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nikitadnepr [17]
3 years ago
15

What explains the relationship among elements, compounds & mixtures

Chemistry
1 answer:
Sauron [17]3 years ago
3 0
Elements are like loners, compounds are like couples, and mixtures are like a group of friends that can also have couples (compounds)
You might be interested in
How many moles of carbon dioxide gas can be produced when 7.94 moles of benzene (C6H6) react with excess oxygen? Be sure to show
Sliva [168]
The balanced equation is 

<span>2 C6H6 +15 O2 = 12 CO2 + 6 H2O </span>

<span>the ratio between C6H6 and CO2 is 2 : 12 </span>

<span>moles CO2 produced = 7.94 x 12 / 2 =47.6</span>
6 0
3 years ago
An emerald gemstone is an impure form of the mineral beryl, Be3Al2Si16O18. What is the percentage of silicon in the mineral?
solong [7]

Answer:

b. 54.9%

Explanation:

An emerald gemstone has the formula Be₃Al₂Si₁₆O₁₈. We can find the mass of each element in 1 mole of Be₃Al₂Si₁₆O₁₈ by multiplying the molar mass of the element by its atomicity.

Be: 3 × 9.01 g = 27.03 g

Al: 2 × 26.98 g = 53.96 g

Si: 16 × 28.09 g = 449.4 g

O: 18 × 16.00 g = 288.0 g

Total mass = 818.4 g

The mass percentage of silicon is:

(449.4 g / 818.4 g) × 100% = 54.91%

4 0
3 years ago
Nitrogen and oxygen form an extensive series of oxides with the general formula NxOy. One of them is a blue solid that comes apa
Marizza181 [45]

Work out the number of moles in

100.00 grams of the oxide.

For nitrogen: The atomic mass of N is 14.0067, and we have 36.84 g N:

36.84 g N14.0067 g N/mol N=2.630 mol N

For oxygen: The atomic mass of O is

15.9994, and we have

100.00−36.84=63.16 g O:

63.16 g N 15.9994 g N/mol N=3.948 mol N

Now the ratio 3.958 2.630 is very close to

1.5=32

. So we conclude that the gas has three moles

O to two moles N making the empirical formula

N2O3.

<h2><u>Mark as Brainliest</u></h2>
5 0
3 years ago
3. A Covalent bonds form between atoms<br> of which type of elements?
daser333 [38]

Answer:

Atoms with high electro negativity

7 0
3 years ago
Read 2 more answers
What happens to water when it changes to ice?
Evgesh-ka [11]

Answer:

When water is changed into ice it have low density and larger volume.

Explanation:

Water molecules are connected with each through hydrogen bonding.

When water is changed into ice the distance between water molecules increases and thus ice occupy large volume and its density decreases because of larger distance between molecules and empty spaces present between them.

That's why when ice is drop into water ice float on the surface because of low density.

While the object with greater density than water are sink into it when placed into water.

The density of water is  1.00 g/cm³ while density of ice is 0.92 g/cm³.

5 0
3 years ago
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