Please help! Urgent!
Given the reaction: 2CH3OH(l) + 3O2(g)—> 2CO2(g) + 4H2O(g) how many liters of O2(g) are needed to produce exactly 200 liters of CO2

Answer:

34.5J

Explanation:

Amount of Heat(Q) = mc∆T

where m (mass of aluminum) = 5.50g

c (specific heat capacity of aluminum) = 0.897J/g°C and ∆T = 95.0°C - 25.0°C = 70.0°C

Q = 5.50x 0.897x 70.0

= 34.5354J = 34.5J

The amount of heat absorbed when 5.50 g of aluminum is heated from 25.0°C to 95.0°C is 34.5 J.

Heat is defined as a form of the energy transmitted from one body to another as a result of a temperature difference.

It can also be defined as the potential energy stored in the bonds that hold the object's particles together.

Heat absorption is defined as absorption of heat without increasing the temperature at the certain point.

Amount of heat = mcΔT

Where m = 5.50g

           c = 0.897 J/g °C

           ΔT =  95.0°C - 25.0°C

                 = 70.0°C

So, amount of heat = 5.50 x 0.897 x 70.0

                                = 34.5354 J = 34.5 J

Thus, the amount of heat absorbed when 5.50 g of aluminum is heated from 25.0°C to 95.0°C is 34.5 J.

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Two molecules having different sizes but the same functional groups will take part in chemical reactions. Functional groups are used in the field of organic chemistry. Here the given molecule has ketone functional group. The correct option is D.

The substituent atoms or groups of atoms which are attached to specific molecules are defined as the functional groups. These moieties are responsible for the chemical reactions. The same functional group will experience comparable reactions regardless of the chemical in which it is present.

A ketone is a functional group which consists of a carbonyl carbon bound to an oxygen atom by a double bond and two alkyl or aryl groups. Ketones are usually represented as RCOR, where two R's can be any alkyl or aryl group. Their general formula is CₙH₂ₙO.

Lower ketones are soluble in water because they consist of the polar carbonyl group.

Thus the correct option is D.

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Moles are the divisional of the mass and the molar mass. In 13.95 gms of calcium, there are 0.348 moles.

In chemistry, moles are the measurement units that are used to estimate the small entities of the atoms or the molecules. Moles are calculated as:

Moles = mass ÷ molar mass

We know,

The molar mass of calcium = 40 gm/mol

The mass of calcium = 13.95 gms

Moles of calcium are calculated as:

Moles = 13.95 ÷ 40

= 0.348 moles

Therefore, in 13.95 gms 0.348 moles of calcium is present.

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Answer: The high temperature raises the volume of air inside the ball according to Charles's law because this law describes how a gas will behave at constant pressure.

Answer:

D. The high temperature raises the volume of air inside the ball according to Charles's law because this law describes how a gas will behave at constant pressure.

Explanation:

I took the exam

The energy comes from the sun, captured through photosynthesis.

The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton.

W = mg

Weight of object = mass of object × acceleration of gravity

Answer:

Hydrogen chloride is a mixture of hydrogen and chlorine elements. The chemical abbreviation of hydrochloric acid is HCl.

Explanation:

The correct structure that corresponds to the name in the image above is structure A. Details about hydrocarbons can be found below.

Alkanes are organic compound that belongs to any acyclic saturated hydrocarbon e.g. methane, ethane, etc.

Alkanes have a single carbon bond and can be attached to by certain compounds. Methyl is a compound with the formula; CH3.

Therefore, the correct structure that corresponds to the name in the image above is structure A.

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Answer:

C

Explanation:

It was right on acellus

The number of moles in 72 gram H₂O is 3.942 MOL.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

First, know the molar mass of water.

The given mass is 71 gram

[tex]\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\\\rm Number\;of \;moles= \dfrac{71}{18.01}= 3.942 mol[/tex]

Thus, the number of moles in 72 gram H₂O is 3.942 MOL.

