54.0 g Al reacts with 64.0 g O2 to
form Al2O3 according to the equation.
4A1+30₂ → 2Al2O3
Al: 26.98 g/mol Al2O3: 101.96 g/mol
How many grams of Al2O3 form
from 54.0 g Al?
[?] g Al₂O3

The domain remain unaffected by the magnet is the right answer.

Both the north poles and the south poles of the domains point toward the magnet so the domains is unaffected by the magnet as the nail approaches to the south pole of a magnet.

So we can conclude that the domain remain unaffected by the magnet is the right answer.

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Answer. The domain remain unaffected by the magnet

Answer:

Sink

Explanation:

For a substance to float in water, it must be less dense than water. The density of water is 1 g/cm^3. To find the density of the substance, we can do mass/volume, which in this case is 25g/7cm^3. We see that [tex]25/7 > 1[/tex], so the substance would sink.

Answer:

6) 47588

4.7 * 10 power 4 ( by rounding off)

7) 1 mm ---> 1,000,000

? 120

120 * 1 / 1000000

12/ 100000

0.0012

1.2 * 10 power -4.

8) Volume is the amount of space something occupies

Answer:

1.42 M

Explanation:

First calculate the amount of moles.

that's done by dividing the mass with the molecular mass so 660g / 310.18 g/mol = 2.13 mol

Then you can calculate the molarity by dividing the moles with the volume so 2.13 mol / 1.5 l = 1.42 M

(without rounding: 1.418531175 M)

Answer:

1.42 M

Explanation:

Acellus

Answer:

0.0496

Explanation:

Well, there’s none!!! It’s just so easy…

Answer: 49.6

Explanation: It actually wants the answer it mL not L.

Answer: 0.118M

Explanation:

The formula for molarity is: [tex]M=\frac{mol solute}{L solution}[/tex]

First, we need to find the number of moles of NaCl.

[tex]2.70gNaCl*\frac{1molNaCl}{58.44gNaCl} =0.05molNaCl[/tex]

Next, we must convert millimeters to liters. We can do that by dividing the number of mL by 1000.

[tex]\frac{425mL}{1000} =0.425L[/tex]

Now we have our needed data! All we need to do now is plug in our data to the molarity formula.

[tex]M=\frac{0.05mol}{0.425L} =0.118M[/tex]

I hope this helps! Pls mark brainliest!! :)

Answer: C. A substance that results when two or more substances combine physically but not chemically

the percent yield of the reaction is 100%.

The percent yield is calculated as the experimental yield divided by the theoretical yield x 100%:

% yield = actual yield / theoretical yield * 100%

% yield of a reaction in this case Rate

In this case, the molar mass of NaBr is 102.9 g / mol, as you know:

444 actual yield = 7.08 mol x 102.9 g / mol = 728.532 g

theoretical yield = 7.08 mol x 102.9 g / mol = 728.532 g

, Replaced by the definition of percent yield:

percent yield = 728.532 grams / 728.532 grams * 100%

percent yield = 100%

Finally, the percent yield of the reaction is 100%.

FeBr3 is iron bromide. Also known as iron bromide. Iron bromide is an ionic compound in which iron is in a +3 oxidation state.

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Answer: 87%

Explanation:

Answer:

27 gm

Explanation:

Well..... the volume of the copper is   3 cm^3

9.0  g/cm^3    * 3 cm^3 = 27 gm

Answer:

temporary changes are the changes which are there only for a short period if time generally temporary changes are reversible permanent changes are the changes which remain to for longer time and are not reversible

Explanation:

hope it is helpful for

Any Change in the amount of an inert gas into a gas-phase equilibrium at constant volume does not result in a shift of the equilibrium of a chemical system. This follows the equilibrium law.

According to this principle, Adding an inert gas into a gas-phase equilibrium at constant volume does not result in a shift.

This is because the addition of a non-reactive gas does not change the partial pressures of the other gases in the container.

While the total pressure of the system increases, the total pressure does not have any effect on the equilibrium constant.

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Answer:

i believe c. reversible

Explanation:

oxygen combines with hemoglobin and detaches

Answer:

c

Explanation:

same answer i got from quiz

Answer:

V₂ = 4.80 L

Explanation:

Because you are dealing solely with pressure and volume, you can find the new volume using the Boyle's Law equation. The general equation looks like this:

P₁V₁ = P₂V₂

In this form, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the new pressure and volume. You have been given all of the variables but V₂. Therefore, by plugging these values into the equation, you can simplify to find your answer.

P₁ = 602 torr              V₁ = 24.0 L

P₂ = 3010 torr            V₂ = ?

P₁V₁ = P₂V₂                                               <---- Boyle's Law equation

(602 torr)(24.0L) = (3010 torr)V₂             <---- Plug variables into equation

144448 = (3010 torr)V₂                            <---- Multiply 602 and 24.0

4.80 = V₂                                                 <---- Divide both sides by 3010

Answer:

C.) 76.1 grams

Explanation:

To find the mass of bromine, you need to (1) convert grams AlCl₃ to moles AlCl₃ (via molar mass), then (2) convert moles AlCl₃ to moles Br₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Br₂ to grams Br₂ (via molar mass). It is important to arrange your ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).

Molar Mass (AlCl₃): 26.982 g/mol + 3(35.453 g/mol)

Molar Mass (AlCl₃): 133.332 g/mol

2 AlCl₃ + 3 Br₂ --> 2 AlBr₃ + 3 Cl₂

Molar Mass (Br₂): 2(79.904 g/mol)

Molar Mass (Br₂): 159.808 g/mol

42.3 g AlCl₃          1 mole               3 moles Br₂           159.808 g
------------------  x  -----------------  x  ----------------------  x  -------------------  =
                            133.332 g         2 moles AlCl₃            1 mole

=  76.0 g Br₂

*Our answers are slightly different most likely because we used slightly different molar masses*

The mass of solute will dissolve in 100g of water at the following temperatures will be  153 gms, 40 gms, 70gms simultaneously.

On increasing temperature the amount of solute for dissolution decreases.

It is independent of the nature of solute.

Hence,

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Answer:

25.55 g

Explanation:

To find the total mass of both objects, you need to add the masses together.

22.45 g + 3.1 g = 25.55 g

In correct significant figures (2 sig figs to match 3.1 g), the value would be 26 g.

Answer:

answer = 25.55

Explanation:

You just have to add the mass of the two objects

Answer:A is correct

Explanation:

The identity of the noble gas is the sample is Krypton

From the question, we are to determine the identity of the noble gas in the sample

From the ideal gas equation, we have that

PV = nRT

∴ n = PV / RT

Where P is the pressure

V is the volume

n is the number of moles

R is the gas constant

and T is the temperature

From the given information,

P = 678 mmHg = 0.892105 atm

V = 363 mL = 0.363 L

R = 0.08206 L.atm/mol.K

T = 35 °C = 35 + 273.15 K = 308.15 K

Putting the parameters into the equation, we get

n = (0.892105 × 0.363)/ (0.08206 × 308.15)

n = 0.0128 moles

Now, we will determine the Atomic mass of the sample

Using the formula,

Atomic = Mass / Number of moles

Atomic mass of the substance = 1.07 / 0.0128

Atomic mass of the substance = 83.6 amu

The noble gas with the closest atomic mass to this value is Krypton.

Molar mass of Krypton = 83.798 amu

Hence, the identity of the noble gas is the sample is Krypton

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Answer

I think there should be two poles, a north pole and a south pole. so this statement is wrong

Answer:

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.

Explanation:

Answer:

Catalyst

Explanation:

The theoretical yield of the product is 204 g of the product .

The theoretical yield is the yield of the reaction as obtained from the stoichiometry of the reaction.  

The reaction equation is given as 4Al + 3O2 → 2Al2O3

Number of moles of Al = 54.0 g/27 g/mol = 2 moles

Number of moles of oxygen = 64.0 g/32 g/mol = 2 moles of O2

Hence,

If 4 moles of Al yields 2 moles of Al2O3 then 204 g of the product is obtained.

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Answer: 102

Explanation:

Answer:

6.)

7.)  134.4 g O₂

Explanation:

The unbalanced equation:

NH₃ (g) + O₂ (g) ---> N₂ (g) + H₂O (g) + energy

Reactants: 1 nitrogen, 3 hydrogen, 2 oxygen

Products: 2 nitrogen, 2 hydrogen, 1 oxygen

The balanced equation:

4 NH₃ (g) + 3 O₂ (g) ---> 2 N₂ (g) + 6 H₂O (g) + energy

Reactants: 4 nitrogen, 12 hydrogen, 6 oxygen

Products: 4 nitrogen, 12 hydrogen, 6 oxygen

To convert from moles to grams, you need to multiply the starting value (4.2 moles) by the molar mass (32.00 g/mol). The molar mass can serve as a conversion because it technically means there are 32.00 grams O₂ per every 1 mole. It is important to arrange this ratio in a way that allows for the cancellation of units (the desired unit should be in the numerator).

4.2 moles O₂          32.00 g
--------------------  x  ----------------  =  134.4 g O₂
                                1 mole

Answer:

will you help us with that one please

Answer:

Option A

A pure chemical substance consisting of one type of atom.

Explanation: An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.

An element is defined as  a pure chemical substance consisting of one type of atom.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.There are 118 elements known to exist either naturally or artificially.

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the formula: MCl₂

name of the product formed: chloride salt + hydrogen

Answer:

yes so for example one

Explanation:

yeah so

Based on the calculations, the number of Si atoms in one unit cell is equal to 8 atoms/unit cell.

Mathematically, the volume of a unit cell can be calculated by using this formula:

V = a³

V = (543)³ × (1 × 10⁻¹²)³ × (100)³

Volume, V = 1.60 × 10⁻²² cm³.

Next, we would determine the mass:

Mass = density × volume

Mass = 2.33 × 1.60 × 10⁻²²

Mass = 3.73 × 10⁻²² grams.

Also, we would determine the mass of one silicon atom:

Mass = 28.09/(6.022 × 10²³)

Mass = 4.665 × 10⁻²³ g/atom.

Now, we can calculate the number of Si atoms in one unit cell:

Number = 3.73 × 10⁻²²/4.665 × 10⁻²³

Number = 8 atoms/unit cell.

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