Methanol can be formed by the following UNBALANCED equation
below. What is the mass in grams of methanol that can be formed
from 885 molecules of CO?
H2(g) + CO(g) → CH3OH(1)

Answer:

study island

proof

Explanation:

Fossilized marine creatures found at the top of the Himalayan Mountains provide evidence for a scientific theory of plate tectonics. Therefore, option (D) is correct.

Plate tectonics can be explained as the Earth's lithosphere being made of a large number of tectonic plates that have been slowly moving since about 3.4 billion years ago.

The lithosphere is broken into 7 or 8 major plates and many minor plates or "platelets". These plates meet, and their relative motion evaluates the kind of plate boundary: convergent, transform, or divergent.

Mountain-building, Earthquakes, volcanic activity, and oceanic trench formation take place along these plate boundaries. The relative annual movement of the plates ranges from 0 to 10 cm.

Tectonic plates are comprised of the oceanic and the thicker continental lithosphere. The process of subduction which is actually one plate moving under another carries the edge of the lower plate down into the mantle along convergent boundaries.

Pebbles, Shells, and marine fossils found in the limestone beds of the tallest Himalayas Mountains give evidence of the theory of plate tectonics.

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Answer

0.0972

Explanation

Given:

Mass of calcium oxide = 5.45 grams

What to find:

The number of moles for the mass.

Step-by-step solution:

The number of moles in 5.45 grams CaO can be calculated using the mole formula.

From the periodic table, the molar mass of CaO = (40.078 + 15.999) = 56.077 g/mol

Therefore,

The number of moles for the mass of 5.45 grams CaO = moles

another name for a maggot is a worm

Answer:

5.6 grams

Explanation:

In order to find letter A, we need to calculate all this information using this calorimetry formula:

Q = mcΔT

Where:

Q = heat absorbed or released

m = mass

c = specific heat

ΔT = variation in temperature

Now placing the values of our question in the formula:

Q = 263g * (4.184J/g°C) * (24.40 - 23)

Q = 1540.54J

Q = 1.54 kJ

Now in letter B we need to use the

ΔH = Q/n

Where:

ΔH = enthalpy of the reaction

Q = the heat

n = number of moles

We need to find the number of moles first, we know that the molar mass is 64.6g/mol and we have 37.8g, therefore:

64.6g = 1 mol

37.8g = x moles

x = 0.58 moles of X

Now our equation:

ΔH = 1.54/0.58 moles

ΔH = 2.65 kJ/mol

Answer:

Fractional distillation is a method for separating liquids with different boiling points. For example, liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation. ... The boiling point of ethanol is 78°C and the boiling point of water is 100°C.

250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

Answer: 0.943 M of potassium hydroxide solution is required.

Explanation:

A neutralization reaction is defined as the reaction in which an acid reacts with a base to form a salt and water molecule.

To calculate the molarity of potassium hydroxide, the equation used is:

\(n_1M_1V_1=n_2M_2V_2\)              ........(1)

where,

\(n_1, M_1\text{ and }V_1\) are the n-factor, molarity and volume of acid that is \(H_2SO_4\)

\(n_2, M_2\text{ and }V_2\) are the n-factor, molarity and volume of the base that is KOH

We are given:

\(n_1=2\\M_1=0.506M\\V_1=23.3mL\\n_2=1\\M_2=?M\\V_2=25.0mL\)

Putting values in equation 1, we get:

\(2\times 0.506\times 23.3=1\times M_2\times 25.0\\\\M_2=\frac{2\times 0.506\times 23.3}{1\times 25.0}\\\\M_2=0.943M\)

Hence, 0.943 M of potassium hydroxide solution is required.

Answer:23.9 g

Explanation:

Grams C = (12/6.02214076)*12 = 23.9 g

There are 23.9 grams of carbon are in \(12*10^{23}\) atoms of carbon.

As we know that, atomic mass of carbon is 12.

It means that, In one mole of carbon , 12 grams of carbon is present.

    1 mole \(=6.022*10^{23} atoms\)

In \(6.022*10^{23}\) atoms of carbon, 12 grams of carbon is present.

So,  In \(12*10^{23}\) atoms of carbon,

                                 \(=\frac{12}{6.022*10^{23} }*6*10^{23}\\\\=23.9 grams\)

There are 23.9 grams of carbon are in \(12*10^{23}\) atoms of carbon.

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Answer:

a) water expands when it freezes and damages the cell wall.