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Answer: 2.749 x 10^-14

Explanation:

Given:

The concentration of Ce(IO3)4 in the solution = 1.5 x 10-2 g/100 mL= 0.15 g/1000 mL​​​​​​​= 0.15 g/L

Molar mass of Ce(IO3)4 = 839.7267 g/mol

Therefore, the molarity of Ce(IO3)4 in the solution is given by:

[tex]$$\begin{gathered}M=\frac{0.15 \mathrm{~g} / L}{839.7267 \mathrm{~g} / \mathrm{mol}} \\M=1.7863 \times 10^{-\mathbf{4}} \mathrm{mol} / {L}=\mathbf{1 . 7 8 6 3 \times 1 0 ^ { - \mathbf { 4 } } \boldsymbol { M }}\end{gathered}$$[/tex]

The solubility equilibrium is given by:

[tex]$$\mathrm{Ce}\left(\mathrm{IO}_{3}\right)_{4(s)} \rightleftharpoons \mathrm{Ce}_{(a q)}^{3+}+3 \mathrm{IO}_{3}^{-}(a q)$$[/tex]

Therefore, the solubility product is given by:

[tex]\begin{gathered}K_{s p}=\left[C e^{3+}\right] \cdot\left[I O_{3}^{-}\right]^{3} \\\therefore K_{s p}=\left(1.7863 \times 10^{-4}\right) \times\left(3 \times 1.7863 \times 10^{-4}\right)^{3}\end{gathered}[/tex]

[tex]\therefore {K_{s p}=2.749 \times 10^{-14}[/tex]

Individual marble:

Answer:

Individual Marble

Use the formula 4/3_?_ R^3, to solve for the volume. Here, R is the radius, or half of D. ^3 means the radius is cubed.

Explanation:

Answer:

Explanation:

SI unit is an international system of measurements that are used universally in technical and scientific research to avoid the confusion with the units. Having a standard unit system is important because it helps the entire world to understand the measurements in one set of unit systems.

Unit of Electric Charge: Unit of Wavelength

Unit of Mass: Unit of Velocity:

Yes. If you lower the temperature of a test tube of water slowly, the water can remain liquid if it is not disturbed. As soon as the super cold water is disturbed the water will start crystalizing at a nucleation point and will convert to ice very quickly.

The Gibbs Free Energy at 298 K, AH = 46 kJ/mol and sº = 0.097 kJ/(K-mol) is 28.906 kJ/mol

It serves as the single master variable that determines whether a given chemical change is thermodynamically possible.

Thus if the free energy of the reactants is greater than that of the products, the entropy of the world will increase when the reaction takes place as written, and so the reaction will tend to take place spontaneously.

Conversely, if the free energy of the products exceeds that of the reactants, then the reaction will not take place in the direction written, but it will tend to proceed in the reverse direction.

At 298 K,

AH = 46 kJ/mol

and sº = 0.097 kJ/(K-mol).

ΔG=ΔH−T⋅ΔS

ΔG = 46 - 298 * 0.097

ΔG = 46 - 28.906

ΔG = 28.906 kJ/mol

The Gibbs Free Energy at 298 K, AH = 46 kJ/mol and sº = 0.097 kJ/(K-mol) is 28.906 kJ/mol

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Answer: A

Explanation: just did it

Answer:

base

Explanation:

bases have a phone scale more than 7

[tex]\tt \dfrac{7.5}{12}\times 100=62.5~ml[/tex]

Answer:

About 512 g.

Explanation:

We are given a sample of P₂Cl₅ that contains 179 grams of phosphorus, and we want to determine the grams of chlroine that is present.

Thus, we can convert from grams of phosphorus to moles of phosphorus, moles of phosphorus to moles of chlorine, and moles of chlorine to grams of chlorine.

