All categories

3 years ago

Which of these substances are molecules?

2 answers:

Studentka2010 [4]3 years ago

7 0

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. So I would say is all of them, as they all contain two atoms each even in the diatomics

lorasvet [3.4K]3 years ago

5 0

The answer is; All of them

A molecule is a stable chemical unit (with neutral charge) of atoms chemically bonded together (these bonds can be covalent, metallic, ionic, and etcetera). The molecule can, therefore, be of an element (contain atoms of the same element – in this case, N2 and O2) or a compound (atoms of different elements- in this case, H2O and NaCl).

You might be interested in

Please help me, I really don't want to fail but I don't know how to do this

Brrunno [24]

Answer:

4, 7, 4, 6

12 moles

Explanation:

$NH_{3}(g) + O_{2}(g) \: → NO_{2} + H_{2}O(g)$

__↑______↑

8.00 mol | 14.00 mol

________________

$NH_{3}(g) + O_{2}(g) \: → NO_{2} + H_{2}O(g)$

You can turn this into a system of variables which are solvable.

To do this, create variables for the coefficients of each compound in the reaction respectively.

$a(NH_{3}(g)) + b(O_{2}(g)) → \\c(NO_{2}) + d(H_{2}O(g))$

Because to be balanced, the count of atoms in each element of the compound correspond to the coefficient of the variable in that compound so that the count of the left (reactant) side is set equal to the right (product) side.

a corresponds to the coefficient of the first compound, b corresponds to the coefficient of the second compound, c corresponds to the coefficient of the third compound, and d corresponds to the coefficient of the fourth compound.

(Reactant = Product)

Reactant: 1a [N] Product: 1c.

Reactant: 3a [H] Product: 2d.

Reactant: 2b [O] Product: 2c + 1d.

Thus the system is:

1a = 1c

3a = 2d

2b = 2c + 1d.

Then just use the substitution methods to solve.

3 0

3 years ago

Write down examples of some natural acids and natural bases. Also write use of them.

trasher [3.6K]

Answer:

Formic acid, citric acid, Oxalic acid, washing soda, baking soda, etc. can be some examples of natural acids and natural bases. They both have domestic, industrial, and various other purposes.

Explanation:

<h3>NATURAL ACIDS:</h3>

There are lots of natural acids present in our nature. Some of them are the following:

> Formic acid

USE: It is used in the stimulation of oil and gas wells as it is less reactive towards the metal.

> Citric acid

USE: It is considered as the best rust remover as it doesn't harm the metal just remove the rust.

> Oxalic acid

USE: It easily remove iron and ink stains and that's why it is used as an acid rinsing material in Laundries.

<h3>NATURAL BASES:</h3>

There is a variety of natural base found in our nature which founds a lot of uses in day to day life. some of them are the following:

> Washing soda

USE: It is used in commercial detergent mixture to treat hard water.

> Baking soda

USE: It is the best rising agent used mostly in cooking and for domestic purposes like removing stains, etc..

3 0

3 years ago

Calculate the mass percent composition of carbon in C4F8

Anon25 [30]

My work to your question

4 0

4 years ago

Calculate the period when the frequency is 50Hz.

liraira [26]

Answer:

For example, a wave with a time period of 2 seconds has a frequency of 1 ÷ 2 = 0.5 Hz. A radio wave has a time period of 0.0000003333333 seconds.

8 0

3 years ago

How many unpaired electrons are in sulfur

12345 [234]

There are 2 unpaired electrons in sulphur orbital...

5 0

3 years ago

Read 2 more answers