Explanation:

We know that most liquids expand when heated and contract when cooled. Water does not behave in the same way.

Water contracts on cooling from any temperature until 4°C when it begins to expand until 0°C. Hence a given mass of water has its least volume and highest density at 4°C.

Hence, fresh vegetables with high water content do not freeze well because water expands when it freezes and damages the cell wall.

The frequency (in hertz) of the x-ray having a wavelength of 4.73×10⁻¹⁴ hectometers is 6.34×10¹⁹ Hertz

Frequency is defined as the number of complete oscillations made in 1 second.

However, the frequency of a wave is related to wavelength according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

With the above formula, we can determine the frequency of the x-ray. Details below:

Velocity (v) = wavelength (λ) × frequency (f)

3×10⁸ = 4.73×10⁻¹² × frequency

Divide both sides by 4.73×10⁻¹²

Frequency = 3×10⁸ / 4.73×10⁻¹²

Frequency = 6.34×10¹⁹ Hertz

Thus, we can conclude, the frequency is 6.34×10¹⁹ Hertz

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Answer:

hope this helps

Explanation:

see pictures try to put them in order

Answer:

10 L

Explanation:

We'll begin by calculating the number of mole in 9 g and 1 g of He. This can be obtained as follow:

Mass of He = 9 g

Molar mass of he= 4 g/mol

Mole of He =?

Mole = mass /Molar mass

Mole of He = 9/4

Mole of He = 2.25 moles

Mass of He = 1 g

Molar mass of he= 4 g/mol

Mole of He =?

Mole = mass /Molar mass

Mole of He = 1/4

Mole of He = 0.25 moles

Finally, we shall determine the new volume of the balloon as follow:

Initial mole (n₁) = 0.25 mole

Initial volume (V₁) = 1 L

Final mole (n₂) = 0.25 + 2.25 = 2.5 moles

Final volume (V₂) =?

V₁/n₁ = V₂/n₂

1 / 0.25 = V₂ / 2.5

4 = V₂ / 2.5

Cross multiply

V₂ = 4 × 2.5

V₂ = 10 L

Therefore, the new volume of the balloon is 10 L

HCN is a linear molecule with C in the midle. C has 4 linking bonds, Nitrogen has 3 and Hydorgen 1 the structure threfore is:

The pressure of the gas using the ideal gas equation is 14.93 atm.

The pressure of the gas using the van der Waals equation is 3.82 atm.

The pressure of the gas using the ideal gas equation is calculated as follows;

PV = nRT

where;

P = nRT/V

P = (3.9 x 0.08205 x 294)/(6.3)

P = 14.93 atm

P = (RT/Vm - b) - a/Vm²

P = (0.08205 x 294) / (6.3 - 0.03183) - (1.36)/(6.3²)

P = 3.85 - 0.034

P = 3.82 atm

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the possible quantum numbers (ordered n, ℓ, mℓ ) are:Option B.5, 3, -3 and Option C. 4, 3, -2

The quantum numbers n, ℓ, mℓ represent respectively the principal quantum number, the orbital angular momentum quantum number and the magnetic quantum number.

These are the three most important quantum numbers. T

here is another quantum number called the spin quantum number, denoted by ms.

Let's see which of the given quantum number sets is possible.2, 1, 3 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. 5, 3, -3 is possible.4, 3, -2 is possible. -4, 3, 1 is not possible.

For any value of ℓ, mℓ must be between -ℓ and +ℓ. e. 2, 1, -2 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. f. 3, 2, 2 is not possible because for ℓ = 2, mℓ can only be -2, -1, 0, +1, or +2. g. 3, 3, 1 is not possible because for any value of ℓ, mℓ must be between -ℓ and +ℓ.

Therefore, the possible quantum numbers (ordered n, ℓ, mℓ ) are:5, 3, -34, 3, -2

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Answer:

1. To calculate the number of moles of Cl- ion given, we need to first calculate the total number of Cl- ions in 1250 mL of Ringer's solution:

1250 mL x (109 mEq/L / 1000 mL/L) = 136.25 mEq of Cl-

Next, we can convert mEq to moles using the molecular weight of Cl-:

136.25 mEq x (1 mol / 1000 mEq) = 0.13625 mol of Cl-

Therefore, 0.13625 moles of Cl- ion were given.

