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3 years ago

A molecule B compound C atom D element

Chemistry

1 answer:

Svetllana [295]3 years ago

8 0

Answer:

D. Element.

Explanation:

Atoms form elements. Elements form molecules. Molecules form compounds.

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Stolb23 [73]

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sj xisn d sk shshs dj h Bs jshosusugs sjizhxbebs dnshs dns jsygs s. Si d d

6 0

3 years ago

Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. a particular ore contains 68.5% gal

rjkz [21]

The volume of sphere can be calculated using the following formula:

$V=\frac{4}{3}\pi r^{3}$

Here, r is radius of the sphere which is 8 cm. Putting the value,

$V=\frac{4}{3}\pi r^{3}=\frac{4}{3}(3.14)(8 cm)^{3}=2143.57 cm^{3}$

This is equal to the volume of lead, density of lead is $11.34 g/cm^{3}$ thus, mass of lead can be calculated as follows:

$m=d\times V=11.34 g/cm^{3}\times 2143.57 cm^{3}=2.43\times 10^{4}g$

Let the mass of ore be 1 g, 68.5% of galena is obtained by mass, thus, mass of galena obtained will be 0.685 g.

Now, 86.6% of lead is obtained from this gram of galena, thus, mass of lead will be:

m=0.685×0.866=0.5932 g

Therefore, 0.5932 g of lead is obtained from 1 g of ore, if the efficiency is 100%.

For 92.5% efficiency, mass of lead obtained will be:

$m=\frac{92.5}{100}\times 0.5932=0.5487 g$

Thus, 1 g of lead obtain from $\frac{1}{0.5487}=1.822$ grams of ore.

Thus, $2.43\times 10^{4} g$ of lead obtain from:

$2.43\times 10^{4}\times 1.822=4.42\times 10^{4}g=44.2 kg$

Therefore, mass of ore required to make lead sphere is 44.2 kg.

4 0

3 years ago

Read 2 more answers

Hydrocarbons containing a saturated carbon ring are called _____.

lisabon 2012 [21]

Answer : The hydrocarbons containing a saturated carbon ring are called Aliphatic cyclic hydrocarbon.

Explanation :

As the organic compounds are classified into two categories that is acyclic (aliphatic) and cyclic (aromatic) compounds.

Acyclic compounds : It is an open chain compound with linear structure.

Cyclic compounds : It is a closed chain compound having a carbon ring structure.

Hydrocarbon : It is an organic compound that contains only hydrogen and the carbon atoms. They are of two types which are saturated hydrocarbon and unsaturated hydrocarbon.

Saturated hydrocarbon : These are the compounds which containing single bonds between the carbon-carbon atoms. In saturated compounds, there are more number of hydrogen bonded with the carbon atom.

Unsaturated hydrocarbon : These are the compounds which containing double and triple bonds between the carbon-carbon atoms. In unsaturated compounds, there are less number of hydrogen bonded with the carbon atom.

Hence, the hydrocarbons containing a saturated carbon ring are called Aliphatic cyclic hydrocarbon.

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4 years ago

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What are some chemical equations that follow the law of conservation of matter and why?

Rina8888 [55]

Answer:

Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. Therefore, there must be the same number of atoms of each element on each side of a chemical equation.

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4 years ago

Which of the following compounds is most likely to dissolve in water?

Softa [21]

Answer: depending on what your list contained, probably something like salt, sugar, citric acid, smoke, etc.

Explanation:

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3 years ago

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