march 10
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Answer:

C. as both liquids and solids

Explanation:

The ionic compounds are  good conductors of electricity when they exist as both liquids and solids.

Ionic compound or electrovalent compound is a type of compound  which is formed between two elements when there is an exchange of electrons which takes place between  the atoms resulting in the formation of ions.

When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge  and forms an ion called the anion.

As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.They are good conductors of electricity of heat, They are hard and brittle and even used as electrolytes.

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The proton number has the highest value in the ion

In an atomic element Q, the mass number is the number of the proton and the neutron, the electron encircles around the nucleus of the atomic element.

Recall that:

∴

The atomic element Q+ has a positively charged ion, Thus, the proton number in the mass of the atomic element Q, therefore, has the highest value in the ion.

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Answer:

Percentage yield of MgCl₂ = 83.4%

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Mg + 2HCl —> MgCl₂ + H₂

Next we shall determine the mass of of Mg that reacted and the mass of MgCl₂ produced from the balanced equation. This can be obtained as follow:

Molar mass of Mg = 24 g/mol

Mass of Mg from the balanced equation = 1 × 24 = 24 g

Molar mass of MgCl₂ = 24 + (35.5×2)

= 24 + 71

= 95 g/mol

Mass of MgCl₂ from the balanced equation = 1 × 95 = 95 g

SUMMARY:

From the balanced equation above,

24 g of Mg reacted to produce 95 g of MgCl₂.

Next, we shall determine the theoretical yield of MgCl₂. This can be obtained as follow:

From the balanced equation above,

24 g of Mg reacted to produce 95 g of MgCl₂.

Therefore, 100 g of Mg will react to produce = (100 × 95)/24 = 395.83 g of MgCl₂.

Thus, the theoretical yield of MgCl₂ is 395.83 g

Finally, we shall determine the percentage yield of MgCl₂. This can be obtained as follow:

Actual yield of MgCl₂ = 330 g

Theoretical yield of MgCl₂ = 395.83 g

Percentage yield of MgCl₂ =?

Percentage yield = Actual yield /Theoretical yield × 100

Percentage yield = 330 / 395.83 × 100

Percentage yield of MgCl₂ = 83.4%

Answer:

It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs.

Explanation:

Answer:

Explanation:

The muscle that is contracted, it allows the lungs to fill with air through diaphragm muscle.

Hope it helped you.

Answer:

The relationship between carbon-14 and nitrogen is that carbon-14 forms from nitrogen atoms and eventual decays into atoms of nitrogen-14.

Explanation:

The relationship between carbon-14 and nitrogen is that carbon-14 forms from nitrogen atoms and eventual decays into atoms of nitrogen-14.

Since carbon-14 contains an unstable nucleus that decays radioactively over time, it is a radioactive isotope of carbon. The atomic nucleus of this substance, which goes by the symbol "C-14," consists of six protons and eight neutrons. On Earth, carbon-12 (C-12), an atom with six protons and six neutrons, makes up the vast bulk of the carbon.

In the high atmosphere of the planet, a nuclear process known as cosmic ray spallation produces carbon-14. High-energy cosmic rays hit with nitrogen-14 (N-14) atoms in the atmosphere, with the majority of these collisions coming from the Sun and other space-based sources.

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Answer:

N=5.47×10^23

Explanation:

n=

[tex]n = \frac{m }{ar} [/tex]

N=n×la

Answer:

8CO + 17H2 = C8H18 + 8H2O

8, 17, 1, 8

Answer:

The volume of 8.625 g of sulphur dioxide at RTP is approximately 3,230.84 cm³

Explanation:

The question requires the determination of the volume occupied by the gas based on the molar volume of a gas at STP

The given parameters of the sulphur dioxide, SO₂, gas are;

The mass of the given SO₂ gas = 8.625 g

The molar mass of SO₂ = 64.07 g/mol

The number of moles, 'n', in the given sample of SO₂ gas = Mass of SO₂/(Molar Mass of SO₂)

∴ The number of moles of SO₂ in the gas sample = 8.625 g/(64.07 g/mol) ≈ 0.134618386 moles

The molar volume of a gas at RTP is approximately 24 dm³/mole

24 dm³ = 24,000 cm³

∴ The molar volume of a gas at RTP is approximately 24,000 cm³/mole

The volume occupied by a gas at RTP = (The number of moles of the gas) × (The Molar Volume of a gas at RTP)

∴ The volume occupied by the 8.625 g of SO₂ gas at RTP = 0.134618386 moles × 24,000 cm³/mole ≈ 3,230.84 cm³

The volume occupied by the 8.625 g of SO₂ gas at RTP ≈ 3,230.84 cm³.

