The empirical formula for a compound is C2H4NO. If its molar mass is 232.2 g/mol, what is the molecular formula of the compound?

Explanation:

the. correct option is d

Answer:

.4998 atm    ( rounded to .5 atm   ) <===== not one of the answers listed

Explanation:

The partial pressure exerted by O2   is   equal to the fraction that is O2 times the pressure

1.5 / ( 1.5 + 1.2 + .301 )   * 1 atm = .4998 atm  

( 1) Are you sure it is   ONE atm pressure in the container?

(2) IS the first answer supposed to be   5 x 10^-1  atm    perhaps?

Answer:

283 grams KCl

Explanation:

To convert form moles to grams, you need to find the molar mass of your compound. The molar mass can be calculated using the individual molar masses of each element in the compound. These values can be found on the periodic table.

Molar Mass (K) = 39.098 g/mol

Molar Mass (Cl) = 35.453 g/mol

Molar Mass (KCl) = 39.098 g/mol + 35.453 g/mol

Molar Mass (KCl) = 74.551 g/mol

Now that you know the molar mass, you want to multiply it by the moles of KCl. This is possible because the molar mass is actually a ratio representing the relationship of grams and moles. In KCl, there are 74.551 grams of KCl for every 1 mole of KCl. When you are multiplying, make sure you set the ratio up in a way that allows for the units to cancel out and leave grams as your final answer.

3.80 moles KCl           74.551 g
-----------------------  x  -------------------  = 283 grams KCl
                                  1 mole KCl

The final answer should have 3 sig figs because the value the problem gave (3.80 mol) also has 3 sig figs.

Answer:

Matter is a substance that has inertia and occupies physical space.

Matter is literately in everything

Explanation:

Examples of matter:

Your body

A home

The air

Things that are not matter are:

A light

Heat form fire

Sounds

There not matter because you cant touch, smell or taste them.

Answer:

matter is any substance that occupies space and has weight

Examples

solid,liquids and gas e.t.c

bro hwnsbsjqjsnanqbsbjsjwhsshjs incorjssnsn

11460 years ago a sample of wood was the part of a living tree.

The time required for half of something to undergo a process.

Carbon-14 has a half-life of 5,730 years. That means that no matter how many carbon-14 atoms were present when something died, after 5,730 years only half of them are left the rest have decayed to nitrogen.

The half life of C-14 is [tex]t_{\frac{1}{2}}[/tex] =5730 years.

This means that if you start with a sample of 100g, only 50g will be left in 5730 years.

Here, Only 25g is left, therefore the number of years is =5730 × 2  = 11460years.

Hence, 11460 years ago a sample of wood was the part of a living tree.

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The volume of the air mattress in litres is 385 litres when absolute pressure was 3.5 kilopascals.

The ideal gas law (PV = nRT) relates to 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).

Given data:

P= 3.5 kPa      

V=?    

n= 0.55 moles of air    

T= 295K  

R= 8.314 (L kPa/mol K)

We use the constant rate of 8.314 because we are using kilopascals in this problem.

Using the equation:

PV=nRT,

V = [tex]\frac{0.55 \;moles \;X \;8.314 \;L \;k\;Pa/mol k \;X \;295 K}{3.5 \;kPa}[/tex]

V = 385.4132857 L.

Hence, the volume of the air mattress in litres is 385 litres.

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Answer: C

Explanation:

This is a fact.

Answer:

A hypothesis is a testable statement that is proposed to explain an observation/theory. In this case, one hypothesis that could be used is: Taller people have longer arms than smaller people. You could also say: As the height of an individual increases, the length of their arms also increases.

Independent variables are the variable that is manipulated. In this case, the independent variable is the height of the individual.

Dependent variables are those that change in response to the independent variable. In this case, the dependent variable is arm length.

The altered activity of the Pyruvate dehydrogenase enzyme is most likely contributing to his symptoms.

Pyruvate dehydrogenase is an enzyme that catalyzes the conversion of pyruvate to generate dihydrolipoamide and CO2.

This enzyme (Pyruvate dehydrogenase) is required to metabolize alcohol present in the blood.

In conclusion, the altered activity of the Pyruvate dehydrogenase enzyme is most likely contributing to his symptoms.

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Answer:

C. It is the ratio of the concentrations of products to the

concentrations of reactants.

Explanation:

At constant temperature and pressure, If the amount of gas increases to the given value, its volume also increases to 20.85L.

Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules."

It is expressed as;

V₁/n₁ = V₂/n₂

Given the data in the question;

V₁/n₁ = V₂/n₂

V₁n₂ = V₂n₁

V₂ = V₁n₂ / n₁

V₂ = (13.9L × 3moles) / 2moles

V₂ = 41.7molL / 2mol

V₂ = 20.85L

At constant temperature and pressure, If the amount of gas increases to the given value, its volume also increases to 20.85L.

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Answer:

1.840 x 10⁻³ mol HBrO₃

Explanation:

To find the moles of bromic acid (HBrO₃), you should (1) convert milligrams to grams (by dividing by 1,000) and then (2) convert moles to grams (via molar mass from periodic table).

Molar Mass (HBrO₃): 1.008 g/mol + 79.904 g/mol + 3(15.998 g/mol)

Molar Mass (HBrO₃): 128.906 g/mol

2.372 x 10² mg HBrO₃         1 g                1 mole
---------------------------------x----------------x------------------  = 1.840 x 10⁻³ mol HBrO₃
                                         1,000 mg      128.906 g

A) Anode - hydrogen gas

Cathode-oxygen gas

B) Hydrogen gas - The gas burns with a pop sound

Oxygen gas - The gas rekindles a glowing splint

C) The volume of gas produced at the cathode is 23 [tex]cm^3[/tex]

Electrolysis is the process by which electric current is passed through a substance to effect a chemical change.

