There are only 90 naturally occurring elements on Earth but there are millions of different substances explain how this is possible and describe how it applies to at least three examples
Answer:
See explanation
Explanation:
While it is true that there are only about 90 naturally occurring elements, these elements are capable of combining with each other to form millions of substances.
Most of the substances that we see around us today result from a combination of one or more of these naturally occurring elements.
Let us look at three examples;
The carbohydrate in food is composed of carbon, hydrogen and oxygen
The stainless steel materials we use are composed of iron, carbon and other trace elements
Glass is made up of silicon, oxygen and other elements
Only 90 naturally occurring elements capable of combining with each other to form millions of substances.
Compounds:
When two or more elements combine in a certain ratio to form a molecule.
For example-
Water is made up of two hydrogen and one Oxygen ration is 2:1.
If hydrogen and Oxygen combine inn 2:2, they for Hydrogen peroxide.
Water gives life and Hydrogen peroxide can kill a person.
Other examples are,
The carbohydrate in food is composed of carbon, hydrogen and oxygen. The stainless steel is made up of iron, carbon and other trace elements. Glass is composed of silicon, oxygen and other elements.Therefore, only 90 naturally occurring elements capable of combining with each other to form millions of substances.
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Where does energy FIRST come into an ecosystem?
Answer:
Ecosystem Energy Flow Nearly all of the energy that drives ecosystems ultimately comes from the sun. Solar energy, which is an abiotic factor, by the way, enters the ecosystem through the process of photosynthesis. You can learn more than you want to know about this process in the unit on photosynthesis.
Explanation:
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0:44
1x
Rex and Lincoln push on a box,
as shown. Rex pushes with a force of 45 N to the right and Lincoln
pushes with a force of 15 N to the left. The mass of the box is 40 kg.
Assess the magnitude of the box's acceleration.
Net force =
Answer:
no sense to dime
Explanation:
685(858)
what happens when a book falls of a desk?
I'd barely seen you when you asked me if I hated you
Wasn't surprised but still had nothing I could say to you
I'm sorry if I ever made you feel the way you do
Yeah, I know I know you better than your parents
I heard about 'em, you don't gotta be embarrassed
You go online 'cause that's where you can be the saddest
You've been acting careless
Know you put on a happy face
You need someone who's gonna stay
I know you're crushed under the weight
Wanna hold you up, wanna hold you up
You keep things bottled up inside
I wish you'd give someone a try
You fell apart a million times
Wanna hold you up, wanna hold you up
Before my heart gives out
You're losing track of all the friends I know you used to have
Don't know what happened but the old you wasn't half as bad
I'm sorry no one sees what's going on inside your head
Yeah, I know I know you better than your parents
I heard about 'em, you don't gotta be embarrassed
You go online 'cause that's where you can be the saddest
You've been acting careless
Know you put on a happy face
You need someone who's gonna stay
I know you're crushed under the weight
Wanna hold you up, wanna hold you up
You keep things bottled up inside
I wish you'd give someone a try
You fell apart a million times
Wanna hold you up, wanna hold you up
Before my heart gives out
I know that you hate when I figure you out
You get so distant just so you can hear a sound
Swear that you've been gone but yet your body's still around
What are you doing now?
Know you put on a happy face
You need someone who's gonna stay
I know you're crushed under the weight
Wanna hold you up, wanna hold you up
You keep things bottled up inside
I wish you'd give someone a try
You fell apart a million times
Wanna hold you up, wanna hold you up
Before my heart gives out
Answer:
Happy Face excellent song
Explanation:
and gravity takes the book and pulls it to the ground
A simple machine that has
disc with a grooved rim to wind up a string called is_____
Answer:
PULLEY
Explanation:
A pulley is an example of a simple type of machine. It is either a wooden or a metallic disc which can rotate about a horizontal axis passing through its centre. It has a grooved rim along which a rope or chain can slide. It is generally mounted in a frame work called a block.