2. To calculate the volume of 10% NaOH solution containing 2.2 g of NaOH, we need to use the definition of percent concentration:

10 g NaOH / 100 mL solution = 2.2 g NaOH / x mL solution

Solving for x, we get:

x = (2.2 g NaOH) / (10 g NaOH / 100 mL) = 22 mL

Therefore, 22 mL of 10% NaOH solution would contain 2.2 g of NaOH.

3. To calculate the number of moles of BaCl2 in 600 mL of a 2.5 M solution, we can use the definition of molarity:

2.5 mol/L = x mol / 0.6 L

Solving for x, we get:

x = 1.5 mol of BaCl2

Therefore, 1.5 moles of BaCl2 are in 600 mL of a 2.5 M solution.

4. To calculate the molarity of a solution of 29.2 g of NaCl in 134 mL of solution, we need to first convert the mass of NaCl to moles:

29.2 g NaCl x (1 mol / 58.44 g) = 0.499 mol NaCl

Next, we can calculate the volume of the solution in liters:

134 mL x (1 L / 1000 mL) = 0.134 L

Finally, we can calculate the molarity:

0.499 mol / 0.134 L = 3.72 M

Therefore, the molarity of the solution is 3.72 M.

5. To calculate the mass of Na2CO3 needed to prepare a 400 mL of 3.00 M solution of Na2CO3, we can use the molarity formula:

Molarity = moles of solute / liters of solution

Rearranging the formula to solve for moles of solute:

moles of solute = Molarity x liters of solution

moles of Na2CO3 = 3.00 M x 0.400 L = 1.20 moles of Na2CO3

Next, we can convert moles of Na2CO3 to grams using the molar mass of Na2CO3:

1.20 moles Na2CO3 x (105.99 g / 1 mole) = 127.2 g of Na2CO3

Therefore, 127.2 grams of Na2CO3 are needed to prepare a 400 mL of 3.00 M solution of Na2CO3.

6. To calculate the molarity of NaNO3 solution made by diluting 33.0 ml of a 5.50 M solution to a final volume of 250. mL, we can use the dilution 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.

Rearranging the formula to solve for M2:

M2 = M1V1 / V2

M2 = (5.50 M) x (33.0 mL) / (250. mL)

M2 = 0.726 M

Therefore, the molarity of NaNO3 solution made by diluting 33.0 ml of a 5.50 M solution to a final volume of 250. mL is 0.726 M.

7. To calculate the grams of mannitol given in one hour, we can use the definition of percent concentration:

20 g mannitol / 100 mL solution = x g mannitol / 100 mL solution

Simplifying the equation, we get:

x = 20 g mannitol

Therefore, 20 g of mannitol are given in 100 mL of solution. Since the patient receives 100 mL of solution every hour, the amount of mannitol given in one hour is also 20 g.

8. To calculate the microliters of a 4000.0 ppm Fe stock solution

Given that:

The first step is to determine the vapor pressure at the final temperature of 251K by using the Clausius-Clapeyron equation. This is following by using the ideal gas equation to determine the numbers of moles of butane gas. After that, the mass of butane present in the liquid is determined by using the relation for the number of moles.

Using Clausius-Clapeyron Equation:

\(\mathbf{In (\dfrac{P_2}{P_1} )= -\dfrac{\Delta H_{vap}}{R}(\dfrac{1}{T_2} - \dfrac{1}{T_1})}\)

where;

P1 and P2 correspond to the temperature at T1 and T2.

∴

replacing the values into the given equation, we have;

\(\mathbf{In \dfrac{P_2}{1\ atm} = -\dfrac{22440 \ J/mol}{8.314 \ J/mol.K}(\dfrac{1}{251 \ K} - \dfrac{1}{272.6 \ K})}\)

\(\mathbf{In \dfrac{P_2}{1\ atm} =-(0.852053785)}\)

\(\mathbf{P_2=0.427 \ atm}\)

As such, at -22° C; the vapor pressure = 0.427 atm

Now, using the ideal gas equation:

PV = nRT

where:

∴

Making (n) the subject of the formula:

\(\mathbf{n = \dfrac{PV}{RT}}\)

\(\mathbf{n = \dfrac{0.427 atm \times 0.250 L}{(0.08206 \ L.atm/k.mol) \times 251}}\)

\(\mathbf{n =0.00518 mol}\)

We all know that the standard molecular weight of butane = 58.12 g/mol

∴

Using the relation for the number of moles which is:

\(\mathbf{number \ of \ moles = \dfrac{mass}{molar mass}}\)

mass = 0.00518 mole × 58.12 g/mol

mass = 0.301 g

∴

The mass of butane in the flask = 0.301 g

But the mass of the butane present as a liquid in the flask is

= 0.8 g - 0.301 g

= 0.499 g

In conclusion, the mass of the butane present as a liquid in the flask is 0.499 g

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Answer:

An airplane

Explanation:

An airplane because of its position .

