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3 years ago

The questions in bold are questions you shouldnt answer, answer the rest.

Chemistry

2 answers:

velikii [3]3 years ago

8 0

A variable is not consistent or having a fixed pattern; liable to change.

elixir [45]3 years ago

7 0

I can answer one of those...

In solids, the particles are just barely vibrating, and have their own shape. In liquids, the particles are moving more, and they are sliding around and moving places. Their shape can change based on the container they’re in, but the volume stays the same. The particles in a gas are moving very fast, and are far away from each other. A gas can change its volume and shape. If you want to do plasma, that’s when the particles are moving so fast that they can create light. I was going to do the variable thing but it would sound weird and very wordy if I tried to explain it.

Written by a 6th grader who is currently learning about states of matter :P

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1. How to elements differ from compounds?

REY [17]

Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements contain only one type of atom.

Explanation:

5 0

3 years ago

Part C<br> Number of molecules in 8.437x10-2 mol C6H6

N76 [4]

Answer:

There are $5.08\times 10^{22}\ \text{molecules of}\ C_6H_6$

Explanation:

In this problem, we need to find the number of molecules in $8.437\times 10^{-2}$ mol of $C_6H_6$ .

The molar mass of $C_6H_6$ is $6\times 12+1\times 6=78\ g/mol$

No of moles = mass/molar mass

We can find mass from above formula.

$m=n\times M\\\\m=8.437\times 10^{-2}\ mol\times 78\ g/mol\\\\m=6.58\ g$

Also,

No of moles = no of molecules/Avogadro number

$N=n\times N_A\\\\N=8.437\times 10^{-2}\times 6.023\times 10^{23}\\\\N=5.08\times 10^{22}\ \text{molecules}$

Hence, there are $5.08\times 10^{22}\ \text{molecules of}\ C_6H_6$

5 0

3 years ago

What is the molarity of a solution that has 2.52 grams of NaCO3 dissolved to

sammy [17]

Answer:

Explanation:

2.52g/ 0.125L= 20.16M

5 0

2 years ago

Use the periodic table to answer the questions below.

Romashka-Z-Leto [24]

B ............ is the answer,

3 0

2 years ago

Read 2 more answers

What is the empirical formula of a compound that is composed of 60.94% carbon 15.36% hydrogen and 23.70% nitrogen

Musya8 [376]

Answer:

C₃H₉N

Explanation:

The empirical formula of a compound is the fundamental and basic possible formula that shows the mole ratio of the atoms of each element in a molecule of the compound.

mole ratio of carbon = 60.94/12 = 5.078

mole ratio of hydrogen = 15.36/1 = 15.36

mole ratio of nitrogen = 23.70/14 = 1.693

Now; we will divide by the smallest value

So; carbon = 5.078/1.693 = 2.99 ≅ 3.0

hydrogen = 15.36/1.693 = 9.07 ≅ 9.0

nitrogen = 1.693/1.693 = 1 ≅ 1

Thus, the empirical formula is = C₃H₉N

6 0

3 years ago