How many liters of air must react with 2500 mL of hexane in order for combustion to occur completely. The percentage of oxygen in air is 20.9%.

Answer:

5m

Explanation:

Given parameters:

Speed of wave  = 3 x 10⁸m/s

Frequency  = 60mhz  = 60 x 10⁶Hz

Unknown:

wavelength = ?

Solution:

To solve this problem;

 we use the expression:

                      V = F ∧  

V is the velocity

F is the frequency

∧ is the wavelength

  Now insert the parameters and solve;

              3 x 10⁸   = 60 x 10⁶ x ∧  

 So;

        ∧   = 5m

Answer:

That it's really hard to remember and it's filled with elements

Explanation:

Given that,

Temperature, T = 1500 K

Wavelength, [tex]\lambda=4.5\times 10^2\ nm[/tex]

To find,

The energy of one photon of this light.

Solution,

We know that, the energy of a photon is given by the formula as follows :

[tex]E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{4.5\times 10^2\times 10^{-9}}\\\\=4.42\times 10^{-19}\ J[/tex]

So, the required energy is [tex]4.42\times 10^{-19}\ J[/tex].

Answer:

a) Number of moles = 0.41 mol

b) Number of moles = 0.44 mol

c) Number of moles = 0.47 mol

Explanation:

a)

Given data:

Mass of copper sulfate = 65.5 g

Number of moles = ?

Solution:

Number of moles = mass/molar mass

Molar mass of copper sulfate = 159.6 g/mol

Number of moles = 65.5 g/ 159.6 g/mol

Number of moles = 0.41 mol

b)

Given data:

Mass of magnesium nitrate  = 65.5 g

Number of moles = ?

Solution:

Number of moles = mass/molar mass

Molar mass of magnesium nitrate = 148.3 g/mol

Number of moles = 65.5 g/148.3g/mol

Number of moles = 0.44 mol

c)

Given data:

Mass of potassium carbonate  = 65.5 g

Number of moles = ?

Solution:

Number of moles = mass/molar mass

Molar mass of potassium carbonate = 138.2 g/mol

Number of moles = 65.5 g/138.2g/mol

Number of moles = 0.47 mol

Answer:

density=mass/volume

Explanation:

density is defined as mass per unit volume.

Answer:

your question is totally wrong. there is no cl2 in reactants.

Answer:

You can change an object's state of matter by adding or removing thermal energy. When you add thermal energy to an object, these things can happen: Particles move faster

Explanation:

Answer:

2 C6H6  + 15 O2  (  12 CO2  + 6 H2O

Explanation:

6.156 L is the volume of a gas at 800.0 mm Hg and 40.0 °C if its volume at 720.0 mm Hg and 15 °C is 6.84 L.

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

[tex]P_1V_1=P_2V_2[/tex]

[tex]P_1[/tex] = 800.0 mm Hg

[tex]V_1[/tex] = ?

[tex]P_2[/tex] = 720.0 mm Hg

[tex]V_2[/tex] = 6.84 L

Putting all the value in the equation;

[tex]P_1V_1=P_2V_2[/tex]

800.0 mm Hg X [tex]V_1[/tex] = 720.0 mm Hg X 6.84 L

[tex]V_1[/tex] =6.156 L

6.156 L is the volume of a gas at 800.0 mm Hg and 40.0 °C if its volume at 720.0 mm Hg and 15 °C is 6.84 L.

Learn more about an ideal gas equation here:

https://brainly.com/question/9360986

#SPJ2

Answer:

Option C: Combustion and synthesis only

Explanation:

This reaction is referred to as combustion reaction because carbon is burnt in oxygen to produce carbon (IV) oxide.

Also, it's a synthesis reaction because the two different atoms which are Carbon and oxygen interact to form a different compound which is CO2.

Thus, the correct answer is Option C: combustion and synthesis only

Answer: 1024 sodium ions

Explanation: The mathematical equation, N = n × NA, can be used to find the number of atoms, ions or molecules in any amount (in moles) of atoms, ions or molecules: 10 moles of helium atoms = 10 × (6.022 × 1023) = 6.022 × 1024 helium atoms. 10 moles of sodium ions = 10 × (6.022 × 1023) = 6.022 × 1024 sodium ions. (that took long)

Overall, an atom is neutral charged. The Bohr model was for years accepted as the final authority because it agrees so well with experiment and observation. In this model an atom consists of a nucleus containing protons and neutrons. The neutrons are zero charge so we can forget them in looking for charges. For each proton (1 positive charge) there is always 1 electron (1 negative charge) in orbit around the nucleus. thus an atom has a equal number of electrons and protons and their net charge is zero.

We can do things to temporarily up set this natural balance (we call this electricity) but the atoms will eventually return to their naturally balanced state

Answer:

In 2 grams of NaCl are 116,88 mols

Explanation:

One mol of NaCl (6.02 x1023 formulas) has a mass of 58.44 g.

Calculation: 58,44g X 2 = 116,88

Answer:

Carbon

Explanation:

i took this asdf asdf asdf sadf as faasdfasdf

asd

f asdfas

df

asdf

Answer:

Fe, or the iron atom

Explanation:

The subscripts designate the number of atoms in the molecule. If there is no subscript, it is understood to be 1.

Answer:

964ug

Explanation:

The problem here involves converting from one unit to another.

 We are to convert from ounces to micrograms.

                                    1ug  = 1 x 10⁻⁶g

                                    1oz  = 28.35g

So we first convert to grams from oz then take to ug:

 Solving:

                    1oz  = 28.35g

             3.4 x 10⁻⁵oz  will then give  3.4 x 10⁻⁵ x 28.35 = 9.64  x 10⁻⁴g

So;

                    1 x 10⁻⁶g    = 1ug

          9.64  x 10⁻⁴g will give [tex]\frac{9.64 x 10^{-4} }{1 x 10^{-6} }[/tex]      = 9.64 x 10²ug or 964ug

Answer:

98.8

Explanation:

CsF + XeF6 --> CsXeF7

37.8g ................. ?g

37.8g CsF x (1 mol CsF / 151.9g CsF) x (1 mol CsXeF7 / 1 mol CsF) x (397.2g CsXeF7 / 1 mol CsXeF7) = 98.8g CsXeF7 .......... to three significant digits

Answer:

28.0

Explanation:

Answer:

what is the question

Explanation:

Answer:

COMPOUND

Explanation:

I THINK

Answer:

The correct answer is - control rods.

Explanation:

Control rods are filled with special absorbing agents such as boron, cadmium, silver, and others to absorb as many neutrons as to control the fission reaction by moving them up and down in between uranium rods.

These control rods are used to prevent the nuclear reaction from getting out of control in the nuclear plant or reactor by absorbing the neutrons and prevent uranium to convert.

Answer:

¹⁴₇N

Explanation:

⁴₆C → ¹⁴₇N + ⁰₋₁e

The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.

Beta radiations:

Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.

The mass of beta particle is smaller than the alpha particles.

They can travel in air in few meter distance.

These radiations can penetrate into the human skin.

The sheet of aluminum is used to block the beta radiation

Answer:

Yes

Explanation:

Atoms are generally classified as pure substances. A pure substance has the following properties:

Elements and compounds are generally classified as pure substances. Since atoms are the building blocks of pure substances, they can be classified as one.

Answer:

Average atomic mass  = 10.8  amu

Explanation:

Given data:

Average atomic mass = ?

Percentage of boron having mass 10.0129371 amu = 19.9%

Percentage of boron having mass 11.0093055 amu = 80.1%

Solution:

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass  = (19.9×10.0129371 )+(80.1×11.0093055) /100

Average atomic mass =  199.3 + 881.8 / 100

Average atomic mass = 1081.1  / 100

Average atomic mass  = 10.8  amu.

Answer:

well, it made volcanos grow larger and it developed land

Explanation:

Gases and solids injected into the stratosphere circled the globe for three weeks. Volcanic eruptions of this magnitude can impact global climate, reducing the amount of solar radiation reaching the Earth's surface, lowering temperatures in the troposphere, and changing atmospheric circulation patterns.

Answer:

mars

Explanation:

Answer:

25

Explanation:

mass number = protons + neutrons

= 13 + 12 = 25

Answer: D sand and water

Explanation:

Since water is less dense than sand it could be easily separated if you go to the ocean that’s why the water is at the bottom of the sand but on above the sand so it will be able to separate easily.

Answer:

Answer: D sand and water

Explanation:

Answer:

I belive it is B