What needs to happen for a chemical change to happen?

What Needs To Happen For A Chemical Change To Happen?

Answers

Answer 1
Answer:
B). One or more new substances are formed.

Related Questions

Global Positioning System signals can tell you

Answers

Answer:

GPS use satellites and receivers to determine location. GPS can be used to find exact location, and relative location, so how far away you are from somewhere else. It can also give coordinates and directions.

What would be the correct answer please help!

Answers

Answer:

first number is the correct answer

C is the correct answer because Beryllium stops at 2p

In the reaction below, how would adding more of reactant A affect the equilibrium of the system? (2 points)
A + B ⇄ C + D

a
Shift it to the right toward the products.

b
Shift it to the left toward the reactants.

c
Equally create more products and reactants.

d
It would have no effect.

Answers

Answer:

a . Shift it to the right toward the products.

Explanation:

In the reaction, if more of the reactant A is added to the system, the reaction will shift towards the products.

If a system at equilibrium is disturbed by changing the concentration of one of the substances, all the concentration will change until a new equilibrium point is reached. If we add more reactants, the concentration is increased and the reaction shifts to the right so as to maintain the constancy of the equilibrium constant.

Answer: a . Shift it to the right toward the products.

Explanation:

What is created when rocks bend due to the compression of tectonic plates?

Faulting

Subduction

Folding

Whipping

Answers

Answer:

folding

Explanation: google told me

Answer: Folding

Explanation:

I took the quiz and i used my notes

One way that steel makers can keep steel from rusting is to coat it with zinc metal. If the
workers combine excess steel (FeNiO,) and 75.00g of zinc, how much coated steel (ZnFeNiO)
should they be able to make?

Answers

Answer:

225.4 g

Explanation:

The equation of the reaction is;

Zn(s) + FeNiO(s) ------> ZnFeNiO(s)

Since FeNiO is in excess then Zn must be the limiting reactant.

Molar mass of Zn =  65.38gmol-1

Number of moles of Zn reacted = 75g/65.38gmol-1 =1.15 moles

If 1 mole of Zn yields 1 mole of ZnFeNiO

1.15 moles of Zn yields 1.15 moles of ZnFeNiO

Mass of ZnFeNiO produced= 196gmol-1 * 1.15moles = 225.4 g

HELP PLEASE THIS IS CONFUSING

Answers

Number of moles = 8.3 x 10⁻¹³

Further explanation

The mole is the number of particles(molecules, atoms, ions) contained in a substance

1 mol = 6.02.10²³  particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's =  6.02.10²³

5 x 10¹¹ atoms of Silver :

[tex]\tt mol=\dfrac{5\times 10^{11}}{6.02\times 10^{23}}=8.3\times 10^{-13}[/tex]

List the protons, neutrons, and electrons for Ge2+
Please hurry

Answers

Answer:

32, 30 and 41

Explanation:

The problem here is to find the number of:

    Protons, neutrons and electrons in Ge²⁺

In this ion,

   We must understand that for a net positive charge to remain on an atom, the number of protons must be greater than the number of electrons.

Ge is Germanium with atomic number of 32;

So the number of protons is 32

Since the atom has lost two electrons;

  Number of electrons now is 32  - 2 = 30

Number of neutrons is 41 from the periodic table.

select the correct word or phrase to complete the statements about ionic compounds. The melting point of an ionic compound is likely to be _____ a molecular compound

Answers

Answer:

1. Higher than

2. Soultion and the liquid state

3. hard

4. Have varying solubilities  

Explanation:

Ionic bond is a type of intermolecular force formed between a metal and non metal by losing electrons from the metal. The correct phrase which complete the statement is "higher than" a molecular compound.

What is melting point?

Melting point is the temperature at which a substance converts to liquid state from solid state where both the phases are in equilibrium. Melting point of a compound depends on the bond type, purity, mass etc.

Ionic compounds are formed between a metal and non metal of higher electronegativity. Metals are electron rich and thus are able to donate electrons to an electronegative atom.

Non- metals such as O,N, halogens forms ionic bond with metals, Ionic bond are strongest of all bond types. Therefore, its very hard to break.  As well the ionic network is hard to disorder because they have perfect crystal lattice structure.

To melt a compound the intermolecular attraction have to be reduced in order  to liquify the compound. Ionic bond is strong and more thermal  energy have to be applied to weaken the bond.