You come home and find that there's been a power outage while food was cooking in the slow cooker. What should you do wit the food?
A. Serve it right away.
B. Refrigerate it until the power comes back on.
C. Reheat it on the stovetop.
D. Feed it to the dog.
E. Throw it away.
Answer:
Well you can not serve it because it is a slow cooker it cooks slow and the refrigerator uses power.Stove tops use power too, I wouldn't feed it to the dog because it whatever you made could possibly make the dog sick and throwing it away is a waste of money. Out of all of those explanations choose the best one. Which ever one you pick whether right or wrong, think about it.
Explanation:
In this complete ionic equation of a double replacement reaction, circle the spectator ions
and write the net ionic equation.
Na2Co3 (aq) +2HNO3 (1) ---> 2NaNO3 (aq) +H20 (1) +CO2 (g)
Complete ionic equation:
2Na + CO3- + 2H + 2NO3 -----> 2Na + 2NO3 + H2O + CO2 (g)
Net ionic equation:
Answer:
CO3-+2H----->H2O+CO2
Explanation:
If you need to produce 9.75 moles of iron(III) oxide (Fe2O3), how many moles of iron will be required? *
Answer: Thus 9.75 moles of iron will be required.
Explanation:
The balanced chemical reaction is:
[tex]2Fe+3O_2\rightarrow 2Fe_2O_3[/tex]
According to stoichiometry :
2 moles of [tex]Fe_2O_3[/tex] are produced by= 2 moles of [tex]Fe[/tex]
Thus 9.75 moles of [tex]Fe_2O_3[/tex] are produced by=[tex]\frac{2}{2}\times 9.75=9.75moles[/tex] of [tex]Fe[/tex]
Thus 9.75 moles of iron will be required.
Describing Metallic Bonding Theories
Which statements describe the electron sea
model? Check all that apply.
Electrons all have approximately the same
energy.
Electrons move among orbitals of different
energies.
Electrons move freely among atoms
(delocalized)
Answer:
A. Electrons all have approximately the same energy.
C. Electrons move freely among atoms (delocalized).
Next Question:
B. Electrons move among orbitals of different energies.
C. Electrons move freely among atoms (delocalized).
Explanation:
Electron sea model
Electrons move freely among atoms (delocalized).Electrons all have approximately the same energy.Metallic Band theory
Electrons move among orbitals of different energies.Electrons move freely among atoms (delocalized).Electron sea model is one of the simplest form of metal bonding model. Its bonding is as a result of the sharing of valence electrons. The electrons here are delocalized which serve as the gum that keeps the metal atoms together.
Conclusively, we can say Electron sea model
Electrons move freely among atoms (delocalized).Electrons all have approximately the same energy.Metallic Band theory
Electrons move among orbitals of different energies.Electrons move freely among atoms (delocalized).Learn more from:
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PLEASE HELPPP ITS DUE SOON
Answer:
it is a. i know I am right.
Explanation:
which substance could any excess not be removed by filtration
Answer:
sodium hydroxide
Explanation:
i think sodium hydroxide
Which phrase describes the changes that take place when a gas condenses?
Choose the correct answer
A: loss of energy and increased freedom of particle motion B: gain of energy and increased freedom of particle motion. C: loss of energy and decreased freedom of particle motion
D: gain of energy and decreased freedom of particle motion
Answer:
The Answer is (C)
Explanation:
Reasons are when anything cools or condenses it tends to be more solid, and solids don't move.
Loss of energy and decreased freedom of particle motion describes the changes that take place when a gas condenses. The correct option is option C.
What is phase?The phases of matter, such as liquid, solid, and gas, are its states, yet even in distinct phases, matter can still be in the same condition. Liquid mixes, for instance, can have several phases, including an oil phase as well as an aqueous phase.
