How many atoms of gold are there in 5 moles of a gold sample ?

Answer:

HERE

Explanation:Therefore, there will be

6.022

×

10

23

oxygen atoms in

1

mole, or

18 g

of water.

The upward drag and downward force is equal for the skydiver when he jumps down from the plane. Thus, he experiences a constant speed through out his motion.

Gravitational force is a kind of force by which a body attracts other objects into its center of mass. Force exerted by the body depends on the mass and distance to it.

Earth pull every objects into its surface by gravitational fore of attraction. For moving body the the gravitational force acting downward have an acceleration due to gravity.

The skydiver experiences a force upward by the drag of a the parachute. When this force becomes equal to the downward fore of gravity, then his speed will be constant thus, no gain or lose for speed.

To find more on gravitational force, refer here:

https://brainly.com/question/12528243

#SPJ2

Answer:

A. write balanced chemical equation (including states), for this process.

Explanation:

Almost all hydrocarbon 'burn' reactions involve oxygen; it's by far the most reactive substance in air.  

Hydrocarbon combustions always involve  

[some hydrocarbon] + oxygen --> carbon dioxide + steam.  

C6H6(l) + O2 (g)--> CO2 (g)+ H2O (g)

Balance carbon, six on each side:  

C6H6(l) + O2 (g)--> 6CO2 (g)+ H2O (g)

Balance hydrogen, six on each side:  

C6H6(l) + O2 (g)--> 6CO2(g) + 3H2O (g)

Now, we have fifteen oxygens on the right and O2 on the left.  

Two ways to deal with that. We can use a fraction:  

C6H6 (l)+ (15/2)O2 (g)--> 6CO2 (g)+ 3H2O (g)

Or, if you prefer to have whole number coefficients, double everything  

to get rid of the fraction:  

2C6H6 (l)+ 15O2 (g)--> 12CO2 (g)+ 6H2O (g)

With the SATP states thrown in...  

C6H6(l) + (15/2)O2(g) --> 6CO2(g) + 3H2O(g)

Answer:

Question 4 is 291.0346

Explanation:

Answer:

calcium oxide

Explanation:

its stable

There are several metals which can be used to reduce the metal oxides to corresponding metals. Carbon is an efficient reducing agent. Here Calcium oxide cannot be reduced to calcium by carbon. The correct option is C.

The reaction of metals with oxygen result in the formation of oxygen containing compounds called metal oxides. The binary compounds of oxygen with lesser electronegative elements are called oxides. Most of the stable oxides have 'O' in its -2 oxidation state. Na₂O, CO₂, etc. are some oxides.

Carbon is a reducing agent and it is present above the elements like 'Zn', 'Cu', 'Fe', 'Ag', etc. in the electrochemical series. But the oxides of highly reactive metals cannot be reduced with carbon. Because these metals have more affinity for oxygen than carbon.

The highly reactive metals are extracted by using the electrolytic reduction of their molten chloride. It is not possible for carbon to reduce the oxides of metals like 'Na', 'Ca', 'Al', etc.

Thus the correct option is C.

To know more about oxides, visit;

https://brainly.com/question/13059271

#SPJ6

Answer: CH2O I just did the question

Explanation:

Empirical formula is the simplest whole number ration of elements in a compound. Molecular formula is n times where n is integers 1,2,... Therefore, the empirical formula that is 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen is CH[tex]_2[/tex]O.

Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.

Number of gram atoms in compound = percentage of that element ÷Molar mass of that element

Molar mass of carbon=12

Molar mass of hydrogen =1

molar mass of oxygen=16

C= 40.00%÷24=1.66

H= 6.71%÷1=6.71

O=53.29%÷/16=3.33

The atomic ratio is1.66:6.71:3.33. Dividing by smallest whole number, the Whole number ratio is C:H:O is 1:2:1. Empirical formula corresponding to this whole number is CH[tex]_2[/tex]O.

Therefore, the empirical formula that is 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen is CH[tex]_2[/tex]O.

To know more about empirical formula, here:

https://brainly.com/question/14044066

#SPJ2

Answer:

chemical structure determines the molecular geometry of ca compound by prtraying the arrangement of atoms and chemical bonds in the molecule..

Explanation:

hope this helps any <3

Answer: Well take this for an example and see if it helps with 50 grams of sucrose

Explanation:

Explanation:

And we have to calculate the number of moles of sucrose present in a  

lb

mass of sucrose:

Moles of sucrose

=

454

⋅

g

342.30

⋅

g

⋅

m

o

l

−

1

=

1.33

⋅

m

o

l

.

Now it is a fact that in a  

mole

of stuff there are  

6.022

×

10

23

individual items of stuff.........

So  

1.33

⋅

m

o

l

×

6.022

×

10

23

⋅

m

o

l

−

1

≅

8

×

10

23

individual

sucrose molecules

Answer:

Mold fossil

Explanation:

It's called a mold fossil because they are formed when sediments bury an organism and then the sediments are changed into rock; then the organism decays thereby leaving a cavity in the shape of the organism

The properties most likely belong to a metal are ductile and malleable.

Malleability - Those metals that can be beaten into thin sheets with a hammer or any heavy object. For example - Cu, Au etc

Ductility- The property of the metals which can lead the metals to form them into wires.

Conductivity - Conductivity is the measure of the ease at which an electric charge or heat can pass through a material. For example - Metals are good conductors of heat and electrolytic solution is conductors of electricity.

