thus the enthalpy change for the given reaction is -705.55kJ

does breast cancer occur in women? what are the signs and symptoms ?

actually anatomy & physiology own words pls i need it now

Answers

Answer:

Breast Cancer occurs in a lot of women.

Explanation:

The following are some symptoms of breast cancer in women.

New lump in the breast or underarm (armpit).

Thickening or swelling of part of the breast.

Irritation or dimpling of breast skin.

Redness or flaky skin in the nipple area or the breast.

Pulling in of the nipple or pain in the nipple area.

Nipple discharge other than breast milk, including blood.

Another thing is that women each year after age 40 are encouraged to get a mamogram.

Answer:

yes breast cancer can occur in both men and women.

Explanation:

some warning signs can be feeling a new lump on or around the breast or in the arm pit area, swollen or redness, also discharge from the nipple can be a sign of breast cancer. Breast pain that doesn't go away can be a sign of breast cancer.

hope this helps some. have a great night!

Explain what lattice energy is and how it affects the properties of ionic compounds. Describe the general properties of ionic compounds.

Answers

Answer:

The force of attraction between oppositely charged particles is directly proportional to the product of the charges on the two objects (q1 and q2) and inversely proportional to the square of the distance between the objects (r2).

The strength of the bond between the ions of opposite charge in an ionic compound therefore depends on the charges on the ions and the distance between the centers of the ions when they pack to form a crystal.

An estimate of the strength of the bonds in an ionic compound can be obtained by measuring the lattice energy of the compound, which is the energy given off when oppositely charged ions in the gas phase come together to form a solid.

Explanation:

The lattice energies of ionic compounds are relatively large. The lattice energy of NaCl, for example, is 787.3 kJ/mol, which is only slightly less than the energy given off when natural gas burns.

The bond between ions of opposite charge is strongest when the ions are small.

The ionic bond should also become stronger as the charge on the ions becomes larger.

Answer:

The force of attraction between oppositely charged particles is directly proportional to the product of the charges on the two objects (q1 and q2) and inversely proportional to the square of the distance between the objects (r2). The strength of the bond between the ions of the opposite charge in an ionic compound therefore depends on the charges on the ions and the distance between the centers of the ions when they pack to form a crystal. An estimate of the strength of the bonds in an ionic compound can be obtained by measuring the lattice energy of the compound, which is the energy given off when oppositely charged ions in the gas phase come together to form a solid.

Explanation:

Got it right on edge 2020

Solid substance A has a melting point of 100°C. Liquid substance B has a freezing point of 110°C. For each substance, identify its state of matter and describe the motion of its particles when the substance is at 115°C.

Answers

Answer:

both will be at liquid state. the particles will move rapidly in all directions and will collide with other particles in random motion

GIVING 5 STARS AND BRAINLY IF YOU ANSWER FIRST AND CORRECTLY
Please answer asap. Thank you.

QUESTION:

How many total elements are involved in the process of photosynthesis?

A. 2
B. 3
C. 4
D. 5

Answers

3 there are three different chemical symbols on each side of the equation

Could you do both a and b

Answers

Answer: a. atominc number= protons= 33

neutrons= mass- atominc number

80-33= 47 neutrons

b.35 protons

46 neutrons

hope this helps

When thermal energy is removed from a system, what happens to the
temperature and the average kinetic energy of the system?
Temperature decreases, average kinetic energy increases
Temperature decreases, average kinetic energy decreases
Temperature increases, average kinetic energy increases
Temperature increases, average kinetic energy decreases

Answers

Answer:

When the average kinetic energy of the molecules goes up (a rise in temperature), the average speed of the molecules increases. And lower average kinetic energy of the molecules means they have lower speed. ... When heat (energy) goes into a substance one of two things can happen

Explanation:

hope this helpss!!!

6. Now, revise your definition for waves to include energy and matter.

A wave is a phenomenon that...

Answers

Answer:

A wave is phenomenon that transfers energy from one point to another through a disturbance without affecting the matter.

Explanation:

A wave is phenomenon that transfers energy from one point to another through a disturbance without affecting the matter.

There are two main types of waves Longitudinal waves travels parallel to their source. For example, sound waves. Through a series of rarefactions and compressions, longitudinal waves are propagated. Transverse waves travel perpendicular to their source.

