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LUCKY_DIMON [66]
3 years ago
5

To find the number of neutrons in an atom, subtract its _____.

Chemistry
2 answers:
SpyIntel [72]3 years ago
8 0

Explanation:

It is known that an atom consists of protons, neutrons and electrons. Both protons and neutrons are located inside the nucleus of an atom whereas electrons revolve around the nucleus.

Atomic number is the total number of protons present in an atom. On the other hand, atomic mass is the sum of total number of protons and neutrons present in an atom.

That is,     Atomic mass = no. of protons + no. of neutrons

                 no. of neutrons = atomic mass - no. of protons

Therefore, we can conclude that to find the number of neutrons in an atom, subtract its number of protons from atomic mass.

Komok [63]3 years ago
6 0
Subtract it's atomic number from it's mass number
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A sample of gas A has a molar mass of 4 grams while a sample of gas B has a molar mass of 16 grams. Which statement holds true?
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4 years ago
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Carbon disulfide is prepared industrially by reacting carbon with sulfur dioxide according to the above equation. If 70.8 g of c
Rus_ich [418]

Answer:

1.18 moles of CS₂ are produced by the reaction.

Explanation:

We present the reaction:

5C + 2SO₂  →  CS₂  +  4CO

5 moles of carbon react to 2 moles of sulfur dioxide in order to produce 1 mol of carbon disulfide and 4 moles of carbon monoxide.

As we do not have data from the SO₂, we assume this as the excess reagent. We convert the mass of carbon to moles:

70.8 g / 12 g/mol = 5.9 moles

Ratio is 5:1, so 5 moles of carbon react to produce 1 mol of CS₂

Then, 5.9 moles will produce (5.9 . 1) / 5 = 1.18 moles

8 0
3 years ago
What kind of chemical bond is found between paired bases of the dna double helix?
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3 years ago
What is chemical formula for: Iron (III) fluoride
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Answer:

FeF3

Explanation:

You have to break this problems down and know the naming rules.

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6 0
3 years ago
Using the balanced chemical reaction below, how many grams of copper (cu) metal can be obtained from 1.00 kg of copper ore (cu3f
aleksklad [387]

Answer : Mass of copper (Cu) metal obtained = 556.281 g

Solution : Given,

Mass of copper ore = 1 Kg = 1000 g

From the periodic table, the molar mass of copper and copper ore are

Molar mass of copper = 63.546 g/mole

Molar mass of copper ore, Cu_{3}FeS_{3} = 342.678 g/mole

First we have to calculate the number of moles of copper ore, Cu_{3}FeS_{3}

Moles of  Cu_{3}FeS_{3} = \frac{\text{ Mass of copper ore}}{\text{ Molar mass of copper ore}} = \frac{1000g}{342.678g/mole} = 2.918 moles

The balanced chemical reaction is :

2Cu_{3} FeS_{3}(s)+7O_{2}(g)\rightarrow 6Cu(s)+2FeO(s)+6SO_{2}(g)

From this chemical reaction, we conclude that

2 moles of Cu_{3}FeS_{3} gives          →     6 moles of Cu

2.918 moles of Cu_{3}FeS_{3} gives   →      \frac{6moles}{2moles}\times 2.918moles

                                                           = 8.754 moles

Thus, the Moles of copper (Cu) = 8.754 moles

Now, calculate the Mass of copper (Cu).

Mass of copper (Cu) = Moles of copper (Cu) × Molar mass of copper (Cu)

                                  = 8.757 moles × 63.546 g/moles

                                  = 556.281 g                                

4 0
3 years ago
Read 2 more answers
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