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Answer:

d)Lithium sulfite, Li2SO3

Explanation:

LITHIUM is an element in the group 1 (alkali metals) of the periodic table, with a charge of +1. On the other hand, SULFITE is a radical with the chemical formula (SO3²-). It is made up of sulfur and oxygen atoms.

According to this question, lithium element and sulfite radical combines to form a compound called LITHIUM SULFITE. From the chemical formula of these individual constituents, the chemical formula of the compound formed will go this: Li2SO3. This means that it takes 2 atoms of Li+ to combine with SO3²- in order to form a neutral compound.

Answer:

Q = 382.5 Kj

Explanation:

Given data:

Mass of block = 10.00 Kg

Initial temperature = 10.0°C

Final temperature = 95.0°C

Specific heat capacity of iron = 0.45 KJ/Kg.°C

Energy given = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 95.0°C - 10.0°C

ΔT = 85.0°C

Q = 10.00 Kg×0.45 KJ/Kg.°C×85.0°C

Q = 382.5 Kj

Answer:

the answer is 58.5g

Explanation:

23+35.5=58.5g

Answer:

Because Democritus or Liucipius cannot demonstrate or proof their ideas as they did not have any equipment or any research to prove the existence of atoms.

Explanation:

John Dalton, Democritus and Leucipius are some of the greatest scientist and scholars of the past.

Democritus originally proposed or gave the idea of the of the composition of the matter of indivisible and tiny particles. John Dalton is credited for the beginning of the modern atomic theory.

Democritus believed that a matter is made up of atoms that can move about empty spaces. They are small, indestructible, solid, indivisible and of different shapes and sizes. Democritus proposed his idea at that time as there were no scientific advancement or instruments to prove his ideas about atoms.

Later on when science and scientific processes were advanced, Dalton was able to prove and proceed on the atomic model theory.

Democritus cannot prove his ideas as there were no instruments or advance scientific processes and so people felt his ideas as illogical. His proposals were based on his ideas.  

Answer:

Gold

Explanation:

Gold(I) chloride is a compound of gold and chlorine with the chemical formula AuCl

Answer:

A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. Therefore the answer is chemical.

Explanation:

Brainliest?

Answer:

the correct anwser is D

Explanation:

24 ml of HCl is produced. when propane is react with chlorine it forms 24 ml of HCl.

Propane, also referred to as liquefied petroleum gas, or LPG, is a gas that is typically compressed and kept in liquid form. It is virtually odorless, harmless, and colorless; an identifying odor is added to make it detectable.

Although propane is frequently used for space and water heating, cooking, and as fuel for engines found in fleet cars, buses, forklifts, and farm irrigation engines, its usage are expanding quickly as a result of new technological advancements.

Propane is referred to as propane autogas when it is utilized as a car fuel.

Therefore, 24 ml of HCl is produced. when propane is react with chlorine it forms 24 ml of HCl.

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Answer:

Explanation:

The highlighted elements of the periodic table belong to the alkali metal element family. The alkali metals are recognized as a group and family of elements. These elements are metals. Sodium and potassium are examples of elements in this family.

hope this helps

Answer:

I think it is 20

Explanation:

Answer: 20, Hope this helped!

Explanation:

Answer:

1. D   2. C   3. B

Explanation:

1. The product is always what is being yielded from the equation, or what is created. Since both 4H2O and 3CO2 are created from the reactants, they are both products of the reaction.

2. The Law of Conservation of Matter states that matter cannot be created, nor destroyed. Therefore, C is not true because new atoms cannot be created in a reaction.

3. The second formula is balanced, but the first is not

Energy required : 2508 J

Given

V= 120 ml

Δt = 5°C

Required

Heat needed

Solution

Heat can be formulated :

Q = m.c.Δt

m = mass, g  

c = specific heat, joules / g °C  (water=4.18 J.g °C)

∆T = temperature difference, ° C / K  

mass water = 120 g(density = 1 g/ml)

Input the value :

Q = 120 g x 4.18 J.g °C x 5 °C

Q = 2508 J

Answer:

D. Isotope 51

Answer:

a) 2, 6

a) 6

b) neutrons and protons are found in the nucleus with the electrons.

Explanation:

1.

Electronic configuration entails the arrangement of electrons within an atom. Therefore, to do this, we must know the number of electrons in the element given.

since we have been given oxygen atom, the number of electrons therein is 8.

 So;

    the electronic configuration is 2,6

2.

The atomic number of an atom is the same as the number of protons that it contains. The proton number is the number of positively charged particles in the atom of the element.

Since we have been given that the number of protons within the atom is 6, therefore, the atomic number is 6.

3.

It is false that the nucleus of an atom contains protons, neutrons and electrons. Electrons are not found in the nucleus of any atom. Only the process of electron capture during radioactivity can make this happen.

Electrons are found orbiting the atomic space in discrete energy levels.  

