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3 years ago

Molecules _____.

Chemistry

2 answers:

gogolik [260]3 years ago

6 0

Explanation:

By its classical definition, a molecule is the smallest particle of a substance that retains the chemical and physical properties of that substance. They are composed of two or more atoms, a group of like or different atoms held together by chemical forces.a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

ra1l [238]3 years ago

4 0

Answer:

Explanation:

A is incorrect because they are named by elements and the number of atoms.

B is incorrect because the smallest units of matter are usually considered to be atoms.

C is incorrect because O2 is considered a molecule, and is made of only one element.

So, D is correct, because molecules are groups of two or more atoms that are held together by chemical bonds.

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A 0.8715 g sample of sorbic acid, a compound first obtained from the berries of a certain ash tree, is burned completely in oxyg

aivan3 [116]

<h3><u>Answer</u>;</h3>

C3H4O

<h3><u>Explanation;</u></h3>

Empirical formula is the simplest formula of a compound;

Molar mass CO2 = 44.01

Mass of CO2 produced = 2.053 g

Mass of carbon in original sample = 12.01/44.01 × 2.053

= 0.5603g

Molar mass H2O = 18

Mass of H in original sample = 2/18 ×0.5601

= 0.0622 g

Thus; original sample contained 0.5603g C and 0.0622g H. The balance of the sample was O

Mass of O = 0.8715 - (0.5603 + 0.0622) = 0.249g

The mole ratio of C:H:O will be;

Moles C = 0.5603/12 = 0.0467

Moles H = 0.0622

Moles O = 0.249/16 = 0.01556

C:H:O = 0.0467:0.0622:0.01556

Divide through by 0.01556:

C:H:O = 3:4:1

Empirical formula is thus C3H4O

8 0

4 years ago

Read 2 more answers

Which of the following statements is true about both nuclear fusion and nuclear fission? They occur in the sun. Heavy atoms are

galina1969 [7]

<h2>Answer </h2>

Some mass changes into energy

<u>Explanation </u>

Some mass changes into energy are true about both nuclear fusion and nuclear fission. These both reactions produce large amounts of energy. Nuclear fusion is the process in which two light nuclei combine to form a larger nucleus. On the other hand, nuclear fission is reverse in which a heavy nucleus breaks into two light nuclei. Nuclear decay and transmission are also types of nuclear reactions. The matter is not destroyed in nuclear reactions.

6 0

4 years ago

Important of thermometer

Mama L [17]

Answer:

to see if something or someone has either a low or high temperature

Explanation:

because you wanna know if some has a fever so you dont get the coronna virus

7 0

3 years ago

Electrons are deflected by a magnetic field because...

max2010maxim [7]

they have a negligible mass and they also have a negative charge so they have an association with the magnetic field. Do you remember polar? So electrons are negative and they attract the nucleus which is overall postivie (since protons are positive) so they act as magnetic since they both have an attraction

5 0

3 years ago

A binary ionic compound is known to contain a cation with 51 protons and 48 electrons. The anion contains one-third the number o

7nadin3 [17]

Answer:

$SbCl_3$

Explanation:

The cation contains 51 protons and 48 electrons. The electrons are only lost not protons, so the element which corresponds to atomic number 51 is the cation which is Antimony (Sb).

Also, the charge on the cation is 51 - 48 = 3

This is because neutral atom contains the same number of electrons as protons.

Given the anion has one-third protons as cation which means thta:

Number of protons in anion = $\frac {51}{3}=17$

This corresponds to chlorine atom. The electrons are 1 greater than protons means that it has gain 1 electron.

So,

Sb Cl

3 1

Cross multiply the valency.

So, formula is $SbCl_3$

4 0

3 years ago