On a phase diagram, equilibrium states may also be referred to as phases. Because the characteristics that define the phase include the structure of matter as well as elements like temperature and pressure, when the word "phase" is employed in this context, it is frequently used synonymously with a state of matter. Loss of energy and decreased freedom of particle motion describes the changes that take place when a gas condenses.
Therefore, the correct option is option C.
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is a certification is a official document starting a level of acheivement
Answer:
A certificate of achievement is a recognition of progress or completion given out by a variety of institutions, including employers, primary schools, secondary schools and institutions of higher learning.
if an element's electron configuration ends with "_p5", it belongs to what
family.
Answer:
srry need pts
Explanation:
show that the molecular formula of urea is CH4ON2 if the %by mass of 02 atoms is one mole of urea molecule is 26.66%
Answer:
Mostly, the molecule has a planar geometry allows free rotation of bonds. The chemical structure of the compound could be given as below. Urea Formula Molecular Mass. This molecule is generally available in final products of proteins of metabolism of humans and animals. Its main existence can be felt in the urine of humans that is formed
Explanation:
the molecular formula of urea is CH4ON2 if the %by mass of 02 atoms is one mole of urea molecule is 26.66%
What is the chemical name of the compound K2504?
Answer:
Potassium sulfate
Explanation:
I searched it up on the internet
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Calculate the density a rectangular block of a metal whose length is 8.335cm width is 1.02cm height is 0.982cm and mass is 62.3538gm.
Answer:
Density rectangular block = 7.47 (Approx) gm/cm³
Explanation:
Given:
Length = 8.335 cm
Width = 1.02 cm
Height = 0.982 cm
Mass = 62.3538 gm
Find:
Density rectangular block
Computation:
Volume of block = lbh
Volume of block = (8.335)(1.02)(0.982)
Volume of block = 8.3486 cm³
Density = Mass / Volume
Density rectangular block = 62.3538 / 8.3486
Density rectangular block = 7.47 (Approx) gm/cm³
I need help ASAP… look at the picture:)
Determine el volumen de las siguientes figuras: Un cubo de 3.5 cm. De lado. Una esfera de 5.8 cm. De diámetro. Cubo A= l 3 Esfera A = 4 π R 2
Answer:
42.875cm³ ; 422.73 cm³
Explanation:
Given that:
Volume of a cube (V) = a³
a = 3.5cm
V of a cube = (3.5cm)^3
Volume of a cube = 3.5cm * 3.5cm * 3.5cm
Volume of a cube = 42.875cm³
Volume of a Sphere, V = 4πR²
V = 4 * π * 5.8²
V = 4 * π * 33.64
V = 422.73270
V = 422.73 cm³
What is the density of argon gas (MM = 39.9 g/mol) at 101 kPa
and 0 °C?
Answer:
1.78 g/L
Explanation:
need help on this fast
How does this action cause the skateboarder's speed to decrease?
O A. It increases the maximum static friction of the skateboard.
B. It increases the net force down the hill.
O c. It increases the force of friction.
O D. It decreases the force of friction.
Answer:
The answer is B
Explanation:
B is your answer hopes this helps you
Explain how both analytical and creative problem-solving strategies can be applied to the following scenario. Jeff notices that his family's trashcan overflows the day before trash pickup each week. He suggests getting a bigger trashcan to solve the problem. Jeff's father tells him that the size and number of trash bags they can set out each week is limited by a city ordinance.
Answer: They can be apllied to the senario he can pettition or he can use bigger bags those are just a couple of ideas.
why bleaching powder doesn't dissolve in water completely?
Answer:
bleaching powder is actually a mixture of calcium chloride, calcium hydroxide and calcium hypochlorite. hence it is not a single salt. It is not completely soluble in water as it composed of heavy calcium salts, which are known to be insoluble in water.
Answer:
It does disolve
Explanation:
It depends on how much bleaching powder you're trying to dissolve in water
A motorcyclist completes a journey at an average speed of 65 mph
in 3.5 hours. Calculate the distance traveled.
