Chemistry High School

how many moles of silicon are in 5.9 X 10 to the 24 power atoms of silicon​

Answers

Answer 1

Answer:

9.79740949850 moles

Explanation:

1 mole = Avogardo's Number <<6.022 E 23 <<particles, atoms, etc.>>This problem can be solved using dimensional analysis by multiplying atoms (5.9E24 atoms) by (1) mole and then dividing the number by Avogardo's number (6.022 E 23 atoms).Note: E = * 10

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

How Many Moles Of Silicon Are In 5.9 X 10 To The 24 Power Atoms Of Silicon
Answer 2
5.9x10^24 /(6.02x10^23) = 9.80 moles of silicon
How Many Moles Of Silicon Are In 5.9 X 10 To The 24 Power Atoms Of Silicon

Related Questions

What can be concluded from the statements above?
A. A harmful compound can become harmless when its elements are separated.
B. A harmless compound can become harmful when its elements are separated.
C. Breaking a compound into its separate elements has no noticeable effects.
D.Breaking a compound into its separate elements can create carbon dioxide.

Answers

Answer:

B

Explanation:

I am not sure why

Answer:

Yea I think B as well!!!!!

how does activation energy influence a reaction

Answers

Answer: The activation energy of a particular reaction determines the rate at which it will proceed. The higher the activation energy, the slower the chemical reaction will be. The example of iron rusting illustrates an inherently slow reaction.

Explanation:

Can someone balance these equations?

Answers

This is mind numbing, but I got you.

3NaOH + 1FeCl3 = 1Fe(OH)3 + 3NaCl

3Mg + 2H3(PO)4 = 1Mg(PO4)2 + 3H2

How is elevation shown on a topographic map?
O intermediate contours
O index contours
O contour intervals
Ocontour lines

Answers

Answer:

D. Contour lines.

Explanation:

The primary difference is that they show elevation in detail. Characteristics of topographic maps include: they show elevation using contour lines. Put simply, a contour line is a line which joins points of equal elevation above sea level.

What force pulled the solar system together out of a cloud of gas and dust

Answers

gravity
Approximately 4.5 billion years ago, gravity pulled a cloud of dust and gas together to form our solar system.

Calculate the new volume if a 13.40 L of a gas at a pressure of 1.51 atm is subject to a new pressure of 65 mmHg.

Answers

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

convert 100 ml to L can you help mee??

Answers

Answer:

0.1  L

Explanation:

divide the volume value by 1000

Answer:

0.1 L that is the answer

Explanation:

I searched it

In Step 5, you will calculate H+/OH– ratios for more extreme pH solutions. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide for a solution at a pH = 2. Then divide the H+ concentration by the OH– concentration. Record these concentrations and ratio in Table C. What is the concentration of H+ ions at a pH = 2? mol/L What is the concentration of OH– ions at a pH = 2? mol/L What is the ratio of H+ ions to OH– ions at a pH = 2? : 1

Answers

Answer:0.01

0.000000000001

10,000,000,000

Explanation:

Answer:

1. What is the concentration of H+ ions at a pH = 2?

0.01 mol/L

2. What is the concentration of OH– ions at a pH = 2?

0.000000000001 mol/L  

3. What is the ratio of H+ ions to OH– ions at a pH = 2?

10,000,000,000 : 1

Have a wonderful day/night! :)

Write an informal definition of half-life.

Answers

the time required for the activity of a substance taken into the body to lose one half its initial effectiveness. Informal. a brief period during which something flourishes before dying out.

hope this helps ^^

which one of the following can be separated by physical means:
(a) element
(b) mixture
(c) compound
(d) radical

Answers

Answer:

B mixture can be separated by physical means

Answer:

this is compound ok or not

Why does forming bonds release energy? *

Answers

Bonds are stable configurations of (relative) minimal energy. So when entering a bond the combined energy level of the contributing atoms is being reduced to a local minimum. That way “free energy” is released that shows as heat or radiation (e.g.) in the environment.