Answer: The balanced molecular equation is:

[tex]K_2(C_2O_4)(aq)+CaCl_2(aq)\rightarrow 2KCl(aq)+Ca(C_2O_4)(s)[/tex]

The ionic equation is:

[tex]2K^+(aq)+C_2O_4^{2-}(aq)+Ca^{2+}(aq)+2Cl^-\rightarrow 2K^+(aq)+2Cl^-(aq)+Ca(C_2O_4)(s)[/tex]  

The net ionic equation:

[tex]C_2O_4^{2-}(aq)+Ca^{2+}(aq)\rightarrow Ca(C_2O_4)(s)[/tex]

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The balanced molecular equation is:

[tex]K_2(C_2O_4)(aq)+CaCl_2(aq)\rightarrow 2KCl(aq)+Ca(C_2O_4)(s)[/tex]

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The ionic equation is:

[tex]2K^+(aq)+C_2O_4^{2-}(aq)+Ca^{2+}(aq)+2Cl^-(aq)\rightarrow 2K^+(aq)+2Cl^-(aq)+Ca(C_2O_4)(s)[/tex]

The ions which are present on both the sides of the equation are potassium and chloride ions. and hence are not involved in net ionic equation.

The net ionic equation:

[tex]C_2O_4^{2-}(aq)+Ca^{2+}(aq)\rightarrow Ca(C_2O_4)(s)[/tex]

Answer:

air pressure is the air around you  that ahs weight and it presses everytime you touch , wind speeds is the amount of wind formedin weather

Explanation:

Answer: The greater the difference in pressure, the faster the winds. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure

Explanation: Hope this helps :)

7 hydrogen atoms

NH4C2H302

In this problem we see the hydrogen atom twice, along with the numbers 4 and 3 next to them. (as shown above in bold & underlined)

So, in order to find how many there are in all you add both hydrogen atoms together-

H4+H3= H7

therefore, there are 7 hydrogen atoms in all

Answer:

The rain containing excess of acid I called acid rain

Answer:

acid rain

Explanation:

Thats literally what its called

Answer:

Explanation:

ok, so heat energy is a result to moving particles which are atoms  molecules or ions in solids,liquids and gasses. And heat energy can be moved from an object to a other object. The transfer or the flow is different in temperature between the two different of objects which is called heat.

Hope this is useful!

Answer:

1.50x10^21 molecules O2

Explanation:

5.00 mol O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

3.01 × 10²⁴ atoms O₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

4.99834 mol O₂ ≈ 5.00 mol O₂

Answer:

B. X= Elements, Y= Compounds

Explanation:

An element is a substance that is made up of only one type of atom. The atoms of an element can combine together chemically to form a molecule but can still exist as an individual atom e.g. Hydrogen atom; H can form molecule H2. Since only one atom makes up an element, its electrons act independently.

Compounds, on the other hand, are substances that are made up of more than one type of atom chemically combined. A compound can only exist as a molecule because it always contains more than one atom bonded together. However, since more than one atom are involved in the chemical bond that holds them together, electrons are shared with other atoms. Example of a compound is H20 containing atoms of hydrogen and oxygen that are chemically combined.

Answer:

D. in a covalent bound,electronics are shared.In ionic bounds

electrons are transfered

Explanation:

:) Hope this helps!!

A rumor spread faster in a classroom where students are confined to desks than in a gym where all of the students can move around freely.

The same applies to conductivity between metals and ionic solids because metals have more close particles.

Conductivity is the process by which a material is able to transfer electric charge or heat from one point to another without the actual movement of the particles of the substance.

The conductivity of substances varies from one substance to another.

The conductivity of solids is greater than the conductivity of that of other substances.

The conductivity of substances increases with a decrease in the distance between the particles of the substance.

Thus solids that have the closest particles have the highest conductivity.

Liquids have medium conductivity.

Gases have the least conductivity because they have the most spaced-out particles.

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Answer:

what are you supposed to answer???

Explanation:

Answer:

Uranium, Zinc, titanium, Gold, Copper , silver and more

Explanation:

Answer:

answer this and ill answer that

Explanation:

during a heating or cooling process, how are changes in enthalpy and temperature related?​

Answer:

its a body or assembly of popular elected represenatives

Explanation:

which the purpose of this is to form a representative democracy

hope this helps

Answer:

2.52 g of water

Explanation:

Recall that;

1 mole of water contains 6.02  * 10^23 molecules of water

x moles of water contains 8.16 * 10^22 molecules of water

x = 8.16 * 10^22 * 1/ 6.02  * 10^23

x = 1.4 * 10^-1 = 0.14 moles of water

Then;

1 mole of water = 18 g of water

0.14 moles of water = 0.14 * 18 /1 = 2.52 g of water

Answer:Yes

Explanation:  Matter is everything around you.

Answer:

It would be B

Explanation:

Answer:

Limiting: Lab covers. Books produced: 75. Excess amounts: In explanation

Explanation:

Amount that can be produced with just lab covers: 75 books (150/2)

Amount that can be produced with just lined paper: 150 books (7500/50)

Amount that can be produced with graph paper: 120 (3000/25)

Amount that can be produced with staples: Approximately 83 (250/3)

As we can see, the lab covers are limiting as they can only produce 75 books. So, we can only make 75 books.

You will have 3,750 lined paper left over (or 75 books)

(150-75=75 , 75*50=3,750)

You will have 1,125 graph paper left over (or 45 books)

(120-75=45 , 75*25=1,875 , 3000-1875=1125)

And then you will have approximately 25 staples left over (or 8 books)

(83-75=8 , 8*3=225, 250-225=25)

(Hopefully this is correct, I apologize if I messed up)

Answer: b

Explanation: 50% comes from one parent and 50% comes from the other

Answer:

metals, nonmetals and metalloids

Explanation: