what is the difference between base alkali and acid in chemistry?

Answer: 2 moles

Explanation:

AM of Al 27

Answer:

the metal is gold I'd say

The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex]grams.

The metal atom is palladium.

Explanation:

Given:

A face-centered unit cell.

The density of the unit cell is [tex]12020 kg/m^3[/tex].

The edge length of the unit cell 389.08 pm

To find:

The mass of one atom of the metal

Solution:

The density of the unit cell = d = [tex]12020 kg/m^3[/tex]

The edge length of the unit cell = a = 389.08 pm

[tex]1 pm = 10^{-12} m\\a=389.08 pm=389.08\times 10^{-12} m=3.8908\times 10^{-10}m[/tex]

Total number of atoms in F.C.C unit cell = z = 4

The atomic mass of the metal atom = M

The density of the unit cell is given by:

[tex]d=\frac{z\times M}{N_A\times a^3}\\12020 kg/m^3=\frac{4\times M}{6.022\times 10^{23}mol^{-1}\times (3.8908\times 10^{-10}m)^3}\\M=0.106586 kg/mol\\1 kg=1000 g\\M=0.106586 kg/mol=0.106586 \times 1000 g/mol\\M=106.586 g/mol[/tex]

The mass of one mole of metal atom = 106.586 g

The mass of 1 atom of metal :

[tex]=\frac{106.586 g}{6.022\times 10^{23}}\\=1.770\times 10^{-22} g[/tex]

The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex] grams.

The atomic mass of the metal atom is 106.586 g/mol which is close to the atomic mass of the palladium. Hence, the metal atom is palladium.

Learn more about the density of unit cell here:

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Answer:

EF = CH₂

Explanation:

The empirical formula of any compound would be the most simplified and simple chemical formula of a compound. To get this number, we need to get the data of how many moles of each atom of the compoud we have.

Analyzing the data, we just know that an unknown compound undergoes a combustion reaction and produces CO₂ and H₂O. As the compound only have Carbon and hydrogen, it's pretty easy to get the moles of each atom.

To get the moles of CO₂, we need the molar mass of CO₂, which is 44 g/mol, then the moles:

nCO₂ = 2.28 / 44 = 0.0518 moles of CO₂.

Now that we have the moles of CO₂, we can get the moles of Carbon. Since 1 mole of CO₂ is made of 1 mole of Carbon and 2 moles of oxygen, this means that we have 0.0518 moles of C.

Applying the same thing with the water, we have:

nH₂O = 0.702 / 18 = 0.039 moles of water

And 1 mole of water is made of 1 mole of oxygen and two moles of hydrogens, then the moles of Hydrogen are 0.078 moles.

With these moles, we can now calculate the empirical formula.

C = 0.0518 / 0.0518 = 1

H = 0.078 / 0.0518 = 1.51 ≅ 2

Now these two numbers, give us the number of atoms, in the empirical formula so:

Of course there is no compound that have only those number of atom, but remember that this is the empirical formula, so, it's a simplified or reduced formula of the molecular formula, which means that the real or whole molecular formula could have more atoms of C and H, but to know this, we need the molar weight of this compound, and the problem does not give this data.

Hope this helps

Answer:

1. c 2. b that's what i think i learned this in middle school i dont completely remember

Answer:

[tex]\boxed {\boxed {\sf \rho= 0.1 \ g/cm^3 }}[/tex]

Explanation:

Density is found by dividing the mass by the volume.

[tex]\rho=\frac{m}{v}[/tex]

The mass is 50 grams, but we have to find the volume.

Assuming this is a solid rectangular object, we can use this formula for volume:

[tex]v=l*w*h[/tex]

The length is 25 centimeters, the width is 10 centimeters, and the height is 2 centimeters.

[tex]v= 25 \ cm * 10 \ cm * 2 \ cm[/tex]

[tex]v= 250 \ cm^2 * 2 \ cm[/tex]

[tex]v= 500 \ cm^3[/tex]

Now we know the mass and volume:

[tex]m= 50 \ g\\v= 500 \ cm^3[/tex]

Substitute the values into the formula.

[tex]\rho = \frac{50 \ g}{500 \ cm^3}[/tex]

[tex]\rho= 0.1 \ g/cm^3[/tex]

The density of the object is 0.1 grams per cubic centimeter.

Answer:

See Explanation

Explanation:

The question is incomplete; as the mixtures are not given.

However, I'll give a general explanation on how to go about it and I'll also give an example.

The percentage of a component in a mixture is calculated as:

[tex]\%C_E = \frac{E}{T} * 100\%[/tex]

Where

E = Amount of element/component

T = Amount of all elements/components

Take for instance:

In [tex](Ca(OH)_2)[/tex]

The amount of all elements is: (i.e formula mass of [tex](Ca(OH)_2)[/tex])

[tex]T = 1 * Ca + 2 * H + 2 * O[/tex]

[tex]T = 1 * 40 + 2 * 1 + 2 * 16[/tex]

[tex]T = 74[/tex]

The amount of calcium is: (i.e formula mass of calcium)

[tex]E = 1 * Ca[/tex]

[tex]E = 1 * 40[/tex]

[tex]E = 40[/tex]

So, the percentage component of calcium is:

[tex]\%C_E = \frac{E}{T} * 100\%[/tex]

[tex]\%C_E = \frac{40}{74} * 100\%[/tex]

[tex]\%C_E = \frac{4000}{74}\%[/tex]

[tex]\%C_E = 54.05\%[/tex]

The amount of hydrogen is:

[tex]E = 2 * H[/tex]

[tex]E = 2 * 1[/tex]

[tex]E = 2[/tex]

So, the percentage component of hydrogen is:

[tex]\%C_E = \frac{E}{T} * 100\%[/tex]

[tex]\%C_E = \frac{2}{74} * 100\%[/tex]

[tex]\%C_E = \frac{200}{74}\%[/tex]

[tex]\%C_E = 2.70\%[/tex]

Similarly, for oxygen:

The amount of oxygen is:

[tex]E = 2 * O[/tex]

[tex]E = 2 * 16[/tex]

[tex]E = 32[/tex]

So, the percentage component of oxygen is:

[tex]\%C_E = \frac{E}{T} * 100\%[/tex]

[tex]\%C_E = \frac{32}{74} * 100\%[/tex]

[tex]\%C_E = \frac{3200}{74}\%[/tex]

[tex]\%C_E = 43.24\%[/tex]

Answer:

going without without masks is like to play with a dirty things which is very undesired and unwanted .corona virus is very serious world wide epidemic which is surrounded in all region due to our carelessness many lives are taken due to our carelessness. so please wear mask and maintain social distance to fight against all types of communicable diseases. I hope please be rational and aware.

Answer:

Hola porfa ayudame si podes

Answer:

26.34 moles

Explanation:

Answer:

is also

Explanation:

if iron is a mineral then a nail is a mineral to

Lakes dry up. Shortage of water. Decrease in humidity.

Answer:

Fission and fusion are two physical processes that produce massive amounts of energy from atoms. They yield millions of times more energy than other sources through nuclear reactions.

Explanation:

Hope this answer your question.

Answer:

it is synthesis reaction

Answer:

See explanation

Explanation:

Now , we have the equation of the reaction as;

2H2S(g) + 302(g)------->2SO2(g) + 2H2O(g)

This equation shows that SO2 gas is produced in the process. Let us recall that this same SO2 gas is the anhydride of H2SO4. This means that it can dissolve in water to form H2SO4

So, when SO2 dissolve in rain droplets, then H2SO4 is formed thereby lowering the pH of rain water. This is acid rain.

Answer:

Your ability to move and lift objects refers to muscular strength. It's measured by how much force you can exert for a short period of time and how much weight you can lift.

Explanation:

Given :

Number of He atoms, [tex]n = 3.4\times 10^{24}[/tex] atoms.

To Find :

How many grams are their in given number of He atoms.

Solution :

We know, molecular mass of He is 4 g. It means that their are [tex]6.022 \times 10^{23}[/tex] atoms in 4 g of He.

Let, number of gram He in [tex]3.4\times 10^{24}[/tex] atoms is x , so :

[tex]x = \dfrac{3.4\times 10^{24}}{6.022\times 10^{23}}\times 4\\\\x = $$22.58\ g[/tex]

Therefore, grams of He atoms is 22.58 g .

Answer:

it is a combustion reaction

Answer:

Combustion (and synthesis)

Explanation:

Edge 2021

Answer:

please write the question correctly or upload the image of the problem

Answer:

Biology, Chemistry, Geology, Astronomy, physics, Zoology

Answer:

1. biology- the study of living things

2. astronomy- the study of space

3. chemistry- the study of composition, properties and energy change of matter

4. geology- the study of solid earth like rocks

5. ecology- the study of relationship between living things and their environment

6.physics- the study of the structure of matter and the interactions between the fundamental constituents of the observable universe.

Answer:

a

Explanation:

a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

Answer:

A digram show mixture

Because mixture is formed by simple mixing of many substances

And figure A shows different substances

Explanation:

Answer:

3,1,1 would work

Explanation:

Answer:

The boiling point

Explanation:

The boiling point is the temperature where a liquid starts to boil.

Answer:

the boiling point.

Explanation:

Answer:

Hydrogen is the most explosive element

Answer:

1.evaperation

2.condenstation

3.precipatation

Explanation:

So I guess condenstation leads to precipatation-

Answer:

Evaporation is when water/liquids changes state from a liquid to a gas. Which eventually with enough water water vapor (which is what forms when water evaporates), it turns into clouds. But when the clouds get too heavy and full of water. Rain/precipitation falls from those clouds.

-Hope this helps!

Explanation:

The new volume : V₂ = 1185.9 cm³

Given

V₁ = 571 cm³

T₁ = 260 K

T₂ = 540 K

Required

The new volume (V₂)

Solution

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

Input the value :

V₂ = V₁.T₂/T₁

V₂ = 571 x 540 / 260

V₂ = 1185.9 cm³

Answer:

V₁ = 571 cm³

T₁ = 260 K

T₂ = 540 K your right

Explanation:

The new volume will by 1185.9

Answer:

D) A positive but not linear relationship

Explanation:

This comes from the equation Ek=1/2mv^2

Where Ek is Kinetic Energy, m is mass, and v is the speed (or velocity).

As we can see in the equation, the relation is not linear but quadratic and it is positive.

Answer:

D) A positive but not linear relationship

Explanation:

Speed is equal to distance divided by time. ... Therefore, the kinetic energy of an object is proportional to the square of its velocity (speed). In other words, If there is a twofold increase in speed, the kinetic energy will increase by a factor of four.

Answer:

Mitochondria is known as the powerhouse of the cell as it provides teh energy required for the cell to carry out cellular respiration and cellular process that maintain the cell

Answer:

the awnser is reactants