Your science teacher removed the gas from a birthday balloon. They discovered that the gas is made of the element helium. Inside that atom is:
A. A new substance
B. Protons, neutrons and electrons
C. A different element
D. All of the above

Answers

D is the answer I think
The answer would be “B” because a substance and element represent a structure larger than a single atom. Please mark as Brainliest answer!

You are conducting an experiment with two very reactive substances. One will react with oxygen (O) and other substances in the air, and the other will react to metal in a container. What type of environment can you seal them in so they only react with each other?

Answers

Answer:

seal them in a glass container in an atmosphere of argon (Ar) gas

Explanation:

What is the formula for an alkene containing six carbon atoms?
A. C6H10
B. C2H6
C. C6H12
D. C5H12

Answers

Answer:

C

Explanation:

Cyclohexane is a cycloalkane with the molecular formula C₆H₁₂. Cyclohexane is non-polar.

The volume of a candy bar is 55cm^3. The mass of the candy bar is 70g. What is the density of the candy bar in g/cm^3

Answers

Answer:

1.3 g/cm3

Explanation:

how did music change during medieval, renaissance and baroque eras​

Answers

Answer:

usage of trills and vibrato

Explanation:

earlier music used trills while later styles would use vibrato.

How many moles of Al are there in 20g of Al2(C2O4)3?

Answers

Gujddbjjkkoyudcvhu vguu

Question: Give the name for
the following compounds
1. MgF2
2. C2H6
3. Fe203

Answers

1. Magnesium Fluoride
2. Ethane
3. Iron (3) oxide

Why are forecasters able to make more accurate predictions about the weather when using electronic tools?
O A wide variety of devices can be used to collect weather data from many places
O Weather data come exclusively from different weather stations in one region.
Data fed into a supercomputer accounts only for select processes that occur on Earth.
Scientists must input several pieces of weather information into a computer system.

Answers

Answer:

option 1

Explanation:

Forecasters, able to make more accurate predictions about the weather when using electronic tools because a wide variety of devices can be used to collect weather data from many places. Therefore, option A is correct.

What is forecaster ?

Forecaster behavior is examined by forecasters to see how social, cultural, ethical, and environmental trends will likely impact it. They can determine what goods and services people will be wanting to purchase through this approach.

A person who informs you about the anticipated state of a situation: an analyst of the economy. a forecaster of weather. The term "meteorologist" has now become widely used to refer to someone who forecasts the weather and investigates objects that fall from the sky.

Fitzroy developed charts to allow forecasts to be made, which he called "forecasting the weather," and therefore created the word "weather forecast," after a storm in October 1859 that resulted in the loss of the Royal Charter.

Thus, option A is correct.

To learn more about forecaster, follow the link;

https://brainly.com/question/882902

#SPJ6

Which two substances are among the four major types of organic compounds made by living things?
A. Lipids
B. Carbon dioxide
C. Water
D. Nucleic acids​

Answers

Answer:

I think carbon.

Explanation:

............

i think its carbon don’t make my words

Which of the following best describes hair? O Hair is made of mostly tightly packed living cells Hair does not help control body temperature. O Hair growth occurs in the hair follicle O Hair grows at 2.5mm a month.​

Answers

Answer:

(A) Hair is made of mostly tightly packed living cells.

Explanation:

i just took the exam :) yw

a like would be nice thanks!

Answer:

A

Explanation:

Just did the exam :) Good Luck!

How does a heat affect the chemical reaction? ​

Answers

Answer:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

Explanation:

What the first one said

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. A purple center outlined in black with two concentric black circles around the center, the inner circle having 2 small green balls on it and the outer circle having 8 small green balls on it. What experimental evidence led scientists to change from the previous model to this one? A few of the positive particles aimed at a gold foil seemed to bounce back. The colors of light emitted from heated atoms had very specific energies. Experiments with water vapor showed that elements combine in specific proportions. Cathode rays were bent in the same way whenever a magnet was brought near them.

Answers

Answer:

B: The colors of light emitted from heated atoms had very specific energies.

Explanation:

dont know if its the same question i had on edg but i think its B. Sorry if i didnt understand the question :)

Answer:

b

Explanation:

helppppppppppppp plzzzzzzzz Identify each structure based on its label.

Compound A is a
amine.
Compound B is a
amine.
Compound C is a
amine.
Compound D is
.

Answers

A I hope it helps :)

Answer:

kldja

Explanation:

A.) primary

B.) tertiary

C.) secondary

D.) ammonia

edge2020

I need help again LOL.

