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2 years ago

What is indicated by the methyl- prefix

Chemistry

1 answer:

Ugo [173]2 years ago

3 0

Answer:

Explanation:

The methyl prefix means theres a CH3 group bonded to a carbon in a hydrocarbon. This is called branching because it looks like a branched tree. This is literally cheating but you do you.

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H2SO4, sulfuric acid, contains three different types of atoms: hydrogen (H), sulfur (S), and oxygen (O). Each of these atoms rep

romanna [79]

Answer: Different elements. H2SO4 is a compound.

Explanation:

Element are the simplest substances and can't be broken down. Is a substance whose atoms all have the same number atomic number. The atomic number indicates the number of protons in the nucleus, and in a neutral atom it has the same number of neutrons. Therefore, for example, hydrogen is an element because it is an atom with a certain atomic number.

On the other hand, a compound is a mixture composed of two or more different elements. So, H2SO4 is made of three different elements, then it is a compound.

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4 years ago

CO2 + H2O → H2CO3. If 495 milliliters of carbon dioxide at 25°C and 101.3 kilopascals reacts with excess water, what is the theo

exis [7]

Answer:

The theoretical yield of carbonic acid is 1.24 grams.

Explanation:

The balanced equation for the formation of carbonic acid by the reaction of carbon dioxide with water is:

CO₂ + H₂O → H₂CO₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactant and product participate:

CO₂: 1 mole
H₂O: 1 mole
H₂CO₃: 1 mole

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

Moles of carbon dioxide can be calculated using ideal gas law equation. In this case:

P= 101.3 kPa= 1 atm
V= 495 mL= 0.495 L (being 1,000 mL=1 L)
n=?
R= 0.082 $\frac{atm*L}{mol*K}$
T= 25 C= 298 K (being 0 C=273 K)

Replacing:

1 atm* 0.495 L= n* 0.082 $\frac{atm*L}{mol*K}$ *298 K

Solving:

$n=\frac{1 atm*0.495 L}{0.082\frac{atm*L}{mol*K}*298 K }$

n= 0.02 moles

Then, by reaction stoichiometry 0.02 moles of carbon dioxide produces 0.02 moles of carbonic acid.

Since the molar mass of carbonic acid is 62.03 g/mol, then you can apply the following rule of three: if there are 62.03 grams in 1 mole, how much mass is there in 0.02 moles?

$mass=\frac{0.02 moles*62.03 grams}{1 mole}$

mass= 1.24 grams

<em><u>The theoretical yield of carbonic acid is 1.24 grams.</u></em>

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3 years ago

If the rate of diffusion of H2S is about one Fourth times faster than that of SO2 by what factors is the rate of diffusion of am

Rudiy27

Explanation:

rate of diffusion of H2S is about one Fourth times faster than that of SO2 by what factors is the rate of diffusion of ammonia faster than that

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3 years ago

What is the reaction of Dimethylamamine + acetic acid

Arada [10]

DMA is prepared commercially by the reaction of dimethylamine with acetic anhydride or acetic acid. Dehydration of the salt of dimethylamine and acetic acid also furnishes this compound: CH3CO2H·HN(CH3)2 → H2O + CH3CON(CH3) Dimethylacetamide can also be produced by the reaction of dimethylamine with methyl acetate.

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3 years ago

2H2 + O2=2H2O How many water molecules are created when 32 grams of oxygen react completely with 4 grams of hydrogen?

Umnica [9.8K]

32 grams of $O_2$ is 1 mole.

4 grams of $H_2$ is 2 moles.

So we have 2 moles of $H_2O$ . Each mole has approximately $6 \cdot 10^{-23}$ particles. In 2 moles of water, there are $12 \cdot 10^{-23}$ water molecules.

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3 years ago

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What is indicated by the methyl- prefix ​

What is indicated by the methyl- prefix