What three types of particles make up an atom? What are their charges?

Answers

Answer:

Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P." Neutrons have no electrical charge.

Answer:

Protons, positive charge

Neutrons, neutral

Electrons, negative charge

Explanation:

HELPPP simply the expression!!!!

Answers

Answer:

[tex] \frac{3}{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{3 \sqrt{3} }{3} = \sqrt{3} [/tex]

when there is a radical in the denominator, we should rationalize (mutiply the denominator and numerator by the radical) to get rid of the radical in the denominator.

How many mL in 4 L of H2O?

Answers

Answer:

4,000 mL of H2O

How many molecules of nitrogen dioxide NO2 are in 1 mole of NO2?

Answers

Answer:

The answer is 46.0055. We assume you are converting between grams NO2 and mole. You can view more details on each measurement unit: molecular weight of NO2 or mol This compound is also known as Nitrogen Dioxide.

Explanation:

hope this helps

35 points
What are the reactants and the products in this equation?

2H2 + O2 → 2H2O


a Reactants: water; Products: hydrogen, oxygen

b Reactants: hydrogen, oxygen; Products: water

Answers

Answer:

02 ;D h2oooooooooooo

long story shortB

Explanation:

Answer:

B

Explanation:

2H2→Hydrogen peroxide

O2→oxygen

"A water molecule (formally known as dihydrogen monoxide) is composed of two hydrogen atoms and one oxygen atom. ... The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy"

"A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction."

The answer is B, hope this helps :)

Please help... giving a lot of points and awarding brainliest.

Answers

Theoretical Yield of H2SO3: 31.2 g
Percent Yield: 67.4%

Theoretical Yield of C2H6: 6.50
Percent Yield: 88.7%

Theoretical Yield of HF: 3.84
Percent Yield: 71.4%

The best description of the Big Bang Theory is ______________
A. The universe began with cold dense energy compressing into matter after which all matter and energy began rapidly contracting toward each other.

B. The universe began with hot dense energy compressing into matter after which all matter and energy began rapidly expanding away from each other.

C. The universe began with hot dense matter after which all energy began rapidly expanding away from each other.

D. The universe began with cold, spread out matter compressing into energy, after which all matter and energy began slowly moving toward each other

Answers

The answer is the letter “c”

Answer:

B. the universe began with hot dense energy compressing into matter after which all matter and energy began to rapidly expanding away from each other.

hope it helps

properties changes if the size of an object changes?

A.mass
B.volume
C.weight
D.all of the above

Answers

Answer:

D

Explanation:

The answer should be D, when the size of an object changes it changes how much mass it has how heavy it is (weight), and how much space it takes up (volume).

Explain why Chlorine has the largest electronegativity between Ne, Mg, Ba, Sb, Hg, Li?

Answers

Answer:

Look at the image provided and try work it out. I don't have the time but I hope I helped you!

Explanation:

Find the number of moles if you have 1.2 x 1048 copper atoms.

Answers

Answer:

1.993 × 10^(24) moles

Explanation:

From avogadro's number, we have that;

1 mole of atoms contain 6.022 × 10^(23) atoms

Therefore, 1.2 x 10^(48) atoms of copper will contain;

(1.2 x 10^(48) × 1)/(6.022 × 10^(23)) = 1.993 × 10^(24) moles

how can a substance stay at a certain temperature even though it is being heated?​

Answers

The temperature of a certain substance can be seen as the average speed of the atoms or molecules in that substance. In the liquid state of a substance the forces between the atoms or molecules are strong enough to keep them together, however with enough freedom to move, unlike in the solid state. If we would have a closer look at the surface of a liquid from sideways, we would see water molecules jumping out of the water and reentering it again. The lower the water temperature would be the lesser the amount of water molecules leaving the liquid phase would be. If water would be heated up and the temperature will reach 100 degrees C at normal atmospheric pressure, more water molecules would leave the water than reentering. Boiling has started. The temperature of the water remains at 100 degrees C, if the heating continues as the average speed of molecules will not increase, only the rate of molecules leaving the water will increase, until all the water in liquid state has been vapourized. The amount of heat needed to vapourize liquid water is called latent heat. Latent heat is a very important driving factor in the atmosphere and thus the weather.

