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4 years ago

The nucleus of an atom contains which subatomic particles?

Chemistry

2 answers:

finlep [7]4 years ago

8 0

The nucleus contains protons and nuetrons

coldgirl [10]4 years ago

4 0

Answer : The nucleus of an atom contains neutrons and proton subatomic particles.

Explanation :

As we know that an atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.

The protons and the neutrons are located inside the nucleus or center of the nucleus where the mass of the an atom is concentrated and the electrons are located around the nucleus.

The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.

Hence, the nucleus of an atom contains neutrons and proton subatomic particles.

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a major textile dye manufacutrer developed a new yellow dye. the dye has a percent composition of 75.95%C, 17.72%n and 6.33%H by

Delicious77 [7]

The molecular formula of dye:

A major textile dye manufacturer developed a new yellow dye with a molecular formula $C_{15}N_{3}H_{15}$ .

Given:

Percentage composition:

C = 75.95%

N = 17.72%

H = 6.33%

Molar mass = 240 g

To find: molecular formula of dye

Calculation:

Let's assume the mass of the compound is 100 gm.

So, Mass of C = 75.95 gm

Mass of N = 17.72 gm

Mass of H = 6.33 gm

The number of moles = given mass/mass

Therefore, the number of moles of C = 75.95/12 = 6.33

The number of moles of N = 17.72/14 = 1.27

Number of moles of H =6.33/1 = 6.33

Simplest ratio:

C = 6.33/1.27 = 4.98 =5

N = 1.27/1.27 = 1

H = 6.33/1.27 = 4.98 =5

Therefore, the empirical formula is $C_{5}NH_{5}$

The mass of empirical formula = 12 x 5 + 14 + 1 x 5 = 79 gm

Number of moles= molar mass/ empirical formula

n = 240/79 = 3.04 =3

Therefore, molecular formula = empirical formula x n

Hence, molecular formula = $C_{15}N_{3}H_{15}$

Learn more about molecular formulas here,

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6 0

2 years ago

Which of the following would be a good solvent choice when preparing your sample for 1H NMR?

user100 [1]

Answer:

e. None of the answer choices

Explanation:

The solvents used for 1HNMR analysis are chloroform D (CDCl3), and acetone D6 (CD3COCD3) and deuterium oxide (D2O).
And here any of these three nans are listed in the given option so that we can say that none of the answers are correct.
so correct answer is e. None of the answer choices

6 0

4 years ago

What it’s used to determine the number of each atom in an ionic formula

Gala2k [10]

Answer:

If the electronegativity difference is greater than 2.0, then the bond is ionic.

Explanation:

For ex:

Na has the electronegativity of 0.93

Cl has the electronegativity of 3.16

we subtract 3.16-0.93

We have 2.23 electronegativity difference between Na and Cl

because 2.23 > 2.0

therefore NaCl compound has an ionic bond.

6 0

3 years ago

Read 2 more answers

What Size container do you need to hold 0.0459 mol of N2 gas at stp

Allushta [10]

Hello!

You need to calculate the volume of the container. To calculate the volume of this amount of N₂ gas we need to make the assumption that N₂ behaves like an ideal gas.

1 mole of an ideal gas under Standard Temperature and Pressure occupies 22,4 L so the calculations are as follows:

$0,0459 mol N_2* \frac{22,4 L}{1 mol N_2}= 1,028 L$

So, the volume of the container should be 1,028 L or more.

Have a nice day!

4 0

3 years ago

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.79 g/mL, 1.8

Pachacha [2.7K]

Answer:

(B) Her results are both precise and accurate.

Explanation:

In Chemistry, Accuracy refers to how close a measurement is to it's standard value or known value. On the other hand, Precision means how close two measurement are to each other regardless whether the results are accurate or not.

In the above question, all the above results are very close to each other. That's why the results are Precise to each other. All the results are close enough to the actual value of the experiment. That's why the result are also accurate.

5 0

4 years ago