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Sloan [31]
4 years ago
8

How many isomeric esters including structural isomers and stereoisomers can be made with the molecular formula C5H10O2 if methan

oic acid is one if the two reactants used.
A: 2. B: 3 C: 4 D: 5

Chemistry
1 answer:
defon4 years ago
3 0
Methanoic acid has a molecular formula of HCOOH, when form an ester it's HCOO-, so the rest of the ester is -C4H9, a saturated 4 carbon chain.  As shown in the attached diagram, there are 4 structural isomers, and the third isomer has 2 stereoisomers. So the answers is D:5.

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Which of the following correctly represents the radioactive decay of cesium-137?
Lelu [443]
The decay mode of cesium-137 is beta decay. This means that the cesium-137 decays into a beta particle and a nuclide with the same mass number, but with a charge number that is 1 more than that of cesium.

Therefore, this means Cs-137 decays into an electron and Barium-137, meaning the answer is choice 1.
6 0
2 years ago
Which statement accurately describes covalent bonds
DaniilM [7]
Options are as follow,

<span>A) Covalent bonds are formed by metals and nonmetals.
B) Covalent bonds are are typical of carbon compounds.
C) Covalent bonds are created by the attractions between oppositely charged ions.
D) Covalent bonds break apart when dissolved in water and allow for the conduction of electricity.

</span><span>Answer:
            Covalent bonds are formed by mutual sharing of electrons between two atoms of having electronegativity difference less than 1.7.  Among given options only option-B seems correct.

Explanation:
                    Carbon containing compounds are almost covalent in nature. Majority of organic compounds are made up of carbon, hydrogen, oxygen and nitrogen. And carbon makes covalent bonds with all these atoms.

Result:
          </span>Option-B is correct.
8 0
3 years ago
Arcturus is a star whose surface temperature is 4290 K. What is most likely the color of Arcturus? What is most likely the mass
sasho [114]

Answer: orange and 0.8

Explanation: edge2021

7 0
4 years ago
Read 2 more answers
A sample of propane (C3H8) has a mass of 0. 47 g. The sample is burned in a bomb calorimeter that has a mass of 1. 350 kg and a
Nady [450]

The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

The specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.

The specific heat has been expressed as:

q=mc\Delta T

<h3 /><h3>Computation for the heat absorbed</h3>

The iron and calorimeter are in side the closed system. Thus, the energy released by the sample, has been equivalent to the energy absorbed by the calorimeter.

q_{released}=q_{absorbed}\\&#10;q_{released}=m_{calorimeter}\;c_{calorimeter}\;\Delta T

The given mass of calorimeter has been, m_{calorimeter}=1350\;\rm g

The specific heat of the calorimeter has been, c_{calorimeter}=5.82\;\rm J/g^\circ C

The change in temperature of the calorimeter has been, \Delta T=2.87^\circ \rm C

Substituting the values for heat released:

q_{released}= 1350\;\text g\;\times\;5.82\;\text J/\text g^\circ \text C\;\times\;2.87^\circ \text C\\&#10;q_{released}=22,549.5\;\text J\\&#10;q_{released}}=22.54\;\rm kJ

The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

Learn more about specific heat, here:

brainly.com/question/2094845

6 0
3 years ago
A 200.0mL flask of unknown gas was placed in a hot water bath. The temperature of the bath was found to be 99 degrees C. The pre
masya89 [10]
A. Mass of the unknown gas.

The mass of the unknown gas is calculated by subtracting the weight of the empty flask from the mass when there was air in it.

      m = 126.593 g - 125.623 g

Simplifying,
     m = 0.97 grams

b. Molar mass of the gas
The molar mass of the gas is calculated by the ideal gas law.

                PV = (m/M)RT

where P is pressure,V is volume, m is the mass, M is the molar mass, R is the universal gas constant, and T is temperature. Substituting the known values to the equation,

     (733 mmHg/760 mmHg/atm)(0.20 L) = (0.97 g/M)(0.0821 L.atm/molK)(99 + 273.15 K)

The value of M in the equation is 153.64 g/mol.

<em>Answer: 153.64 g/mol</em>

8 0
4 years ago
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