From the formula, there are two moles of P for every five moles of Cl. The molecular weights of P and Cl are 30.97 g/mol and 35.45 g/mol, respectively. Hence:

[tex]\displaystyle 179\text{ g P} \cdot \frac{1\text{ mol P}}{30.97\text{ g P}} \cdot \frac{5\text{ mol Cl}}{2\text{ mol P}} \cdot \frac{35.45\text{ g Cl}}{1\text{ mol Cl}} = 512\text{ g Cl}[/tex]

In conclusion, there is about 512 grams of chlorine present in the sample.

Alternatively, we can mass percentages. The mass percent of phosphorus in P₂Cl₅ is:

[tex]\displaystyle \% \text{P} = \frac{2(30.97)}{5(35.45) + 2(30.97)} = 25.90\%[/tex]

Because there are 179 grams of phosphorus, the total amount of sample present is:

[tex]\displaystyle \begin{aligned} 25.90\% \cdot m_T & = 179\text{ g P} \\ \\ m_T & = 691.1 \text{ g}\end{aligned}[/tex]

Therefore, the amount of chlorine present is 691.1 g - 179 g, or about 512 g, in agreement with our above answer.

Molecules and the moles can be interconverted into each other with the help of the Avogadro's number. In 8.5 x 10⁻² moles of hydrogen fluoride, there are 51.17 × 10²¹ molecules.

Avogadro's number is the special number that converts the moles into molecules and vice versa. The value of the Avogadro's number is 6.02 x 10²³.

If 1 mole of HF has 6.02 x 10²³ molecules then,

8.5 x 10⁻² moles of HF will have:

(8.5 x 10⁻²) × 6.02 x 10²³) = 51.17 × 10²¹

Therefore, 51.17 × 10²¹ molecules are present in HF.

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Answer:

answer in picture

Explanation:

The balanced chemical equation will be Ca + MgCl2 → CaCl2 + Mg.

An equation that has the same quantity of atoms on both sides of the arrow would be said to represent a balanced chemical reaction.

The given equation is Ca + MgCl2 →

It is known that when Ca is reacted with magnesium chloride ( MgCl2) then it will form calcium chloride (CaCl2 ) and magnesium.

Ca + MgCl2 → CaCl2 + Mg.

It can be seen that, calcium has one atom in the reactant side and one atom in product side. On the other hand, chlorine has one atom in reactant side as well as product side.

Hence, the reaction will be balanced.

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Selenium chloride has a molar mass of 149.86 g/mol. The mass of selenium dichloride in grams is 29.22 grams.

Mass is the quantity of matter of a physical body.

The molar mass is given 149.86 g/mol

The number of moles is 0.195

By the formula of molar mass

[tex]\rm Molar\;mass = \dfrac{mass}{number\;of\;moles} \\\\\rm mass = molar mass \times number\;of\;moles\\\rm mass =149.86 \times 0.195 = 29.22 g[/tex]

Thus, the mass of selenium dichloride in grams is 29.22 grams.

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Answer:

67.2 litres of oxygen will be consumed

Explanation:

Step 1 : Write the balanced chemical equation:

2H₂ + O₂ → 2H₂O

Step 2: find the ratio of O₂ : H₂O

O₂ : H₂O

1 : 2

67.2 : 33.6

Thus, 67.2 litres of oxygen will be consumed

a mixture can be separated by a filter

Answer:

mass is always constant for a body.

Explanation:

one way to calculate mass is Mass=Volume ×Density

Answer:

lithium lithium (or 2lithium) + oxygen ->

Explanation:

Your welcome

Answer:

A + B → C + D + heat

Explanation:

A. A+B+heat⇒C+D

In an endothermic reaction, the system requires energy/heat, the enthalpy change is positive.

Answer:

= 0.524M

Explanation:

data;

volume = 490ml

              = 490 / 1000

               = 0.49 dm^3

moles = 0.257 moles

molarity = ?

solution:

molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]

               = 0.257 / 0.49

 molarity  = 0.524M