Explanation:

Hi! I don't know why I am not getting any brainliest answer and if you are kind enough could you please mark me as the brainliest answer and please follow me also.

Answer:

NaOH

Explanation:

An unknown solution has a pH of 6.8. The chemical that will increase the pH is NaOH. The correct option is a.

Acids have lower pH, and they are sour and bases have high pH, and they are bitter in taste.

HCl, NH3, HNO3 are all acids and acid decrease the pH. Only NaOH is a base, and it will increase the pH.

Thus, the correct option is a. NaOH.

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Explanation:

The electron density number as well as the sublevel letter are used to describe valence electrons in an atom. The third total energy and subbasement p, for example, is denoted by 3p. The electron configuration of oxygen, for example, is 1s^2 2s^2 2p^4, which means the first two electrons will couple up in the 1s orbital, while the following two protons will pair up in the 2s orbital.

The sample atom is Carbon with electron configuration; 1s² 2s² 2p².

The principal energy level of an electron refers to the shellp in which the electron is located relative to the atom's nucleus. In this case only 2 energy levels exist in a carbon atom; which are energy level 1 and 2

The sublevels exist within a principal energy and the electron configuration of an atom is described with consideration of energy sublevels. The sublevels in a carbon atom are;

The orbitals in this configuration are: 1s 2s 2px 2py 2pz in which case; each orbital can accommodate 2 electrons each.

Ultimately, the location of an element on the periodic table with respect to group and period are used to determine the valency and no. of energy levels in the atom of that Element.

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The organic product formed in the reaction shown in the image would be bromoethane.

Alkanes, such as ethane undergoes a substitution reaction with halogens such as bromine to produce haloethanes.

For example, the equation of the reaction between ethane and bromine water is as below:

\(C_2H_6 + Br_2 --- > C_2H_5Br + HBr\)

The products formed are bromoethane and hydrobromic acid.

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The element fluorine is more electronegative than the element chlorine. Fluorine has an electronegativity value of 4.0 and Carbon has an electronegativity value of 2.5.

The term electronegativity is defined as a chemical property that describes the capacity of an atom or a functional group to attract electrons toward itself.

Electronegativity is refer to the ability of an atom to attract shared electrons in a covalent bond. The grater the value of the electronegativity, the more strongly that element attracts the shared electrons.

In fluorine electronegativity value is more than carbon. Therefore, it strongly attracts the shared electrons.

Thus, The element fluorine is more electronegative than the element chlorine.

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Answer:

will you help us with that one please

The masses of dimethylamine and dimethylammonium chloride we need to prepare 8. 00 l of pH = 12. 00 buffer is 905 gm.

A buffer solution is defined as an acid or a base aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa whose pH changes very little when a small amount of a strong acid or base is added to it.

For above given information, the dimethylamine (CH₃)₂NH and dimethylammonium chloride (CH₃)₂NH * HCl are mixed to prepare a buffer solution

The concentration of the components is given as 0.5M , Volume = 5L

No. of moles = CV = 0.5 * 5 =2.5 moles

2.5 moles of dimethylamine = mass/ Molecular weight

Molecular weight of dimethylamine = 45 gm

Therefore the mass of dimethylamine required = 45 * 2.5 = 112.5gm

4 moles of dimethylammonium chloride = 362 gm

Therefore the mass of dimethylammonium chloride required = 362*2.5 = 905 gm

Thus, the masses of dimethylamine and dimethylammonium chloride we need to prepare 8. 00 l of pH = 12. 00 buffer is 905 gm.

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Answer:

measured

Explanation:

no way can they pin point exactly when something lived when its in the millions

The Voltage is the pressure from the electrical circuit of the power source that passes the current.

The Voltage is defined as the pressure from the electrical circuit of the power source that will passes the charged electrons that is the current through the conducting loop, it will enable them to do work  because of the illuminating the light. The in simple terms is : voltage = pressure, and it is denoted as the volts and the symbol is the V.

The voltage is described as the force that causes the flow of the charged particles. The Voltage is also called as the electromotive force.

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Answer: two solutions mixed in a beaker produce a solid

Explanation: it formed a new substance

Answer:

the pressure in The air increase