Na and Hydroxide formula

Answer:

A) They are different substances with different properties.

Explanation:

A chemical equation describes a chemical reaction. Reactants are starting materials and are written on the left-hand side of the equation. Products are the end result of the reaction and are written on the right-hand side of the equation.

So, A is correct.

(Also it said there were 3 options but only showed 2)

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Answer:

4.06×10^23

Explanation:

1 mole has 6.023×10^23 molecules

0.675 moles have (6.023×10^23×0.675) molecules

Answer:

1.5 mol

Explanation:

Given data:

Number of moles of H₂ = 4.5 mol

Number of moles of N₂ = ?

Solution:

Chemical equation:

N₂ + 3H₂     →        2NH₃

Now we will compare the moles of hydrogen and nitrogen.

                  H₂         :        N₂

                    3         :          1

                  4.5        :          1/3×4.5 = 1.5 mol

Thus, 1.5 moles of nitrogen are required to react with hydrogen.  

Answer:

It has 2 phosphorus atoms in 1 mol

so for 1.75 mol =2×1.75

Explanation:

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There will be two atoms of phosphorus in the 1.75 mol of calcium phosphate.

Atoms are the smallest unit of matter. In a chemical reaction, the number of atoms shows the quantity of an element in the compound or reaction. Phosphorus is a chemical element that is preset in the periodic table.

In calcium phosphate, Ca3(PO4)2, the number of atoms can be calculated by counting the number of moles that is given in the equation.

The number of atoms of calcium is 3, and the number of phosphorus atoms is 2.

Now given the 1.75 mol of calcium phosphate, so the number of atoms of phosphorus will be the same in any number of moles of calcium phosphate. So there will be 2 atoms of phosphorus in the given equation.

Thus, the number of atoms is two.

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Answer:

It is not an oxidation-reduction reaction. The formation of carbon dioxide and water are redox reactions which involve the oxidation of carbon and hydrogen respectively with oxygen being reduced in both the case.

Explanation:

This is not a redox reaction.

A redox reaction is the one that involves reduction and oxidation simultaneously. In a redox reaction, one of the substance gets oxidised and behaves as a reducing agent and the other gets reduced that behaves as an oxidizing agent.

The oxidation or reduction of the substance is decided by the change in oxidation number of the atom which is the charge that an atom appears to have on forming ionic bonds with other heteroatoms.

In this reaction, no change in oxidation state of the atoms takes place and thus this reaction is not a redox reaction.

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Answer:

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.

Explanation:

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Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

From the question we have

[tex]V_2 = \frac{1.23 \times 23}{15} = \frac{28.29}{15} \\ = 1.886[/tex]

We have the final answer as

Hope this helps you

Answer:

C

Explanation:

I would say different points of view and listening to an argument. The local news just to "stay up to date" won't teach you much.

Answer:

b

Explanation:

all of them shows different point of veiws. none of them are biest

Answer: 1849.9584

Explanation:

Answer:

The right response will be "No".

Explanation:

C

Pure water is at 7, and the bases are above 7 and the acids are below 7.

The pH of the solution that is classified as a weak base is 10. Details about weak bases can be found below.

pH of a solution refers to the degree of acidity or alkalinity of that solution.

The pH scale reads from 1 - 14 where the following applies:

A weak base will have a pH close to neutral, therefore, the pH of the solution that is classified as a weak base is 10.

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Answer:

The average atomic mass of copper is 63.55 amu.

Explanation:

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(a) HCL(aq) + NaOH(aq)  ---------------> ___ + ____

The answer will be NaCl and H2O

(b) An equation to show the reaction between hydrogen ions and hydrogen ions and hydroxide ions is given below :

H+   +   OH−   ⇄ H2O

This reaction is known as neutralization reaction.

(c) Joey could tell us the reaction is over only when we obtained salt and water from the given chemical reaction (NaOH + HCl). This a basically a neutralization reaction ( the reaction  generally finished at equilibrium)

(d) pH is 7.

This is because at the ending point the moles of HCl = the moles of NaOH so all that is present is H2O, Cl–, and Na+. So, the pH is 7.

