Answer: Sodium is the metal reacts vigorously with oxygen and water.
Explanation:
sodium
0:00
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)
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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If the Sun continues its evolution according to theory, what will be its last stage?
A.As a black hole
B. As a white dwarf
C. As a red giant
D. As a planetary nebula
Pls help
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.
FeO + C -----> Fe + CO2 balanced help
Answer:
2FeO + C ---> 2Fe +CO2
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
Can I please have a brainliest
Astatine, At, is below iodine in Group 17 of the Periodic Table. Which statement is most likely to be correct?
A AgAt(s) reacts with an excess of dilute aqueous ammonia to form a solution of a soluble complex.
B Astatine and KCl(aq) react to from KAt(aq) and chlorine.
C KAt(aq) and dilute sulfuric acid react to form HAt(g).
D NaAt(s) and concentrated sulfuric acid react to form astatine.
need help on this fast
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:
Which one of the following statements is true?
Answer:
A calculator has an endifiite shape because all of its atoms are touching each other
Why doesn't the air pressure crush this tiny
flower?
Answer:
because air pressure crushes masses and or grams that have a stronger gravitaional
pull
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.
Where does heat come from
Answer:
All matter contains heat energy. Heat energy is the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.
Explanation:
What is true about a neutral atom? *
a. The number of electrons and protons are always the same.
b. The number of neutrons is always the same as the number of electrons.
c. The number of protons may change.
d. The mass number can be found by knowing the number of electrons.
e. The mass number can be found by knowing the number of neutrons of the atom.
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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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:
Which compound has the smallest percent of chlorine?(1) HCl (3) LiCl(2) BaCl2 (4) NCl3
Answer:
KCI
Explanation:
Answer:
KCI
Explanation:
the most massive will have the smallest percent of Cl
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
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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Help me on this question, will give brainliest.
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
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.
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
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
what reagents can be used to test for unsaturation of hydrocarbons?
Answer:
Bromine test is used to test the unsaturation of hydrocarbons.
Explanation:
#12. How are the volume and pressure of a gas at constant
temperature related?
Answer:
The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law). Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of molecules (Avogadro's law).
Explanation:
Hope it helped :)
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.
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
3. How can a community help implement Ecological Solid Waste Management.
4. As a student, how can this program help you in your school?
Answer:
It help cause we compost food scraps and other organic wastes. We also reuse and recycle materials to organize for government and industry to develop community recycling materials.
It depend on your opinion as a student.
Explanation:
Hope it helps
Organizing a community to collect waste and implementing ecological solid waste management greatly helps to reduce pollution and landfilling also creates ideas for recycling.
What is solid waste management ?In order to build and sustain an efficient waste management programme, community-based waste management are partnerships between non-governmental organizations, governmental organizations, and the affected communities.
Community based waste management helps to direct participation and accountability of community members monitoring the collection and reduction of trash waste separation at the homestead level
Similarly they are using priceless and reusable goods on-site , recycling organic trash as well as public collection service collects and transports garbage to a treatment facility.
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