Answers

Answer:

They require diffrent types of atoms for their makeup I belive is the answer Hope this helps

Explanation: Wow you have a lot a questions XD :D :3

Element: A substance that is made up of only one type of atom. Compound: A substance that is made up of more than one type of atom bonded together. Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.

i hope this helps

What accounts for the attractions in a chemical bond?

Answers

Answer:

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.

Explanation:

Provided is a diagram showing forces on a box.
Left
Right
40 Newtons
35 Newtons
What is the net force on the box?
SN Leht
O5N Right
75 N Let
O 75 N Right

please hurry i’m taking a test

Answers

Answer:

5 N left

Explanation:

trust me cccuuhh

Different elements have different numbers of:
Subatomic particles.
Protons.
Electrons.
All of the above.​

Answers

I think it’s all of the above

Why do most metals exist in nature as minerals rather than as pure metallic elements?

Answers

Because most metals are susceptible to oxidation, having low electronegativities, prefering to be in a cationic form vs. ... Only metals such as gold, which is resistant to oxidation, will be found pure in nature.

Which of the samples pictured is most likely a nonmetal?

A moderately shiny grey mineral.

A very shiny silvery mineral.

A crystalline yellow mineral.

A very shiny golden mineral with many small crystals.

Answers

Answer:

i think it is C

Explanation:

sorry if wrong


An element, X, has 2 isotopes, X-32 with an abundance of 31.5% and X-35 with an abundance
of 68.5%. What is the average atomic mass of element X?

Answers

Answer:

amu = 34.055 or 34.1

Explanation:

to calculate the average mass, first convert the percentages into decimals. Then, calculate the mass numbers. To get this number, multiply the decimal by the mass number for each isotope and, then add them together.

( 0.315 x 32 ) + (0.685 x 35 ) = 34.055

Other Questions
Lisez la rponse suivante. Quelle question a-t-on pose ? Choisissez toutes les questions possibles.- ____________________ ?- Je n'ai jamais vol ces sculptures.Avez-vous remarqu quelque chose de particulier au muse Avez-vous vol les sculptures cet aprs-midi ?Volez-vous souvent des sculptures ?Avec qui tes-vous venu au muse ?Quand avez-vous vol les sculptures ? The graphed line can be expressed by which equation? 1. y+2=2/3(x2)2. y-2=3/4(x-1)3. y-1=-3/4(x-2)4. y-2=3/4(x-2) Contrast is used in order to do what?make an object stand outtake a picturedemonstrate the importance of patternsmake everything in a picture look the same Compare Abraham Lincolns policy on slavery when the Civil War began in 1861 to his policy contained in the emancipation proclamation Which sentence from the poem BESTsupports the idea that a young personmay feel like he or she is too busy toenjoy life?There's taking out the trash,And unloading the dishes.Where did my planning go wrong?It's nothing but work and no fun!Somehow it doesn't seem right! The helium that fills a balloon is an example of which state of matter? (1 point) aSolid bLiquid cGas dPlasma lets goo bois bois yeet Intensive or Extensive? The shipping cost of a book(depends on weight) The number of pages in the first chapter. The number of pages in a book. Which linear equation represents a proportion relationship? A) y = x + 2B) y = 3x + 0.2C) y = -0.3xD) y = 3x + 4 Vincent is selling candy bars to raise money for his soccer team. He started with a full box of 20 candy bars and has sold 3/10 of them so far. If each candy bar costs $1.25, how much money has vincent raised? Find the slope of the line passing through the points (3,7) and (3,-5). With respect to proteins, the quaternary structure refers to the Why is it better to use the metric system, rather than the English system, in scientific measurement?A. The English system uses one unit for each category of measurement.B. The metric system uses one unit for each category of measurement.C. The English system uses consistent fractions that are multiples of 10.D. The metric system utilizes a variety of number conversions. 1. f(x) = 3x - 2 for D = (-3, 1, 5}Plzzz help plzzz help plzz help if X = 5 then 3( 2X - 4) - X What does this quote mean Words mean more than what is set down on paper. It takes the human voice to infuse them with deeper meaning.-Maya Angelou What does Direct & Inverse variation mean? What are convergent boundaries and what types of landforms do they form? Find the equation of a line passing through the point (6,9) and (0,0) Write the ordered pair for point H.1. 3, -5 2. 5, -33. -5, 34. -3, 55. -3, -5