Metals have many other properties including the given above, like sonority,  lustrous surface, very hard etc.

Therefore, The properties most likely belong to a metal are ductile and malleable.

Learn more about Metals here:

https://brainly.com/question/28650063

#SPJ2

Answer:c

Explanation:

Answer: has a -1 charge

is an electron

is emitted from the nucleus

Explanation:

The beta particle is basically an electron with -1 charge and no mass.

Beta particles are  fast-moving electron emitted by radioactive decay of substances. Beta particles have a charge of - 1, and a mass of about [tex]\frac{1}{2000}[/tex] th of a proton. This means that beta particles are the same as an electron.

A beta particle, also called beta ray or beta radiation [tex](\beta)[/tex], is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.

A beta particle is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide.

Answer:

170.4L

Explanation:

The reaction equation is given as:

        N₂  +   3H₂  →    2NH₃  

Mass of NH₃    =  35.5g

Problem:

How many liters of H₂ are needed to produce 35.5g of NH₃  

Solution:

To solve this problem, let us find the number of moles of NH₃;

           Number of moles  = [tex]\frac{mass}{molar mass}[/tex]

Molar mass of NH₃   = 14 + 3(1)  = 17g/mol

 So;

            Number of moles  = [tex]\frac{35.5}{17}[/tex]  = 5.07mole

From the balanced reaction equation:

               2 mole of NH₃   will be produced from 3 mole of H₂  

               5.07mole of NH₃ will produce  [tex]\frac{5.07 x 3}{2}[/tex]   = 7.61mole of H₂

At STP;

       1 mole of gas will occupy 22.4L

     7.61 mole of H₂ will occupy 7.61 x 22.4  = 170.4L

Answer:

x is horizontal

y is vertical

Explanation:

Answer:

it lost 900J of energy I will assume and that would mean the change in energy is -900J

Explanation:

Answer: i rlly dont know srry

Explanation:

Answer:

V₂ = 238.05 L

Explanation:

Given data:

Final volume = ?

Initial volume = 13.40 L

Initial pressure = 1.51 atm

Final pressure = 65 mmHg ( 65/760 = 0.085 atm)

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1.51 atm × 13.40 L = 0.085 atm × V₂

V₂ = 1.51 atm × 13.40 L /  0.085 atm

V₂ = 238.05 L

Answer:

9.79740949850 moles

Explanation:

Side Note: Please let me know if you need any clarifications about this!

It takes 21.3 days

Given

5 hr = 8 kg Alcohol

Required

Days to consume 1000 kg of glucose

Solution

Alcoholic fermentation⇒ glucose produces ethanol and carbon dioxide,

C₆H₁₂O₆ → 2 C₂H₅OH + 2CO₂

mol ethanol :

[tex]\tt \dfrac{5000~g}{46~g/mol}=108.7~moles[/tex]

moles of glucose to produce 108.7 moles ethanol :

[tex]\tt \dfrac{1}{2}\times 108.7=54.35[/tex]

54.35 moles = 5 hours

moles of 1000 kg of glucose :

[tex]\tt \dfrac{10^6~g}{180~g/mol}=5555.5~moles[/tex]

So for 5555.5 moles, it takes :

[tex]\tt \dfrac{5555.5}{54.35}\times 5~hours=511.085~h=21.3~days[/tex]

Answer:

Similarity: Rocks within the mantle contain more magnesium and iron than the ones in the crust.

Difference: Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly. On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.

Explanation:

Rocks within the mantle contain more magnesium and iron than the ones in the crust.

Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly.

On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.

According to geologists, a rock is a naturally occurring material made up of crystalline crystals of various minerals that have fused together to form a solid mass.

Therefore, Rocks within the mantle contain more magnesium and iron than the ones in the crust.

To learn more about rocks, refer to the link:

https://brainly.com/question/19930528

#SPJ2

Answer:

ZnO + H2SO4 = ZnSO4 + H2O | Chemical reaction and equation

Explanation:

gloogle

Answer:

B mixture can be separated by physical means

Answer:

this is compound ok or not

Answer:

It pushes back with equal force.

Explanation:

This is pretty much newton's first law.

Answer:

P = momentum

m = mass

v = velocity

Answer:

P = Momentum

M = Mass

V = Velocity

Explanation:

P = Momentum  : The quantity of motion of a moving body, measured as a product of its mass and velocity.

M = Mass  : A coherent, typically large body of matter with no definite shape.

V = Velocity : The speed of something in a given direction.

Answer:

The students should create a project in which they each look at a unique trait that each have (for example, detached ear lobes) and look at their parents to see if they too have this trait. To take it a step further, look at their grandparents for this trait, and ask them about their parents and if they have this trait, this could tell them whether the trait has always, been apparent within the family, if it skipped a generation, or the genetics of one parents were more dominant then the other.

Explanation:

Carbon-12 and carbon-14 are two isotopes of the element carbon. The difference between carbon-12 and carbon-14 is the number of neutrons in each of their atoms. Atoms of both isotopes of carbon contain 6 protons. Atoms of carbon-12 have 6 neutrons, while atoms of carbon-14 contain 8 neutrons.

Answer:

I think it's the A one. Hope it's correct

Answer:

A option is correct

Explanation:

Answer Electromagnetic waves are used to transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays.

Explanation:

Electromagnetic waves are important in society today because they are used to "transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays."