0.2 moles of aluminum has a mass of 5.4 g. what is The molar mass of aluminum​

Answer:

A: element B

B: element A

C: element B

D: element A

Explanation:

decrease in size leads increase in electronegativity because the smaller the size, the closer the shell is to the nucleus. Also, atomic radius decreases to the right and up on the periodic table. Atomic radius increases to the left and down a period. I hope this helps!

5.2 mol H₂O

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Stoichiometry

Step 1: Define

[RxN - Balanced] 6HCl + Fe₂O₃ → 2FeCl₃ + 3H₂O

[Given] 10.4 mol HCl

Step 2: Identify Conversions

[RxN] 6 mol HCl = 3 mol H₂O

Step 3: Stoichiometry

Answer:

Okay, Left top= waning gibbous

left second= new moon

left third= third quarter

left fourth= waxing crescent

right top= Waning crescent

right second= first quarter

right third= full moon

right fourth= Waxing gibbous

hope you do good :)

Answer:

first one waining gibbious

secound one waining crecent

third one new moon

fourth one first quarter

fithe one third quarter

sixth one  full moon

sevnth one waxing crecent

eithe one waxing gibbious

Explanation:

Answer:

4.00L

Explanation:

Using Charle's law, which have the following equation:

V1/T1 = V2/T2

Where;

V1 = initial volume (litres)

T1 = initial temperature (Kelvin)

V2 = final volume (litres)

T2 = final temperature (Kelvin)

According to the information provided, T1 = 275K, T2 = 400K, V1 = ?, V2 = 5.82L

Hence, using the formula;

V1/275 = 5.82/400

400 × V1 = 275 × 5.82

400V1 = 1600.5

V1 = 1600.5 ÷ 400

V1 = 4.001

Therefore, volume of the gas before it is heated is 4.00L

Answer:

photosynthesis

Explanation:

that's the way plants feed themselves

Answer:

photosynthesis

Explanation:

I hope i helped

Answer:

6.944 liters of O₂ at STP will react with 8.7 grams of C₂H₄ to form CO₂ and H₂O.

Explanation:

The balanced reaction is:

C₂H₄ + 3 O₂ ⇒ 2 CO₂ + 2 H₂O

Being the molar mass of the elements:

Then the molar mass of compound C₂H₄ is:

C₂H₄= 2*12 g/mole + 4*1 g/mole= 28 g/mole

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), 1 mole of C₂H₄ acts. Then, being the mass of a mole of a substance, which can be an element or a compound, 1 mole of C₂H₄ is 28 g, which is the amount of mass that reacts in this case.

Then be able to apply the following rule of three: if by stoichiometry 28 grams of C₂H₄ react with 3 moles of O₂, 8.7 grams of C₂H₄ with how many moles of O₂ do they react?

[tex]moles of O_{2} =\frac{8.7 grams ofC_{2} H_{4}*3 moles of O_{2} }{28grams ofC_{2} H_{4}}[/tex]

moles of O₂= 0.31  

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

Then we can apply the following rule of three: if by definition of STP 1 mole occupies 22.4 L, 0.31 moles how much volume will it occupy?

[tex]volume=\frac{0.31 moles*22.4 L}{1 mole}[/tex]

volume= 6.944 L

6.944 liters of O₂ at STP will react with 8.7 grams of C₂H₄ to form CO₂ and H₂O.

The volume of O₂ at STP that will react with the given C₂H₄ is 20.8 L

First, we will determine the number of moles of O₂ required.

From the given balanced chemical equation,

C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

This means

1 mole of C₂H₄ is required to react completely with 3 moles of O₂

Now, we will determine the number of moles of C₂H₄ present

Mass of C₂H₄ = 8.7 g

Using the formula

[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]

Molar mass of C₂H₄ = 28.05 g/mol

∴ Number of moles of C₂H₄ = [tex]\frac{8.7}{28.05}[/tex]

Number of moles of C₂H₄ = 0.31016 mole

Since

1 mole of C₂H₄ is required to react completely with 3 moles of O₂

Then,

0.31016 mole of C₂H₄ will react completely with 3 × 0.31016 mole of O₂

3 × 0.31016 = 0.9305 mole

∴ Number of moles of O₂ required is 0.9305 mole

Now, for the volume of O₂ at STP that will react

Since 1 mole of a gas occupies 22.4 L at STP

Then,

0.9305 mole of O₂ will occupy 0.9305 × 22.4 L at STP

0.9305 × 22.4 = 20.8432 L

≅ 20.8 L

Hence, the volume of O₂ at STP that will react with the given C₂H₄ is 20.8 L

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Answer:

Elements

Explanation:

Atomic number is a property of elements

Answer:

I think that volumic mass is like weight of an object, or like the space it takes up??

Explanation:

Have A Wonderful Day !!

Answer:

3.39 x 10²³ particles

6.02 x 10²²particles

Explanation:

The problem here entails we find the number of particles in the given substances.

From the mole concept;

          1 mole of a substance contains 6.02 x 10²³ particles

a. 18g of O₂;

 We first find the number of moles of this substance first;

       Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  Molar mass of O₂   = 2(16) = 32g/mol

      Number of moles  = [tex]\frac{18}{32}[/tex]   = 0.56mole

 So;

             1 mole of a substance contains 6.02 x 10²³ particles

            0.56 mole of  O₂ will contain 0.56 x 6.02 x 10²³ particles

                                                                   = 3.39 x 10²³ particles

b. 0.1mole of calcium atom:

        1 mole of a substance contains 6.02 x 10²³ particles

       0.1 mole of the substance will contain 0.1 x  6.02 x 10²³ particles

                                                                         = 6.02 x 10²²particles

Answer:

there are 12 hydrogen atoms in 2 molecules of C3H6

Explanation:

Answer:

fgedhwkmgfvhcdnxj

Explanation:

gtryijdohuygfvbhgfy

Answer:

a) high pressure

that is the answer i got, but wait for a few more answers before you write the answer

Answer:

Ethanol has a higher octane number than gasoline, providing premium blending properties, according to the U.S.

Explanation:

Department of Energy. Minimum octane number requirements prevent engine knocking and maintain drivability.

Answer:

The coefficient is 2

Explanation:

count the Number of hydrogen and oxygen elements on both sides. They should be equal.

Answer:

I'm pretty sure its c

Explanation:

The atomic mass of hydrogen, which is 1.008 amu, is not a whole number because hydrogen has more than one isotope.

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Explanation:

moles=mass÷molar mass

n=m÷Mr

6.0=14.6÷Mr

Mr=14.6÷6.0

Molar mass= 2.433

Answer:

53.49146

Explanation:

Answer:

After about 6 to 8 hours, the white flowers begins to develop red spots near the edge of the petals.

When the stems were cut, coloured water was observed along the length of the stem.

Explanation:

In the experiment, red ink was placed in the beaker of water and a red-coloured water was obtained. Then the tender twig of a flowery plant (e.g. carnation) with leaves and white flowers was placed in the beaker. After about 6 to 8 hours, the white flowers began to develop red spots near the edge of the petals. When the stems were cut, coloured water was observed along the length of the stem. The observations in this experiment is due to the fact that the stem conducted the water and the ink through the xylem up to the leaves. On getting to the leaves, the water evaporates from the leaves in a process known as transpiration leaving behind the red ink. This ink then appears as the red spots on the leaves.

The process of transpiration in the leaves results in the continuous conduction of water from the stem to leaves, and hence, the appearance of more coloured spots with time.

Answer:

Percent composition is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound. This value is presented as a percentage.

Explanation:

Answer:

0.4 km/h  velocity is also the direction their going, in this case the person, that I'll name billy bob joe, is going in so yeh

Explanation:

give me brainliest?

Answer:

Check the electronegativities of the atoms involved in each bond. The greatest difference in electronegativity will correspond to the most polar bond.

Answer:

Often, chemical changes in the water might result in the release of different minerals such as salt or calcium carbonate. Pressure and heat in the process of creating metamorphic rock can also result in the formation or transformation of minerals.  Minerals in igneous rocks often form where magma has cooled over time.

Explanation:

Minerals only form in certain areas due to presence of specific environment.

Minerals only form in certain areas because of the presence of suitable environmental condition for it. Every mineral needs specific environment for its formation. Without that specific temperature, pressure and some other factors, the mineral can't formed.

Every mineral needs specific environment for its formation which is different from one another so we can conclude that mineral formation needs particular environmental conditions.

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Answer:

3.81 [tex]\frac{1}{74.55}[/tex] X [tex]\frac{6.02*10^{23} }{1}[/tex] = 3.08 X 10^22

Explanation:

74.55 is the mass

Answer:

63.6%

Explanation:

The given compound is:

     N₂O;

The problem here is to find the percent composition of nitrogen in the compound.

First find the molar mass of the compound:

 Molar mass of N₂O = 2(14) + 16  = 44g/mol

So;

 Percentage composition of Nitrogen  = [tex]\frac{2 x 14}{44}[/tex]  x 100  = 63.6%

Answer:

It would be Container 3

Explanation:

Each of the containers has the same amount of salt.  Salinity refers to salt level.  Since the question is asking for the container with the greatest salinity, you are looking for the container with the least water (because it will be the saltiest out of all of them).  Container 3 has the least water.

Hope this helps :)

3 has less water so its saltier

Answer:

sample 2

Explanation:

hope this helps

Answer:

In both natural and built systems, stability and change are an important focus of study for both scientists and engineers. Stability refers to a system that is unchanging. ... A dynamic equilibrium exists when chemical reactions or physical movements occur at rates that balance out, creating no net change in a system.

Answer:

In both natural and built systems, stability and change are an important focus of study for both scientists and engineers. Stability refers to a system that is unchanging. ... A dynamic equilibrium exists when chemical reactions or physical movements occur at rates that balance out, creating no net change in a system.

Explanation: