A double replacement reaction is a reaction in which one element replaces a similar element within a compound.

True
False

Answer:

A covalent bond will hold them together.

Explanation:

The two bromine atoms will share electrons to build a stronger bond and have a full valence outer shell (which makes them stable).

Hope this helps!

Answer:

c

Explanation:

did  on edge 2k24

Answer:

Explanation:

The equation that you have to complete is:

This is, you have to find the products formed and the coefficients in front of each substance to balance the chemical equation.

Carbon may react with oxygen using oxidation number 2 or 4.

If carbon uses oxidation number 2, the chemical equation is:

If carbon uses oxidation number 4, the chemical equation is:

Normally, an incomplete combustion yields to a mixture of products: both CO and CO₂, and it only happens when the amount of oxygen is limitied.

When there is plenty of oxygen available, the combustion is complete and the only product of the reaction is CO₂.

With that information, and the fact that the list of choices do not include CO as product, you conclude that this is a complete combustion, and the chemical equation is:

So, the choice that completes the chemical equation is CO₂.

Answer:

2 M.

Explanation:

I mole of NaCl reacts with 1 mole of HCl ( from the equation).

2 Liters of 5 molar contains 2 * 5 =  10 moles of NaCl so this will neutralise 10 moles of HCl.

So  the concentration of 5 liters of HCl must be 10/5 = 2M.

Answer:

2 M

Explanation:

If it takes 2.0 L of 5.0 M NaOH to neutralize 5.0 of an HCl solution, the concentration of the HCI is 2 M.

2 Liters of 5 molars = 2 x 5 =  10 moles

Answer:

A base.

Explanation:

Basic solutions give OH- ions.

The average mass of an atom is calculated with the formula:

average mass = abundance of isotope (1) × mass of isotope (1) + abundance of isotope (2) × mass of isotope (2) + ...  an so on

For the boron we have two isotopes, so the formula will become:

average mass of boron = abundance of isotope (1) × mass of isotope (1) + abundance of isotope (2) × mass of isotope (2)

We plug in the values:

10.81 = 0.1980 × 10.012938  + 0.8020 × mass of isotope (2)

10.81 = 1.98 + 0.8020 × mass of isotope (2)

10.81 - 1.98 = 0.8020 × mass of isotope (2)

8.83 = 0.8020 × mass of isotope (2)

mass of isotope (2) = 8.83 / 0.8020

mass of isotope (2) = 11.009975

mass of isotope (1) = 10.012938 (given by the question)

Answer:

1 is B

Explanation:

Ice is crystalline so when water drops below freezing it forms crystals, I don't know the rest.

Answer:

1. D

2. C

3. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density. More organized in the solid forms verse the liquid form.

Explanation:

1. When temperatures drop below freezing crystals are formed, and crystals = ice. Ice = solid and there are more bonds in ice than there are in water.

2. When ice forms the hydrogen atoms in a water molecule bond with the oxygen atoms in other water molecules.

Final answer:

Dark matter and dark energy are termed 'dark' because they do not emit, absorb, or reflect light, which makes them invisible to traditional detection methods such as telescopes; they are detectable only through their gravitational effects.

Explanation:

Dark matter and dark energy are described as "dark" not because they emit blackbody radiation, absorb light, or are merely found in shadows, but because they are difficult to detect by conventional means. The correct answer is D. Because we cannot easily detect them. Dark matter does not emit, absorb, or reflect any light, making it invisible to traditional telescopes that detect electromagnetic radiation. Astronomers infer its existence through the gravitational effects it has on visible objects, such as the rotation curves of galaxies and the gravitational lensing of light from distant objects.

The term "dark" in dark matter and dark energy refers to the fact that these components do not interact with electromagnetic radiation in a way that allows us to detect them directly. Dark matter makes up approximately 80% of the matter in the Universe, and its presence is known primarily through its gravitational influence. Similarly, dark energy is hypothesized to be responsible for the observed acceleration of the expansion of the Universe. However, its nature remains a profound mystery in physics.

Answer:

=67.65 grams of sodium chloride.

Explanation:

In this explanation, we shall assume that the limiting reagent was NaOH only and the amount of HCl used was sufficient.

NaOH + HCl → NaCl + H₂O

In the equation, the ratio of NaOH used to the NaCl produced will be 1:1

The number of moles of NaOH in 46.3 g.

Number of moles = mass/RMM

=46.3g/40g/mol

=1.1575 moles.

Since the reaction ratio is 1:1, the Number of moles of NaCl produced is also 1.1575 moles.

The mass of 1.1575 moles of NaCl is: 1.1575 moles ×  58.443g/mol

=67.65 grams of sodium chloride.

46.3 grams of sodium hydroxide can theoretically produce 67.64 grams of sodium chloride, based on a 1:1 mole ratio and molar masses from the balanced chemical reaction NaOH + HCl → NaCl + H₂O.

To determine how many grams of sodium chloride can be produced from 46.3 grams of sodium hydroxide, we must first write a balanced chemical equation for the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl), which typically produces sodium chloride (NaCl) and water (H₂O):

NaOH + HCl → NaCl + H₂O

This equation shows that one mole of sodium hydroxide reacts with one mole of hydrochloric acid to produce one mole of sodium chloride and one mole of water. The molar masses of these compounds are approximately:

Sodium hydroxide (NaOH): 40.00 g/mol

Sodium chloride (NaCl): 58.44 g/mol

To find the amount of sodium chloride produced from 46.3 g of sodium hydroxide, use the mole ratio from the balanced equation and the molar masses:

Calculate the moles of NaOH: (46.3 g NaOH) / (40.00 g/mol) = 1.1575 mol NaOH

Use the 1:1 mole ratio between NaOH and NaCl to find moles of NaCl: 1.1575 mol NaOH ⇒ 1.1575 mol NaCl

Convert moles of NaCl to grams: (1.1575 mol NaCl) ⇒ (1.1575 mol) ⇒ (58.44 g/mol) = 67.64 g NaCl

Therefore, 46.3 grams of sodium hydroxide can theoretically produce 67.64 grams of sodium chloride.

Answer:

Form a chemical bond between two different substances.

Answer:

15.4 mol CO₂

Explanation:

5.12 mol C₃H₈ × (3 mol CO₂ / mol C₃H₈) ≈ 15.4 mol CO₂

Answer:

15.36 moles of carbon dioxide are produced when 5.12 mol of propane gas is burned in excess oxygen

Explanation:

The Balanced Chemical equation is :

[tex]C_3 H_8 (g) + 5O_2 (g) > 3CO_2 (g) + 4H_2 O(l)[/tex]

Mole ratio of [tex]C_3 H_8:CO_2[/tex] is 1 : 3

That is, 1 mole of propane gas produces 3 moles of carbon dioxide gas.

Using mole ratio we can solve this  

[tex]5.12mol C_3 H_8  \times \frac {(3mol CO_2)}{(1mol C_3 H_8 )}[/tex]

[tex]=15.36 mol CO_2[/tex] is produced.

(Answer)

Please note  :

To convert moles to mass, we multiply by molar mass  

To convert mass to moles, we divide by molar mass

Molar mass is the mass of 1 mole of the substance

For example molar mass of [tex]CO_2[/tex] is

[tex](12.0+2\times16)=44 g/mol[/tex]

(we just add the atomic mass of the atoms to get the molar mass of the substance)

Answer:

The correct answer would be CH2O,

Explanation:

Empirical Formula of any chemical compound gives us the information about the proportion of the element present in the compound but doesn't tell us about the actual numbers or arrangement of atoms.

C6H12O6 is the formula of Glucose. The empirical formula of Glucose is CH2O. This means that there is one atom of Carbon, 2 atoms of Hydrogen and 1 atom of oxygen is present. It tells us about the ratio of the atoms present in the molecules, like empirical formula of CH2O tells us that the ratio of carbon, hydrogen and oxygen is 1:2:1

25.6 L of carbon dioxide gas will be produced when 12.8 L of oxygen gas react with excess carbon monoxide. The stoichiometric ratio for oxygen gas and carbon dioxide gas is 1:2. For every mole of O2 consumed, 2 moles of CO2 are formed.

Further Explanation:

The balanced chemical equation for this reaction is:

O2 + 2 CO → 2 CO2

To get the amount of CO2 produced, the following steps must be followed:

Solving the problem,

STEP 1: Convert liters to moles

[tex]moles \ of \ O_{2} \ = given \ volume \ O_{2} \ (\frac{1 \ mole \ O_{2}}{22.4 \ L} )\\moles \ of \ O_{2} \ = 12.8 \ L \ O_{2} \ (\frac{1 \ mole \ O_{2}}{22.4 \ L} )\\\boxed {moles \ of \ O_{2} \ = 0.57143 \ mol}[/tex]

STEP 2: Get the moles of CO2 formed

[tex]moles \ of\ CO_{2} \ = \ given \ moles \ O_{2} \ (\frac{2 \ mol \ CO_{2}}{1 \ mol \ O_{2}})\\moles \ of\ CO_{2} \ = \ 0.57143 \ mol \ O_{2} \ (\frac{2 \ mol \ CO_{2}}{1 \ mol \ O_{2}})\\\\\boxed {moles \ of\ CO_{2} \ = \ 1.14286 \ mol}[/tex]

STEP 3: Convert moles to liters

[tex]liters \ CO_{2} \ = given \ moles \ CO_{2} \ (\frac{22.4 \ L}{1 \ mol \ CO_{2}})\\liters \ CO_{2} \ = 1.14286 \ mol \ CO_{2} \ (\frac{22.4 \ L}{1 \ mol \ CO_{2}})\\\\\boxed {liters \ CO_{2} \ = 25.6 \ L}[/tex]

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Keywords: stoichiometry, STP, gases

Answer:

25.6 liters of [tex]CO_2[/tex] will be produced.

Explanation:

We are given that 12.8 liters of Oxygen gas is reacted with excess Carbon Monoxide to produce of Carbon Dioxide gas, keeping all the volume measurements at the same temperature.

We are to find the number of liters of Carbon Dioxide used in the reaction.

The equation for this reaction will be:

[tex]2 CO + O_2\implies 2 CO_2[/tex]

From the equation, we can see that the mole ratio of Oxygen to Carbon Dioxide is 1:2. Therefore, the number of liters of [tex]CO_2[/tex] will be double the number of liters of Oxygen.

[tex]12.8 \times 2 = 25.6[/tex]

So, 25.6 liters of [tex]CO_2[/tex] will be produced.

From the provided options, Na (sodium) is the strong reducing agent because it more readily donates its valence electron to reduce other substances.

The element that would be a strong reducing agent from the list provided is Na (sodium). A reducing agent is a substance that donates electrons to another substance in a chemical reaction, thereby reducing the oxidation state of that substance.

The four options given are two halogens, F2 and Cl2, which are strong oxidizing agents rather than reducing agents, and two metals, Ba (barium) and Na.

Between the metals, sodium is more active and thus a stronger reducing agent. This is because sodium is more willing to lose its single valence electron to form the Na+ ion, facilitating the reduction of other substances.

Answer:electrons will be equally attracted to both

Explanation:

e2020

Answer:

Electrons will be equally attracted to both atoms.

Explanation:

Answer:

Yes. Since they have more than the required reactants.

Explanation:

Zinc reduces silver nitrate to silver metal according to the following equation.

2AgNO₃ + Zn → 2Ag + Zn(NO₃)₂

From the equation 2 moles of AgNO₃ produce 2 moles of silver.

If we consider the zinc to be used number of moles=mass/RAM

RAM of zinc =65.38

No. of moles=500/65.38

=7.6476moles

To produce 800 grams of silver they require:

800/107.868 moles=7.4165 moles of silver nitrate since the ratio of silver nitrate to silver produced is 1:1

The number of moles of silver nitrate available=1500/169.872

=8.83 moles.

As the amount of reactants available is more than the required the company will make it in producing the 800 grams of silver required.

Answer:

A.) Yes, there will be extra left over.

Explanation:

Got it correct on founders edtell.

Answer:

evaporation

faster

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Liquid water changes to a gas through boiling; gas particles move faster and have weaker attractions than in the liquid state. This is due to higher kinetic energy overcoming hydrogen bond attractions. Water's unique properties, including ice being less dense than liquid water, are a result of hydrogen bonding.

When liquid water is heated, it will eventually change to a gas through boiling. Gas particles move faster and have weaker attractions between particles than liquid particles. The transition from the liquid phase to the gas phase happens at a substance's boiling point, which is a physical property of the liquid. The process whereby water transforms into gas is closely linked to the kinetic energy of its molecules and the breaking of hydrogen bonds. As water reaches its boiling point and is further heated, the water molecules gain enough energy to break free from the attraction that holds them together in the liquid state, allowing them to escape and spread out as a gas.

The unique properties of water, including its ability to exist as a gas, liquid, and solid, stem from its capacity to form hydrogen bonds. These bonds cause water to behave differently than other substances. For example, unlike most substances, ice (solid water) is less dense than liquid water because the hydrogen bonds cause the molecules to be structured in a way that takes up more space.

Answer:

C its atomic number

Explanation:

Every element has a unique atomic number. The atomic number is always the same for a given element and does not change.

The number of protons in an atom is the atomic number. Protons are located in the nucleus. Being nuclei particles, they do not have a variable number. Their number is fixed and we can easily identify an atom with the number of protons, which is the atomic number.

People on one side of a room can smell air freshener sprayed on the opposite side due to the diffusion of molecules and the increase in entropy. Olfactory receptors in our noses detect these molecules, which allows us to perceive the scent as it spreads throughout the room.

The reason people on one side of a room can smell an air freshener sprayed on the opposite side is due to the diffusion of air freshener molecules from an area of higher concentration to an area of lower concentration. This happens because the entropy of the molecules increases, meaning they spread out to evenly fill the available space, which is why the scent diffuses throughout the room. Since molecules are always in motion, the ones released from the air freshener bottle will move around and mix with air molecules until they are distributed throughout the entire room.

Olfaction, or the sense of smell, allows us to detect these molecules. Humans have many olfactory receptors that can sense a wide range of odors. When molecules from the air freshener reach the receptors in our noses, they bind to them and trigger a signal to the brain, allowing us to perceive the scent. Therefore, although the air freshener is sprayed on one side of the room, the molecules eventually reach and are detected by people on the other side as well.

Answer:

Frogs and toads lose their tails as they develop into adults, but salamanders keep their tails

Explanation:

The salamanders, frogs, and toads are part of the amphibian family. They all live in both water and land. The water is still crucial for their live, despite them being relatively well developed for terrestrial live, with the biggest importance being that their offspring needs it in order to develop. The salamander offspring has only front limbs and tail, thus it can not live on land until it is fully developed, while the frog and toad offspring doesn't have any limbs at the start, only tail, thus not being able to even come out of the water. As they mature, the salamander offspring develops hind limbs as well, while retaining the tail. The frog and toad offspring develops front and back limbs, but its loses its tail.

Answer:

A) Frogs and toads lose their tails as they develop into adults, but salamanders keep their tails

Explanation:

Answer:

C. 2.4 M

Explanation:

Because you started with 12M solution of KCl, that means that there was a concentration of 12 mols of KCl per Liter of solution. (12mol/1L =12 M). Since there was only 0.5L of solution, there was only 6 mols of KCl because there is only 12 mols per 1 Liter, so half of that volume would have half the amount of solute to keep that true. (6mol/.5L = 12 M). With the new water added, the formula becomes (6mols KCl/ 2.5L of water =2.4 M)

After diluting 0.5 L of a 12 M potassium chloride (KCl) solution with 2 L of distilled water, the final concentration will be 2.4 M.So,option C is correct.

The final concentration of potassium chloride (KCl) after dilution, we can use the formula M1V1 = M2V2, where M1 is the initial molarity, V1 is the initial volume, M2 is the final molarity, and V2 is the final volume.

Starting with 0.5 L of a 12 M KCl solution and adding 2 L of distilled water, the final volume (V2) is 0.5 L + 2 L = 2.5 L.

Using the formula, we get:

12 M times 0.5 L = M2 times 2.5 L

So, the final concentration (M2) is:

M2 = (12 M times 0.5 L) / 2.5 L = 2.4 M

Therefore, the final concentration of the KCl solution would be 2.4 M.

Answer:

When we decrease temprature and increase pressure on a gas. It liquifies.

when we increase temprature and decrease pressure on liquid gas. It becomes gas again

HOPE IT HELPS U ....

Answer:

B. when volume and the number of particles are constant

Explanation:

According to Gay Lussac law,

For a given amount of gas at constant volume (V) and the number of particles are constant (n)

Pressure is directly proportional to the temperature of the gas.

It is given by the expression  

[tex]P \propto T[/tex] ( at constant V and n)

[tex]\frac {P}{T} =k[/tex] (k is a constant )

When there is a change in the pressure or temperature

The expression is [tex]\frac {P_1}{T_1} =\frac {P_2}{T_2}[/tex]

Where                                

[tex]P_1[/tex] and [tex]P_2[/tex] are initial pressure and final pressure respectively

[tex]T_1[/tex] and [tex]T_2[/tex] are initial and final temperatures respectivley

Please Note:

Directly proportional means when one increases the other one too will increase that is when pressure increases temperature too will increases if volume and number of particles are constant.

Answer:

Approximately [tex]83\%[/tex].

Explanation:

How many moles of [tex]\mathrm{CO_2}[/tex] gas are released?

The volume of each mole of of an ideal gas is approximately [tex]\rm 24\;L[/tex] under room temperature and pressure (r.t.p, [tex]\rm 20\;^{\circ}C[/tex], [tex]\rm 1\; \right. atm[/tex].) That's the same as [tex]\rm 24,000\;cm^{2}[/tex].

Assume that [tex]\mathrm{CO_2}[/tex] acts like an ideal gas.

[tex]\displaystyle n(\mathrm{CO_2}) = \rm \frac{100\; cm^{3}}{24,000\; cm^{3}} \approx 0.00416667\; mol[/tex].

[tex]\rm HCl[/tex] is in excess. How many moles of [tex]\mathrm{CaCO_3}[/tex] formula units will produce that [tex]\rm 0.00416667\; mol[/tex] of [tex]\mathrm{CO_2}[/tex]?

Consider the ratio between the coefficient of [tex]\mathrm{CaCO_3}[/tex] and that of [tex]\mathrm{CO_2}[/tex].

[tex]\displaystyle \frac{n(\mathrm{CaCO_3})}{n(\mathrm{CO_2})}=1[/tex].

In other words,

[tex]\displaystyle n(\mathrm{CaCO_3})= n(\mathrm{CO_2})\cdot \frac{n(\mathrm{CaCO_3})}{n(\mathrm{CO_2})} = \rm 0.00416667\; mol[/tex].

What's the mass of that many [tex]\mathrm{CaCO_3}[/tex]?

Relative atomic mass data from a modern periodic table:

Formula mass of [tex]\mathrm{CaCO_3}[/tex]:

[tex]M(\mathrm{CaCO_3}) = 40.078+12.011 + 3\times 15.999 =\rm 100.086\; g\cdot mol^{-1}[/tex].

Mass of that [tex]\rm 0.00416667\; mol[/tex] of [tex]\mathrm{CaCO_3}[/tex]:

[tex]m = n \cdot M = \rm 0.00416667 \times 100.086 = 0.417025\; g[/tex].

Percentage mass of [tex]\mathrm{CaCO_3}[/tex] in this sample of chalk:

[tex]\displaystyle \frac{\text{Mass of }\mathrm{CaCO_3}}{\text{Mass of Chalk}} \times 100\%= \rm \frac{0.417025\; g}{0.5\; g} \times 100\%\approx 83\%[/tex].

Answer:

The seasons are caused by the tilt of the Earth's rotational axis away or toward the sun as it travels through its year-long path around the sun

Answer:

Rotation of the Earth.

As the Earth rotates, places on Earth get farther from the Sun and make seasons.

Answer:

=242.47 g of HF

Explanation:

From the equation One mole of SiO₂ (Silicon (IV) Oxide) react with 4 moles of HF (Hydrogen fluoride).

This is because the reaction ratio is 1:4

The number of moles in182 grams of SiO₂ is:

Number of moles= Mass/RMM

RMM of SiO₂ is 60.08 g/mol

No. of moles=182g/60.08g/mol

=3.0293 moles.

The reaction ratio of SiO₂ to HF is 1:4

Thus the number of moles of HF required to react with  3.0293 moles of SiO₂ is:

(4×3.0293)/1= 12.1172 moles

The mass of 12.1172 moles of HF is.

12.1172 moles× RMM of HF

=12.1172 moles×20.01 g/mol

=242.47 g of HF

Answer:

6.44 moles

Explanation:

At STP, 1 mole = 22.4 L

145 L × (1 mole ÷22.4 L) = 6.44 moles

Answer:

a. 1/3

In the picture- D. 4

Explanation:

The product of the gradients of perpendicular lines =-1

m1m2=-1

Given an equation of a line in the form y=mx+c, m is the gradient of the line.

For y= -3x-9, m=-3

m1m2=-1

-3×m2=-1

m2=1/3

The gradient of the perpendicular line is 1/3

For the question in the picture, y=-1/4x-9, m=-1/4

m1×m2=-1

-1/4m2=-1

m2=4

The slope of the line perpendicular to y=-1/4x-9 is 4

Answer:

The correct answer option is D. 4.

Explanation:

We are given that a line is perpendicular to another line with the equation [tex]y=-\frac{1}{4} x-9[/tex]. We are to find the slope of this perpendicular line.

We know that the in the standard equation of a line, [tex]y=mx+c[/tex], m is the slope of the line.

Also, the slope of a line perpendicular to another is the negative reciprocal of that line.

Therefore, the slope of this perpendicular line is 4.

The mass of 1.6 mol of aluminum atom is 43.1712.

What is aluminum atom?

To learn more about aluminum refer to:

https://brainly.com/question/13486066

#SPJ2

Answer:

increasing the number of hydrogen ions.

Explanation:

pH = -log[H⁺].

Answer:

whether their componets are made of elements or compounds

Explanation:

remeber homo means same and hetero mean different.

knowing this you also know that elements would be homogeneous and compounds would be heterogeneous since compunds are made of two or more things

Answer: Option (a) is the correct answer.

Explanation:

A mixture is defined as the substance that contains two or more different number of substances that are physically mixed together.

For example, a mixture of iron nails, sand and water.

A mixture in which solute particles are unevenly distributed into the solvent then it is known as a heterogeneous mixture.

For example, sand in water is a heterogeneous mixture.

A homogeneous mixture is defined as the mixture in which solute particles are evenly distributed in a solvent.

A homogeneous mixture is a clear solution.

For example, salt dissolved in water is a homogeneous mixture.

Thus, we can conclude that mixtures are classified as homogeneous and heterogeneous according to the distribution of their components.