Hence, melting point of ionic compounds is likely to be higher than molecular compounds.

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which number indicates the energy level of an atoms valence electrons

Answers

Period number
Hope this helps!!

How many neutrons does an atom of
Copper have in its nucleus?

Answers

answer:34.55
explanation:number of neutrons=mass number-atomic number
the mass number for copper is 63.55 so you do 63.55-29 (29 is the atomic number) and you would get 34.55

How would frictional force be affected in space?

Answers

Answer:

when two surfaces rub together in outer space, there will be friction. Friction is a surface effect and doesn't depend upon there being air. There is also a force like air resistance from the very sparse gas in space, but it will be very, very small, since space is a very good vacuum.

Explanation:

Explain why naturally occurring minerals in rocks often have a visible crystalline structure. ​

Answers

With a definite chemical composition (every time we see the same mineral it has the same chemical composition that can be expressed by a chemical formula). and a characteristic crystalline structure (atoms are arranged within the mineral in a specific ordered manner).

Hope this helps (╹◡╹)

PLZ HELP FAST BRANILIST IF RIGHT
Wegener found the fossilized remains of a reptile and a plant on different continents which are now separated by thousands of miles of ocean. The reptiles and plants could not have possibly crossed the oceans. What kind of evidence is this an example of? *
A climate
B puzzle
C fossil

Answers

Answer:

Climate?

Explanation:

A German scientist who proposed the theory of continental drift ... Land reptile fossil located on multiple continents; evidence of continental drift ... climate evidence. Tropical plant fossils found on an island in Arctic Ocean, and glacier deposits ... Lystrosaurus (fresh water reptiles) found in places now separated by oceans

How many electrons does a gallium atom give up when it becomes an ion?

Answers

Answer:

3 electrons

Explanation:

Is a CAS number a physical or chemical property

Answers

Chemical


Hope that helps

Please Help 30 Points + Brainlest Look At The Image Below And Answer The Flowing Question

Answers

Answer:

Between A and D

Explanation:

Most rocks are made of what elements?

oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium

quartz, granite, marble, limestone, shale, sandstone, obsidian, mica

carbon, hydrogen, rubidium, nickel, zink, copper, lead, gallium

lithium, nitrogen, selenium, fluorine, chlorine, antimony, gallium, tin

Answers

Oxygen,silicon,aluminum,iron,calcium,sodium,potassium,magnesium

Answer:

A. oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium

Explanation:

I NEED THIS ASAP!!

How many moles of chlorine gas are contained in 9.02 x 1023 molecules? ​

Answers

9227.46

Hope this answers your question!

A que se le considera un modelo atómico

Answers

Answer:

kjdbfskfgshfk skjdbfsk dskjbf dskjbsd dkvhsf akb

Explanation:

Answer:

modelo de Bohr

Explanation:

En el modelo de Bohr del átomo, los electrones viajan en órbitas circulares definidas alrededor del núcleo. Las órbitas están etiquetadas por un número entero, el número cuántico n. Los electrones pueden saltar de una órbita a otra emitiendo o absorbiendo energía.

This is the space surrounding the nucleus that has an overall negative charge___________. Atom Neutrons Nucleus Electrons Electron cloud Valence electrons Quarks Protons Shells

Answers

Answer:

Electron cloud

Explanation:

In an atom, the nucleus contains neutrons and protons. Electrons surround the nucleus.Protons are positively charged while electrons are negatively charged.

The space in which electrons are located is called an electron cloud. Because this region is composed only of electrons and empty space, it has an overall negative charge.

Families 1-2 and 13-18 are called the...
A. transition elements.
B. radioactive elements.
C. representative elements.
D. rare earth elements.

Answers

Answer:

C. representative elements.

Explanation:

Families 1 - 2 and 13 - 18 are called representative elements or often times, main group elements.

Elements on the periodic table belongs to four blocks which are s, p, d and f blocks. Those in the s and p-blocks are the main group elements also called representative elements. Their outer-shell are not completely filled with electrons but their inner shell is completely filled.

How many mg is 76.0 kg? Express your answer in scientific notation. Use the ^ symbol before the exponent, eg 1x10^3

Answers

76.0 kg because I know
Yeah

Milligram and kilograms are two common units of mass. one milligram is 10⁻⁶ kg. Hence, 76 Kg is 76 × 10⁶ mg.

What is mass?

Mass of a substance is the measure of its total amount. The standard unit of mass is grams (g). Mass is an extensive property which is dependant on the amount of particles in it.

There are several units of expressing mass, like gram, milligram (mg), kilogram (kg), nanogram (ng), etc. They can be interchanged between each other by certain relations.

Milligram unit is generally used to express the doses of drugs and small quantities.

One milligram = 10⁻⁶ kilograms.

Hence, 1 kg = 10⁶ mg

Therefore, 76 Kg is 76 × 10⁶ mg.

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The photo shows nervous tissue.
What is the main function of nervous tissue?
o
A. To transport materials and defend the body
B. To cover the body to protect other cells
C. To send signals to control the body
D. To contract to cause movement in the body

Answers

Answer:

The answer is c( to send signals to control the body)

Answer:

c. To send signals to control the body.

Explanation:

. It is responsible for coordinating and controlling many body activities. It stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning..

What is the correct formula for carbon ( II ) oxide

Answers

Answer:

CO

Explanation:

Carbon(ii) oxide is CO, carbon monoxide. Carbon(iv) oxide is CO2, carbon dioxide. Carbon dioxide, CO2, is caused by the complete burning of any substance containing carbon

The correct formula for the compound carbon (II) oxide is CO.

The formula of a compound is a representation of the types and numbers of atoms present in a chemical substance. It shows the chemical symbols of the elements involved and indicates the ratio of atoms in the compound.

The subscripts in the formula represent the number of atoms of each element in a molecule or unit of the compound. For example, the formula of water is H₂O, indicating that it consists of two hydrogen atoms (H) and one oxygen atom (O) bonded together.

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PLEASE HELP ME ASAP!! I WILL MARK BRAINLIEST!!!

Answers

Answer:

D

Explanation:

I did this assignment.

Answer:

D

Explanation:

The greenhouse effect is caused by the atmospheric accumulation of gases such as carbon dioxide and methane, which contain some of the heat emitted from Earth's surface. This radiation, unlike visible light, tends to be absorbed by the greenhouse gases in the atmosphere, raising its temperature.

A brick is resting on a smooth, level surface. A student applies a force of
5 N to the brick in order to move it to the right. The magnitude of the
force of fiction on the brick is also 5 N. Which statement best describes
the efect of these two forces on the brick



A the net force in the brick is 10 N toward the right, and the brick begins to move.

B the net force on the brick is 0 N, and the brick begins to move.

C the net force on the brick is 0 N, and the brick remains at rest.

D the net force on the brick is 10 N toward the right, and the brick remains at rest.

Answers

Answer: C) The net force on the brick is 0 N, and the brick remains at rest.

In the reaction A+B → C + D, what are the reactants?
O A. A and B
O B. A and C
C. Just B
O D. C and D

Answers

Answer:

A. A and B

Explanation:

The reactants in this reaction is A and B;

 Reaction:

      A + B → C + D

In a chemical reaction, the left hand side is made up of the reactants.

On the right hand side, we have the products

For the example given;

   A and B are the reactants

   C and D are the products

Why is the supply of oil in Texas decreased from its supply fifty years ago? A. Oil is a nonrenewable resource B. Oil is a renewable resource C. Oil takes sixty years to replenish itself. D. Oil wells are no longer being dug.

Answers

Answer:

A

Explanation:

The supply of oil in Texas decreased from its supply fifty years ago because oil is a nonrenewable resource.

A nonrenewable resource is one that cannot be replenished naturally at the same pace as its usage and hence, decreases and eventually gets exhausted with usage or exploitation over time. This is unlike renewable energy resource that gets replenished even with usage.

The more the oil in Texas is exploited, the more its supply or reserve will decrease. This is why the supply of oil has decreased from what it is fifty years ago.

The correct option is A.

Fluorine has 7 valence electrons. How many more electrons does it need to acheive a full outermost energy level
a
1
3
Ob
Oc
O d
10
2

Answers

One, because of the octet rule, every element wants to be like the noble gases, have a full shell, which is 8 electrons.

example of neutral outcome ?

Answers

Answer:

drops a glass cup of water outcome mad parents

Explanation:

Mad pagents mean death no surviva.

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