To Identify a mineral, there are tests that are used including:

Answers

Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction.

HELP PLZZZZZZZZZZZZZ I WILL GIVE BRAINLIST!!!!!!!!!!!
If you place Alka -Seltzer tablets in a closed container of water, the tablets effervescence then produce a gas. What will eventually happen inside this closed container?

A. Not enough information to determine.
B. The pressure decreases.
C. The pressure increases.
D. The pressure remains the same.

Answers

Answer:

c the pressure increases

What is meant by the dual wave-particle nature of light?

Answers

In physics and chemistry, wave-particle duality holds that light and matter exhibit properties of both waves and of particles. ... The idea of duality is rooted in a debate over the nature of light and matter dating back to the 1600s, when competing theories of light were proposed by Christiaan Huygens and Isaac Newton. I Hope this helps you. Lol

Dual wave particle nature of light  can be regarded as mechanism that says light and matter will also has the properties of  waves as well as that of  particles.

This concept is found in mechanics as it describes how light and matter also has the properties associated with waves as well as particles.

The duality explained inadequacy of conventional concepts of both wave and particle so as to give explanation about behaviour of quantum objects.

the dual nature of light made us to understand that light has wave properties and it also has particle properties.

Some of the properties of wave that light has are:

wavelengthspeed

Therefore, duality means have both characteristics of light and wave

Learn more at,: https://brainly.com/question/14326678?referrer=searchResults

Assume that a 100-base pair DNA double helix contains 45 cytosine bases. Use logical thinking to figure out how many adenine bases there will be. Explain how you know.

Answers

Answer:

You will not be allowed to have any learning aids while taking a test or ... A DNA molecule consists of three parts—a nitrogen base, ... There are four DNA nucleotides, each with one of the four nitrogen bases (adenine, thymine, cytosine, and guanine). The DNA forms a two-stranded spiral, or double helix.

Explanation:

hope this helps ✌️

27.2Pb(NO3)2 --> 2Pb0 + 4NO2 + O2
O A. Synthesis
B. Single displacement
C. Decomposition
D. Combustion

Answers

The answer is c decomposition.

how can acids cause chemical weathering

Answers

Acid rain slowly dissolves rocks due to chemical reactions between the acid and the minerals in the rock. Differential Weathering: Softer, less resistant rocks wear away at a faster rate than more weather resistant rocks. More exposure to acid rain results in more rapid weathering.

The acids react with the chemical composition of the rock causes the disintegration of the rocks.

Chemicals when react with the chemical components of the rocks cause the disintegration of the chemical and physical structure of rocks which cause breakage of rocks into parts. This process is called chemical weathering.

For example, the sulfur dioxide gas in the air reacts with the water in the air to form the acid rain.

The acid rain reacts with the chalk or limestone rock that causes the disintegration of the chemical structure and physical structure of rock causing breakage of the chalk or limestone.

Learn more about weathering:

https://brainly.com/question/14426457

Is Mg(CH3COO)2 soluble or insoluble

Answers

Answer:

It is Soluble

Explanation:

Name- Magnesium acetate

It dissolves easily in water and alcohol.

Which formula below can be used to calculate speed?

Speed = Volume ÷ Mass


Speed = Time ÷ Distance

Speed = Mass x Acceleration

Speed = Distance ÷ Time

Answers

Answer:

The answer is Speed= Distance ÷ Time

Explanation:

To work out what the units are for speed, you need to know the units distance and time.

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