Name the following carboxylic acid:
COOH
A. 3-ethyl-2-methylheptanoic acid
B. 2-ethyl-1-methylhexanoic acid

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:1.04 grams per cubic centimeter

Explanation:

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669 J

Right option is D.

Step by Step Explanation:

[tex] \sf Mass \: of \: water(m) = 16g \\ \\ \sf Specific \: heat \: of water(C) = 4.18J/g \\ \\ \sf Change \: in \: temperature ( \triangle T) = 100 - 90 = 10{ \degree}C[/tex]

Now substituting the required values.

[tex] \sf \hookrightarrow Heat = 16 \times 4.18 \times 10 \\ \\ \sf \hookrightarrow Heat = 668.8(approx) \\ \\ \blue {\boxed { \hookrightarrow{Heat = 669J }}}[/tex]

Answer:

C. sources

Explanation:

Answer:

is D :)

Explanation:

Answer:

information from station to receiver

Solving typed question by you

Apply charles law

Answer:

See below ~

Explanation:

Typed question

Given :

Unknown :

Formula :

Solution :

Final Answer :

Question 3 (in attachment)

Given :

Unknown :

Formula :

Solution :

Final Answer :

Answer:

Explanation:

Net ionic equations must be balanced by both mass and charge. Balancing by mass means ensuring that there are equal masses of each element on the product and reactant sides. Balancing by charge means making sure that the overall charge is the same on both sides of the equation.

Answer:

Transition state falls apart to form products.

Explanation:

Reactants collide to form a transition state is actually the initial step (not the last step) because reactants have react with each other. Transition state is the middle stage, once this stage falls or passes, you get products. I have attached an example reaction scheme to better understand.

Answer:

Is drinks a compound or mixture?

Drinks are usually solutions of various substances dissolved in the water. Since the amount of each of these can vary (sugar, flavoring, color, carbonation), it’s a mixture. The components can be separated by various physical methods such as evaporation. Is smoke a compound or a mixture? Smoke is a mixture.

Answer:

C.

Explanation:

Exothermic means the energy of products is lower than energy of reactants. Transition state will always be the highest energy among the two.

At constant temperature, if the pressure is compressed to the given value, the volume of the nitrogen gas increases to 23.2L.

Boyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.

Boyle's law is expressed as;

P₁V₁ = P₂V₂

Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.

Given that;

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂

V₂ = (0.98atm × 22.5L) / 0.95atm

V₂ = 22.05Latm / 0.95atm

V₂ = 23.2L

Therefore, at constant temperature, if the pressure is compressed to the given value, the volume of the nitrogen gas increases to 23.2L.

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Answer:

KOH

Explanation:

When ionic compounds (a metal and a nonmetal) dissolve, they are good conductors of electricity, and would result in the brightest light. Weak bases and covalent compounds do not dissolve, so KOH, a strong base and ionic compound, would dissolve and conduct electricity.

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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Mass of H_2SO_4 required

Molarity

So

Now molar mass of H_2SO_4

Mass

Based on the molar mass of the protein, the concentration of the unknown protein is 0.0011 mM (millimolar).

Concentration is the amount of a solute present in a given volume of substance.

Moles of protein = mass/molar mass

molar mass of protein = 118 × 64 = 7552 g/mol

Moles of protein in 8.3 g = 8.3/7552 = 0.0011 moles

Concentration = 0.0011 mole/mL = 0.0011 mM.

Therefore, the concentration of the unknown protein is 0.0011 mM (millimolar).

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G. Empty space

Hope this helps!

Excess reagents are the chemical species that remain after the reaction completion. 14 gms of aluminum carbonate will be formed.

Grams are the unit of the mass that is defined by the product of the moles and the molar mass of the substance.

The balanced chemical reaction is shown as:

3 K₂CO₃ + 2 Al(NO₃)₃ → Al₂(CO₃)₃ + 6 KNO₃

From the reaction, it can be said that 2 moles of aluminum nitrate are required to produce a mole of aluminum carbonate.

Moles of potassium carbonate are calculated as:

Moles = 24.76 gm ÷ 138.205 g/mol = 0.179 moles

If 3 moles of potassium carbonate produce 1 mole of aluminum carbonate, then 0.179 moles will produce 0.059 moles.

From the moles, mass is calculated as:

Mass = moles × molar mass

= 0.059 moles ×  234.08 g/mol

= 13.97 gms

Therefore, 14 gms of aluminum carbonate will be formed.

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Answer:

C

Explanation:

The units of specific heat are usually calories or joules per gram per Celsius degree. For example, the specific heat of water is 1 calorie (or 4.186 joules) per gram per Celsius degree. The Scottish scientist Joseph Black, in the 18th century, noticed that equal masses of different substances needed different amounts of heat to raise them through the same temperature interval, and, from this observation, he founded the concept of specific heat. In the early 19th century the French physicists Pierre-Louis Dulong and Alexis-Thérèse Petit demonstrated that measurements of specific heats of substances allow calculation of their atomic weights (see Dulong-Petit law). See also heat capacity.

The statement that represents the quantity of heat required to raise the temperature of one gram of a substance by one degree Celsius is Specific heat capacity. The correct option is C.

When the temperature of a material rises 1 K (or 1 °C), the amount of heat (J) is absorbed per unit mass (kg). It is crucial since it will show how much energy will be needed to warm or cool an object of a certain mass by a certain amount.

The formula of specific heat capacity is [tex]Q=mc\Delta T[/tex]  Where q is the specific heat, m is the mass and t is the change in temperature.

According to the definition, a material's specific heat capacity is normally calculated by calculating the heat capacity of an illustration of the substance, commonly using a calorimeter, and dividing by the sample's mass.

Thus, the correct option is C. Specific heat capacity.

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Answer:Nitrogen can be transformed into oxygen by bombarding an alpha particle into the nucleus of nitrogen. An atom of hydrogen is produced as part of the transformation. Aluminum is transformed into phosphorous by combining the nucleus with an alpha particle

Explanation:

Answer:

C) 4

Explanation:

The reaction :

       12g      4g             16g

Hence, based on this we can say that : 2 moles of hydrogen gas are needed to produce 16g of methane.

For 32g of methane

According to the stoichiometry, 8 moles of hydrogen gas are needd to produce 32 g  of methane.

Stoichiometry  is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample. It is a quantitative study of reactants and products. Stoichiometric conversions make use of mass and moles.In the given example and according to the chemical reaction given,as 4 moles of hydrogen produce 16 g methane,∴for 32 g methane, 32×4/16=8 moles.

Thus , 8 moles of hydrogen gas are required to produce 32 g of

methane.

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The solubility product of the substance MS in water is 2.0 * 10^-8.

The solubility product is an equilibrium constant that shows the extent to which a solid is dissolved in water.

In this case, the equilibrium is; MS(s) = M²+ (aq) + S²-(aq) but M²+ (aq)] = S^2-(aq)] = 0.000143 mol L-¹.

Thus

Ksp = [0.000143 ]^2 = 2.0 * 10^-8

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Answer:

Strong acids. hope this helps :)