Answer:

covalent

Explanation:

flourine and sulfur are both nonmetals/anions, therefore it is covalent.

Answer:

6,1,2

Explanation:

_Ag + _N2 => _Ag3N

LHS RHS

Ag=1×6=3 Ag=3×2=6(Balanced)

N=2×1=2 N=1×2=2(Balanced)

coefficient=6,1,2

Answer:

I think a tell me if I am wrong

Answer:

chlorine dioxide is empirical formula for CLO2.

Answer:

[tex]\boxed {\boxed {\sf About \ 1.94 *10^{-8} \ mol \ H_2S}}[/tex]

Explanation:

To convert from molecules to moles, Avogadro's Number must be used.

This number tells us how many particles (atoms, ions, molecules, etc.) are in 1 mole of a substance. For this problem, it is moles of hydrogen sulfide.

We can use the number as a fraction.

[tex]\frac { 6.022 *10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S}[/tex]

Multiply by the given number of molecules.

[tex]1.17*10^{16} \ molecules \ H_2S *\frac { 6.022 *10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S}[/tex]

Flip the fraction so the molecules of hydrogen sulfide will cancel out.

[tex]1.17*10^{16} \ molecules \ H_2S *\frac {1 \ mol \ H_2S }{ 6.022 *10^{23} \ molecules \ H_2S}[/tex]

[tex]1.17*10^{16} *\frac {1 \ mol \ H_2S }{ 6.022 *10^{23} }[/tex]

[tex]\frac {1.17*10^{16} \ mol \ H_2S }{ 6.022 *10^{23} }[/tex]

[tex]1.94287612*10^{-8} \ mol \ H_2S[/tex]

The original measurement of molecules had 3 significant figures so we must round our answer to that.

For the number we calculated, that is the hundredth place. The 2 in the thousandth place tells us to leave the 4 in the hundredth place.

[tex]1.94 *10^{-8} \ mol \ H_2S[/tex]

There are about 1.94*10⁻⁸ molecules of hydrogen sulfide.

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is "mol." This site uses an exact value of 6.0221415 x 10 23 for Avogadro's number. This is the number of atoms in 1 mole of a chemical element.

Hope I helped :)

Answer:

[tex]1212.42\ \text{mph}[/tex]

Explanation:

We need to convert [tex]542\ \text{m/s}[/tex] to [tex]\text{miles/hour}[/tex]

[tex]1\ \text{mile}=5280\ \text{ft}[/tex]

[tex]1\ \text{ft}=12\ \text{inches}[/tex]

[tex]5280\ \text{ft}=5280\times 12=63360\ \text{inches}[/tex]

[tex]1\ \text{inch}=2.54\ \text{cm}=0.0254\ \text{m}[/tex]

[tex]63360\ \text{inches}=63360\times 0.0254=1609.344\ \text{m}[/tex]

So

[tex]1\ \text{mile}=1609.344\ \text{m}\\\Rightarrow 1\ \text{m}=\dfrac{1}{1609.34}\ \text{miles}[/tex]

[tex]1\ \text{hour}=60\times 60\ \text{seconds}\\\Rightarrow 1\ \text{s}=\dfrac{1}{3600}\ \text{hour}[/tex]

[tex]542\ \text{m/s}=\dfrac{\dfrac{542}{1609.34}}{\dfrac{1}{3600}}=1212.42\ \text{mph}[/tex]

The speed of the gas molecules is [tex]1212.42\ \text{mph}[/tex].

Answer: Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. ...

Use coefficients of products and reactants to balance the number of atoms of an element on both sides of a chemical equation.

Answer:

Three states of matter is liquid, solid and gas.

I haven't learned atoms, I just learned the states in 5th grade.

Answer:

the three states of matter are

1. solid ( atoms are closely packed )

2. liquid ( atoms are loosely packed )

3. gas ( atoms are very loosely packed )

Three uses of coal:

1. Electricity generation

2. Steel production

3. Cement manufacturing and as a liquid fuel

Hope it helps!

Pure copper will be left in the vial when CuCl_2 (Copper Chloride,) a solid powder, is reacted with Aluminum (Al), a solid, in a solution.

Hence, option D is correct.

A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.

Aluminium reacts with copper(II) chloride, [tex]CuCl _2[/tex], to form copper metal and aluminium chloride, [tex]AlCl _3[/tex].

Hence, option D is correct.

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Answer:

I have nice handwriting what are they on?

Explanation:

Hey there ..

Ur answer

Please mark me brainliest if u found it helpful ..

Thank u

Answer:

Explanation:

A new Material is formed.

Basically, Chemical changes differ from Physical changes because in chemical changes, Substances have the ability to become a different substance.

Example:

Water to ice is a physical change because it is still water despite being a solid from liquid.

A Magnesium strip placed in CuSO4 solution made the Mg strip turn into a new substance which is MgSO4. this is a Chemical change because Mg has now become a different substance called MgSO4.