What is/are the product(s) of the reaction, when an amphoteric oxide reacts with acid or base?
aba warmatebebi testis paxusebze :()
1. Hard water has about 150 ppm CaCO3. How many grams of calcium carbonate are in
3.84 L (1 gallon) of water? water's density is 1000 g/1L
Answer:
William Shakespeare (bapt. 26 April 1564 – 23 April 1616)[a] was an English playwright, poet, and actor, widely regarded as the greatest writer in the English language and the world's greatest dramatist.[2][3][4] He is often called England's national poet and the "Bard of Avon" (or simply "the Bard").[5][b] His extant works, including collaborations, consist of some 39 plays,[c] 154 sonnets, two long narrative poems, and a few other verses, some of uncertain authorship. His plays have been translated into every major living language and are performed more often than those of any other playwright.[7] They also continue to be studied and reinterpreted.
Shakespeare was born and raised in Stratford-upon-Avon, Warwickshire. At the age of 18, he married Anne Hathaway, with whom he had three children: Susanna and twins Hamnet and Judith. Sometime between 1585 and 1592, he began a successful career in London as an actor, writer, and part-owner of a playing company called the Lord Chamberlain's Men, later known as the
Which of the following are the functions of the Digestive System? Select 2.
A:Wastes are eliminated from the body.
B: Breaks down food into molecules the body can use.
C: Moves oxygen from the outside enviornment into the body?
D: Helps the body move.
Answer:
B: Breaks down food into molecules the body can use.
Explanation:
This is because the digestive system digests food + takes the nutrients from the food you eat. :)
find electron proton and neutron for 17cl
Answer:
Electron= 17
Proton= 17
Neutron= 35 -17
=18
Please help me like now please
Answer:
1-1) NaHCO3 + CH3COOH --> NaCH3COO + H2O + CO2
1-2) 0.5 mole of CO2
2-1) 2C4H10 + 13O2 --> 8CO2 + 10H2O
2-2) 4 mol CO2
Explanation:
Question 1
NaHCO3 + CH3COOH --> NaCH3COO + H2O + CO2
To balance the equation, count the number of atoms on both sides of the equation
(1 Na, 1+3+1H, 1+1+1C, 3+2Oxygen) --> (1 Na, 1+1+1C, 3+2H, 2+1+2Oxygen)
Combining the pluses will give you the following
(1 Na, 5H, 3C, 5Oxygen) --> (1 Na, 3C, 5H, 5Oxygen)
Both sides are the same, therefore the chemical equation is balanced (originally).
From the equation, we can see that 1 mole of NaHCO3 produces 1 mole of CO2.
So that means 0.5 mole of NaHCO3 would produce 0.5 mole of CO2.
Question 2
C4H10 + O2 --> CO2 + H2O
Again, count the number of atoms on both sides of the equation
(4C, 10H, 2O) --> (1C, 2H, 3O) This time left does not equal right side
You now need to find factors that can make both sides equal.
C4H10 + O2 --> 4CO2 + H2O Now the C is balanced, let's recount
(4C, 10H, 2Oxygen) --> (4C, 8+1Oxygen, 2H) H&O is still not balanced
C4H10 + O2 --> 4CO2 + 5H2O Now the H is balanced, let's recount
(4C, 10H, 2Oxygen) --> (4C, 8+5Oxygen, 10H) O is still not balanced
C4H10 + (13/2)O2 --> 4CO2 + 5H2O Now the O is balanced
(4C, 10H, 13Oxygen) --> (4C, 13Oxygen, 10H)
But because 13/2 is a fraction, we want to eliminate that by multiplying every reactant and product by 2 (the denominator).
2C4H10 + 13O2 --> 8CO2 + 10H2O Now it's completely balanced!
(8C, 20H, 28Oxygen) --> (8C, 28Oxygen, 20H) Yayy! It's balanced.
Now, 2 mol C4H10 produces 8 mol CO2.
So 1 mol C4H10 produces 4 mol CO2.