All categories

3 years ago

Element compound2. Select all the compounds from the following elements

Chemistry

1 answer:

bulgar [2K]3 years ago

3 0

Answer: $Fe_2O_3$ and $C_2H_4O_2$ are the compounds.

Explanation:

A chemical compound is defined as a chemical substance that is formed by the combination of two or more atoms of different elements which cannot be separated by any physical means but when chemically treated, they decompose into their parent elements.

For example, water is made up of hydrogen and oxygen. This compound is a liquid and its individual components are gases. When water is decomposed, it forms hydrogen and oxygen gas.

For the given options:

He(Helium) is an element formed by the combination of only type of atoms.

$O_2$ and $P_4$ are molecules of same element.

$Fe_2O_3$ is a compound fomed by the combination of iron and oxygen atoms.

$C_2H_4O_2$ is a compound fomed by the combination of carbon, hydrogen, and oxygen atoms.

Hence, $Fe_2O_3$ and $C_2H_4O_2$ are the compounds.

You might be interested in

Covalent bonds can occur where atoms share one or more pairs of electrons. Which of the following would form a double covalent b

mojhsa [17]

Answer:

The answer to your question is: CO2

Explanation:

The information given is correct, Covalent bonds occur when atoms share one or more pairs of electrons, but also, covalent bonds occur with nonmetals, then,

a.NaCl This elements form an ionic bond, so this option is incorrect.

b.Cl2 Here there are two non metals but the form one single covalent bond, so this option is incorrect.

c.CO2 Carbon dioxide forms 2 double covalent bonds.

d.NH3 ammonium only forms single covalent bonds

6 0

3 years ago

Elaborate on the difference in natural occurrences between fission and fusion reactions. A) Neither fission nor fusion reactions

vazorg [7]

Okay then I would go with choice B since fusion takes place in the sun which is a giant star.

8 0

3 years ago

Read 2 more answers

Try to rationalize the sign of ΔS∘rxn in each case.

bonufazy [111]

Answer:

a) decrease, gas

b) increase, gas

c) liquid

d) increase, solid

Explanation:

Entropy refers to the degree of disorderliness of a system. If the number of moles of gas increases from left to right in a reaction, the entropy of the system increases positively.

Similarly, when the number of liquid molecules remain constant, there could only be a very little increase in entropy.

However, solids have the least entropy and the entropy of a system decreases when a system yields solid products.

6 0

3 years ago

The _______ geometry of a water molecule is tetrahedral even though the molecular geometry is bent

IRINA_888 [86]

The electron geometry of a water molecule is tetrahedral even though the molecular geometry is bent.

As water molecule hybridisation is sp³ that provides it a electron geometry tetrahedral but due to presence of 2 lone pairs and 2 bond pairs its molecular geometry is bent.

The hybridisation sp³ makes electron geometry of a water molecule tetrahedral but the presence of 2 lone pairs makes its molecular geometry bent

6 0

3 years ago

Read 2 more answers

348 g of water starting at 4.0°Celsius is heated until his temperature is 37°Celsius. Calculate the amount of heat energy needed

attashe74 [19]

Answer:

48.049 kJ or 48049 J

Explanation:

Hello again.

So we know the formula $q = mc\Delta t$ . c is the heat capacity but this time, it is not given. However, water has a very well known heat capacity which is 4.184 J/(g°C). This is in fact the number we refer to a calorie which is the amount of energy you burn that can raise the temperature of 1g of water by 1°C. So, plugging in values, you get the above. But double check if I am wrong.

7 0

3 years ago