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Answer:

B.       It allows people to rapidly heat items.

Explanation:

because it's a microwave...

Answer:

B. It allows people to rapidly heat items.

I am a bit skeptical about the radiation that allows microwaves to heat items so quickly though...

Explanation:

This is common sense, mate. Sorry to break it to you.

Answer:

I think it's the second answer

Answer:

uhm yes he made her pump go off

Explanation:

Conversion of 34.5  °C to K = C 307.65 K

Temperature is one of the principal quantities that shows the degree of heat or cold from an object / space  

Temperature is used as a guide to the level of heat energy from objects  

Temperature measures thermal energy  

The temperature conversion :

°F = (9/5) °C + 32

°R = (4/5) °C

°K = °C + 273 .15

34.5 °C into K

[tex]\tt 34.5+273.15=\boxed{\bold{307.65~K}}[/tex]

Answer:

Temperature is one of the principal quantities that shows the degree of heat or cold from an object / space  

Temperature is used as a guide to the level of heat energy from objects  

Temperature measures thermal energy  

The temperature conversion :

°F = (9/5) °C + 32

°R = (4/5) °C

°K = °C + 273 .15

Explanation:

Answer:

7 moles of NaOH will produced.

Explanation:

Given data:

Number of moles of sodium oxide = 3.5 mol

Number of moles of sodium hydroxide produced = ?

Solution:

Chemical equation:

Na₂O + H₂O      →     2NaOH

Now we will compare the moles of sodium oxide with sodium hydroxide.

                 Na₂O            :         NaOH      

                    1                 :             2

                  3.5               :         2/1×3.5 = 7

7 moles of NaOH will produced.

Answer:

Nonmetals are further to the right on the periodic table, and have high ionization energies and high electron affinities, so they gain electrons relatively easily, and lose them with difficulty.

Explanation:

They also have a larger number of valence electrons, and are already close to having a complete octet of eight electrons.

Periodic table is divided as metals, non metals, noble gases and semiconductors. Among these nonmetals tend to have high electron affinities because of small size and high effective nuclear charge.

Non metals are the element that have property to gain electron. When any element gain electron then element attain negative charge and that element is called anion.

As we go from left to right in periodic table, the size of element decreases as number of electrons keep on adding electrons in the same shell . As the number of electrons increases, the number of proton in the nucleus also increases. Due to this, the hold of nucleus on the outermost proton increases and the size decreases. Due to this, the ionization energy increases and hence the power to gain electron increases.

Therefore, nonmetals tend to have high electron affinities because of small size and high effective nuclear charge.

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Answer:

Carbon + Oxygen = Carbon Dioxide

Explanation:

You already did

Cu⇒ 1 atom

N⇒2 atoms

O⇒6 atoms

Total 9 atoms

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula  

Chemical formula : Cu(NO₃)₂

Number of Cu : 1

Number of N : 2

Number of O = 2 x 3 = 6

Total atoms in Cu(NO₃)₂ : 1 + 2 + 6 = 9

Answer: For a gas to become a liquid, large numbers of particles must clump together. Particles will clump together when the attraction between them overcomes their motion. For this to happen, energy must be removed from the gas to slow the particles down. So, condensation is an exothermic change.

Answer:

polar zone - the part of the Earth's surface forming a cap over a pole; characterized by frigid climate. Frigid Zone, polar region. climatic zone - any of the geographical zones loosely divided according to prevailing climate and latitude.

Explanation:

The polar regions, also called the frigid zones, of Earth are the regions of the planet that surround its geographical poles, lying within the polar circles.

Answer:

liquid

Explanation:

liquids can change shape based on what container they are in but they have a definite volume

Answer:

Liquid

Explanation:

The pressure of the gas : 1.1685 atm

In general, the gas equation can be written  

[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

n=moles=1.5

V=volumes = 30 L

T=temperature=285 K

The pressure :

[tex]\tt P=\dfrac{nRT}{V}\\\\n=\dfrac{1.5\times 0.082\times 285}{30}\\\\P=1.1685~atm[/tex]