CHEMISTRY HIGH SCHOOL

Hydrocarbons having the same formula but variations in structure are called isomers.a. True
b. False

Answers

Answer 1
Answer:

Answer:The given statement is true.

Explanation:

Isomers are defined as two or more compounds with same structural formula but different arrangement of atom and chemical properties.

For example: Butane, 2-methyl propane are isomers with structural formula C_4H_(10), acetone and propanal both isomers to each other with same structural formula of C_3H_6O.

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Which of the following can only be separated into two or more pure substances by a chemical change?a. an element
b. a compound
c. a homogeneous mixture
d. a heterogeneous mixture

Answers

The best answer to the question that is being presented above would be letter b. A compound can only be separated into two or more pure substances by a chemical change. Mixtures can be separated without chemical change. 

How do i separate sugar from rice

Answers

If you're doing it at home you could use a strainer if it's holes are small enough. In chemistry classes, they have this shaker where you can change the size of the holes
im not sure but, you need a plastic spoon with tiny holes rice cant fit through, of but the rice and sugar in a bowl o water and take the rice out

What is the volume, in cubic meters, of an object that is 0.23 m long, 7.5 m wide, and 6.5 m high?

Answers

Answer:

Explanation: Multiply all the numbers together

Formula for Volume : L x W x H

When might a large volume of material have little mass

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A large volume of material will have a small amount of mass when thematerial in question is gaseous or porous, and therefore has a lot ofspace within it despite taking up a large amount of space overall.

How many covalent bonds can each carbon atom form?

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The covalent bonds present in based on the valence electrons and thus form 4 bonds.

What are valence electrons?

The valence electrons are the number of electrons present on the last orbital of the atom.

The atomic number of carbon is 6, thereby it is given with the electronic configuration 2, 4.

There is the presence of the 4 valence electrons in the carbon atom, and thereby the number of covalent bonds formed by carbon atom is 4.

Learn more about valence electrons, here:

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Carbon can form a maximum of 4 covalent bonds because it has 4 valence electrons i.e. 4 outer electrons. 

an organic compound on analysis yielded 2.04g carbon, 0.34g hydrogen, 2.73g oxygen. calculate the empirical formula​

Answers

Answer:

CH2O

Explanation:

According to this question:

C = 2.04g

H = 0.34g

O = 2.73g

First, we divide the mass value of each element by its atomic mass to convert to moles.

C = 2.04g ÷ 12 = 0.17mol

H = 0.34g ÷ 1 = 0.34mol

O = 2.73g ÷ 16 = 0.17mol

Next, we divide by the smallest mole value (0.17):

C = 0.17mol = 0.17 = 1

H = 0.34mol ÷ 0.17 = 2

O = 0.17mol ÷ 0.17 = 1

The whole number ratio of C,H,O is 1:2:1, hence, the empirical formula is CH2O.

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