The electrolysis of water produces two volumes of hydrogen at the anode and one volume of oxygen at the cathode.

The hydrogen gas burns with a pop sound. It is easily identified by this test. Also, oxygen is known to rekindle a glowing splint and this is a commonly used test for oxygen gas.

Since the ratio of hydrogen produced at the anode to oxygen produced at the cathode is 2:1 by volume; then when 23 [tex]cm^3[/tex] of oxygen is produced at the cathode, 46 [tex]cm^3[/tex]of hydrogen is produced at the anode.

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Answer: base

Explanation:

The water accepted another hydrogen ion, making it a base.

In the given acid-base reaction, H₂O (water) is the base because it accepts a proton (H+) from the hydrogen chloride (HCl) molecule and forms hydronium ion (H₃O+) by gaining an extra proton.

An acid-base reaction is a chemical reaction in which an acid reacts with a base to form a salt and water. In such a reaction, the acid donates a proton (hydrogen ion) to the base, which accepts the proton. The transfer of a proton from the acid to the base leads to the formation of the conjugate base of the acid and the conjugate acid of the base.

In general, an acid is a substance that donates a proton (H+) and a base is a substance that accepts a proton. When an acid and a base react, the resulting products are a conjugate acid-base pair, where the acid is the product that has gained a proton and the base is the product that has lost a proton.

In the given acid-base reaction, H₂O (water) is the base because it accepts a proton (H+) from the hydrogen chloride (HCl) molecule and forms hydronium ion (H₃O+) by gaining an extra proton.

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Answer:

2 mole of C4H10 were used in this reaction.

Bubbling or fizzing is usually observed when a chemical reaction occurs and is denoted as option D.

This occurs when one or more reactant form a new substance which is referred to as the product.

The bubbling or fizzing depicts effervescence which signifies that a new gaseous product has been formed.

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Answer:

A. The energy required to completely melt 1 g of a substance.

Explanation:

Because the root definition for Specific Heat Capacity is basically the amount of heat that's absorbed per unit mass of whatever material when the temperature is increasing. Or in other words, the amount of heat that's taken out or supplied to the unit mass of a system in order to increase or decrease its temperature by one degree. Hope this helps :)

Taking into account the definition of entropy, the entropy increases (option B).

Entropy can be interpreted as a measure of the random distribution of a system. In other words, the entropy S is a state function that measures the degree of molecular disorder of systems.

In this way, the change in entropy shows the change in molecular order that occurs in a chemical reaction. If the increase in entropy is positive, the products have a higher molecular disorder (higher entropy) than the reactants. On the other hand, when the increase is negative, the products are more ordered.

So, the entropy increases in the reaction if the total number of product molecules are greater than the total number of reactant molecules.

In this case, there are 12 moles of gaseous product, and 11 moles of gaseous reactant in the equation. This is, there are more moles in the products than in the reactants.

Therefore, the entropy increases (option B).

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Answer: 4.2

Explanation:

[tex]M_{A}V_{A}=M_{B}V_{B}\\(12)V_{A}=(250)(0.20)\\V_{A}=\frac{(250)(0.20)}{12}=\boxed{4.2}[/tex]

Graphite is structured in a way that: (A). Its carbon atoms are bonded to 3 other carbon atoms and are structured in layers that can slip past each other.

A graphite can be defined as a crystalline form of carbon.

Graphite is so important to man as it is used in many industries and factories as well as many countries to produce different products that can help mankind.

Graphite structure is quite a complex one and it involve carbons that have three of its electrons bonded and one free.

In conclusion, Graphite is structured in a way that: Its carbon atoms are bonded to 3 other carbon atoms and are structured in layers that can slip past each other.

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Answer:

When seismic waves from earthquakes ripple through its solid center, they hit a speed bump. The seismic vibrations should zip along about 30 percent faster than their actual speed, according to experiments and computer models re-creating the conditions inside the inner core.

Answer:

the freezeng point of solution is -12°c b/c it dencity is 0.854 formula =

Answer:

Permanent = false

Explanation:

All of the other choices are true

Answer:

Anhydrous copper (II) sulphate is white because it has no water in it. When drops of water are added, copper (II) sulphate turns blue. This colour change can be used to detect the presence of water (or water vapour).

The number of moles of Cr deposited by 1.5 F of electricity is 0.5 moles

The term electrolysis has to do with thee deposition of a solid when a direct current is passed through its solution.

Given the reaction;  Cr3+(aq)  + 3e ––›Cr(s)

If 3F of electricity is required to deposit  1 mole of Cr

1.5F of electricity is required to deposit  1.5F * 1 mole/3F

= 0.5 moles

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Answer: The pressure will increase.

Explanation:

    Boyle's law states that "the volume of a gas at constant temperature varies inversely with the pressure exerted on it." In other words, if there is more volume for the gas to spread, the pressure will decrease.

    This also goes the opposite way, meaning with less volume the pressure will increase.

Succinic acid most probably

Lets see why?

The molar mass is given as 118.084g/mol

Decimal next place i.e 10th place contains 0 means it has OH bonds in most of the cases.

So it's a hydrocarbon and more closely an alcohol or aldehyde

Let's verify

Approximately equal