I need help with this

Elements are placed in order on the periodic table based on their atomic number, how many protons they have. In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number.

Answer:

The alkali metals are the highly electropositive metals. Highly electropositive metals cannot be extraction carbon reduction process, because these metals do not react with carbon

Explanation:

A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.

We have 2 containers connected by a valve.

One container has a volume of 3.00 L and contains O₂ at 4.00 atm. The other container has a volume of 2.00 L and contains Ne at 2.00 atm.

When the valve is opened, the total volume is the sum of the 2 containers.

[tex]V_2 = 3.00 L + 2.00 L = 5.00 L[/tex]

Assuming constant temperature and ideal behavior, we can calculate the final pressure of each gas using Boyle's law.

O₂

[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{4.00atm \times 3.00L}{5.00L} = 2.40atm[/tex]

Ne

[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{2.00atm \times 2.00L}{5.00L} = 0.800atm[/tex]

The final pressure in the container will be the sum of the final pressures of the gases.

[tex]P = 2.40 atm + 0.800 atm = 3.20 atm[/tex]

A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.

Learn more: https://brainly.com/question/1437490

Answer:

5

Explanation:

The elements contained in this equation are:

Na

Cl

H

S

O

Answer: essay the answer is B: precipitation

Explanation:

Answer:

A

Explanation:

8×2 + 10×1 = 26

so to balance it:

26÷2=13

For the given combustion reaction of butane gas, there are total 26 oxygens in the product side. Thus, the coefficient of O₂ must be 13 to equate both sides.

The balanced chemical equation for a reaction represents the perfect stoichiometry of each reactants and products in the reaction. According to mass conservation law, the total mass in the product side must be equal to the total mass in the reactant side.

Therefore, each element must be equal in number on both side. The balanced equation for the combustion of butane is given below:

[tex]\rm 2 C_{4}H_{10} + 13 O_{2} \rightarrow 8 CO_{2} + 10 H_{2}O[/tex]

Now only the number of oxygen is balanced on both side. Hence, the proper coefficient for balancing oxygen in the complete combustion of butane gas is 13.

To find more on balancing reactions, refer here:

https://brainly.com/question/22064431

#SPJ2

Answer:

20 / 33

Explanation:

Have a great day

Brainlyest plz

Answer:

Volume x Density = Mass of a substance

1300 x 0.67 = 871

The mass is 871 (unit)

Answer:

Explanation:

Ca = +2

P = -3

Se = 0

NH3=

N = -3 , H = +1 , H3 = 3 x +1 = +3

-3 + (+3) = 0

NH3 = 0

NF3

N = -3, F = -1 , F3 = 3 x (-1) = -3

-3 + -3 = -6

Al2(CO3)3

CO3

C= +4, O = -2, O3 = 3 x (-2) = -6

CO3 = +4 + (-6) = +4 - 6 = -2

(CO3)3 = 3 x (-2) = -6

Al = +3, Al2 = 2 x (+3) = +6

Al2(CO3)3 = +6 + (-6)= 0

While he was researching and writing that book in the 1860s, Mendeleyev made the discovery that led to his most famous achievement. He noticed certain recurring patterns between different groups of elements and, using existing knowledge of the elements' chemical and physical properties, he was able to make further connections. He systematically arranged the dozens of known elements by atomic weight in a grid-like diagram; following this system, he could even predict the qualities of still-unknown elements. In 1869, Mendeleyev formally presented his discovery of the periodic law to the Russian Chemical Society.

Hope This is Ok :)

Answer:

Explanation:

Atoms are the thing that make up molecules and compounds. Molecules contain two or more atoms and are held together by covalent bonds

Answer:

That should be crucible tong

Answer:

yes is it yes yes yes yes yes yes yes yes yes yes

Answer:

Highway 22 ,GA 31820

Explanation:

4. O²-

O²- has 16 electrons while Ne has 18 electrons. O²- is a molecule that has one electron added to each atom, meaning that there are two extra electrons which makes O²- the same electron configuration as of Ne atom.

The forces of attraction that exists between positive metal ions and their surrounding valence electrons is called: metallic bonds.

A chemical bond can be defined as the forces of attraction that exists between ions, crystals, atoms or molecules and they are mainly responsible for the formation of all chemical compounds.

In Chemistry, there are different types of chemical bonds and these are:

A metallic bond can be defined as the forces of attraction that exists between positive metal ions and their surrounding valence electrons.

This ultimately implies that, metallic bond are peculiar to positively charged metals but not negatively charged metals or non-metals.

Read more: https://brainly.com/question/24212500

Answer:

The nucleus of atom is composed of two subatomic particles that each have charges.

Both reside in the nucleus of an atom. The amount of protons and neutrons (Electrons can to) is what helps us identify each atom apart. Electrons are NOT in the nucleus of atom but orbit it in outer layers called orbitals.

Answer:

see explanation

Explanation:

How is the relatively high melting point of sodium chloride related to its structure at the atomic scale? Observe sodium chloride crystals with a hand lens. Use your observations and the model of sodium chloride to support your claim.

Unlike the raltively low melting point of water (100 °C), NaCl has a much higher melting point (801 °C),.

Theater molecules in ice are held together by hydrogen bonds, which are relatively weak.

The ions in NaCl are held together by  ionic bonds, whose electrostatic ,force is much greater.

The crystal structure makes the force even greater.

imagine a chloride ionin a NaCl crystal.

It has Na ions in front, behind, to the left, to the right, above and below.

Likewise the Na ion has Cl ions in front, behind, to the left, to the right, above and below.

It takes a lot of energy to berak these bonds and temprature is a measure of energy.

if you try the experiment make certain you are undr a fune hood and wear protective loves and apron.   801 °C can seriously burn skin and clothing

The temperature at which the liquid and the solid of refined compounds and elements can occur stable and in equilibrium is called the melting point.

Therefore, the melting point is related to the structural organization of the atoms.

Learn more about a melting point here:

https://brainly.com/question/19086731

Answer:

q

=

64 kJ this is answer. .

Answer:

oxygen, carbondioxide

carbondioxide, oxygen

The effects of long-term exposure to mustard gas causes mortality and chronic respiratory disease.

Exposure to mustard gas in the long term can result in mortality from influenza, pneumonia as well as chronic breathing disease. Exposure for long term leads to respiratory complications and septic shock. Extensive breathing in the environment of mustard gas can cause chronic respiratory disease, respiratory infections or death.

Extensive eye exposure to this gas can cause permanent blindness. Exposure to mustard gas may also increase the chances of lung and respiratory cancer so we can conclude that mustard gas is lethal and can cause a number of diseases in a person who is exposed to it.

Learn more: https://brainly.com/question/25686553

Answer:

5.52

Explanation:

2.76 10^-3 M = 2.76mM

2.76mM*2L= 5.52mmol

Answer:

It changes size and shape

Explanation:

Proving Air Is Matter

One way to prove that air is made of matter is to blow up a balloon. Before you add air into the balloon, it is empty and shapeless. When you puff air into it, the balloon expands, so you know it is filled with something—air is taking up the space.

El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.

De acuerdo con el enunciado de esta pregunta, debemos encontrar un valor de [tex]m[/tex] a partir del siguiente sistema de ecuaciones:

[tex]r\cdot (r+2) = 4\cdot m \cdot r -8[/tex] (1)

[tex]2\cdot r \cdot (2\cdot r + 2) = 4\cdot m \cdot (2\cdot r) - 8[/tex] (2)

Ahora simplificamos el sistema de ecuaciones:

[tex]r^{2}+2\cdot r = 4\cdot m\cdot r - 8[/tex] (1b)

[tex]4\cdot r^{2}+4\cdot r =8\cdot m\cdot r - 8[/tex] (2b)

Despejamos [tex]m[/tex] en cada expresión, lo eliminamos y resolvemos el polinomio resultante:

[tex]\frac{r^{2}+2\cdot r + 8}{4\cdot r} = \frac{4\cdot r^{2}+4\cdot r +8}{8\cdot r}[/tex]

[tex]r^{2}+2\cdot r + 8 = 2\cdot r^{2}+2\cdot r +4[/tex]

[tex]r^{2}-4 = 0[/tex]

[tex]r^{2} = 4[/tex]

[tex]r = \pm 2[/tex]

Finalmente, determinamos el valor de [tex]m[/tex], que al ser positivo, debemos utilizar [tex]r = 2[/tex]:

[tex]m = \frac{2^{2}+2\cdot 2 + 8}{4\cdot 2}[/tex]

[tex]m = 2[/tex]

El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.

Invitamos cordialmente a ver esta pregunta sobre polinomios de segundo orden: https://brainly.com/question/15792293

Answer:

C. Al

Explanation:

2Al+ 3H2SO4(l)------> Al2(SO4)3+ 3H2

Answer:

The Correct IUPAC name is H3C - CH (CH3) - CH (C2H5) - (CH2)2 - CH3 Class 11

Explanation:

yes searched np is maybe right i not 100% sure i 50% is it right >:) tell if u got it right >:D

Answer:

4-ethyl-6-methyl-3-heptene

Explanation:

Longest chain is seven long so it is heptane

But there is a double bond, so that becomes heptene

The double bound starts on the third carbon, so it is 3-heptene (this tells us where the double bond is)

Now we just got to do the substituents!

There is a ethyl group of the fourth carbon and then a methyl group on the sixth!

Ergo, 4-ethyl-6-methyl-3-heptene

Answer:

iron .. titanium.. nickel....aluminum... sulfur... and calcium